./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.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/pc_sfifo_1.cil-2+token_ring.15.cil.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 a9fe331e5302255756e033832e890b54b7bae1c0bb354f9ba1bbe18985f952e5 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:31:08,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:31:08,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:31:08,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:31:08,110 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:31:08,112 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:31:08,113 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:31:08,118 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:31:08,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:31:08,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:31:08,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:31:08,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:31:08,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:31:08,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:31:08,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:31:08,134 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:31:08,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:31:08,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:31:08,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:31:08,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:31:08,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:31:08,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:31:08,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:31:08,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:31:08,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:31:08,148 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:31:08,148 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:31:08,149 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:31:08,150 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:31:08,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:31:08,151 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:31:08,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:31:08,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:31:08,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:31:08,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:31:08,154 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:31:08,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:31:08,155 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:31:08,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:31:08,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:31:08,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:31:08,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:31:08,179 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:31:08,183 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:31:08,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:31:08,184 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:31:08,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:31:08,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:31:08,185 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:31:08,185 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:31:08,185 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:31:08,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:31:08,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:31:08,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:31:08,186 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:31:08,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:31:08,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:31:08,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:31:08,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:31:08,187 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:31:08,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:31:08,187 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:31:08,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:31:08,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:31:08,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:31:08,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:31:08,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:31:08,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:31:08,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:31:08,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:31:08,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:31:08,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:31:08,190 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:31:08,190 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:31:08,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:31:08,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:31:08,190 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9fe331e5302255756e033832e890b54b7bae1c0bb354f9ba1bbe18985f952e5 [2021-12-16 02:31:08,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:31:08,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:31:08,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:31:08,434 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:31:08,435 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:31:08,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c [2021-12-16 02:31:08,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19c0b7e76/0dadb261194546779ec0c518d51cf81f/FLAG7ae2f14a7 [2021-12-16 02:31:08,822 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:31:08,823 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c [2021-12-16 02:31:08,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19c0b7e76/0dadb261194546779ec0c518d51cf81f/FLAG7ae2f14a7 [2021-12-16 02:31:09,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19c0b7e76/0dadb261194546779ec0c518d51cf81f [2021-12-16 02:31:09,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:31:09,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:31:09,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:31:09,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:31:09,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:31:09,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d53a411 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09, skipping insertion in model container [2021-12-16 02:31:09,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,233 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:31:09,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:31:09,384 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/pc_sfifo_1.cil-2+token_ring.15.cil.c[913,926] [2021-12-16 02:31:09,409 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/pc_sfifo_1.cil-2+token_ring.15.cil.c[5977,5990] [2021-12-16 02:31:09,496 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:31:09,503 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:31:09,510 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/pc_sfifo_1.cil-2+token_ring.15.cil.c[913,926] [2021-12-16 02:31:09,517 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/pc_sfifo_1.cil-2+token_ring.15.cil.c[5977,5990] [2021-12-16 02:31:09,548 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:31:09,562 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:31:09,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09 WrapperNode [2021-12-16 02:31:09,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:31:09,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:31:09,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:31:09,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:31:09,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,604 INFO L137 Inliner]: procedures = 74, calls = 88, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1116 [2021-12-16 02:31:09,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:31:09,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:31:09,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:31:09,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:31:09,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,638 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:31:09,639 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:31:09,639 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:31:09,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:31:09,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (1/1) ... [2021-12-16 02:31:09,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:31:09,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:09,688 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) [2021-12-16 02:31:09,697 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 [2021-12-16 02:31:09,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:31:09,720 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-16 02:31:09,720 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-16 02:31:09,720 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-16 02:31:09,721 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-16 02:31:09,722 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-16 02:31:09,722 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-16 02:31:09,722 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-16 02:31:09,722 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-16 02:31:09,722 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-16 02:31:09,722 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-16 02:31:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-16 02:31:09,723 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-16 02:31:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-16 02:31:09,723 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-16 02:31:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:31:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-16 02:31:09,723 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-16 02:31:09,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:31:09,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:31:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-16 02:31:09,724 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-16 02:31:09,724 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-16 02:31:09,724 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-16 02:31:09,882 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:31:09,884 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:31:10,468 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:31:10,481 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:31:10,484 INFO L301 CfgBuilder]: Removed 20 assume(true) statements. [2021-12-16 02:31:10,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:31:10 BoogieIcfgContainer [2021-12-16 02:31:10,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:31:10,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:31:10,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:31:10,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:31:10,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:31:09" (1/3) ... [2021-12-16 02:31:10,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d80935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:31:10, skipping insertion in model container [2021-12-16 02:31:10,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:09" (2/3) ... [2021-12-16 02:31:10,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d80935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:31:10, skipping insertion in model container [2021-12-16 02:31:10,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:31:10" (3/3) ... [2021-12-16 02:31:10,493 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.15.cil.c [2021-12-16 02:31:10,496 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:31:10,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:31:10,543 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:31:10,549 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 [2021-12-16 02:31:10,550 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:31:10,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 485 states, 437 states have (on average 1.654462242562929) internal successors, (723), 444 states have internal predecessors, (723), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-12-16 02:31:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 02:31:10,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:10,598 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] [2021-12-16 02:31:10,598 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:10,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:10,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1777034307, now seen corresponding path program 1 times [2021-12-16 02:31:10,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:10,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622759912] [2021-12-16 02:31:10,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:10,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:10,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:10,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:10,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 02:31:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:10,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622759912] [2021-12-16 02:31:10,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622759912] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:10,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:10,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:31:10,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614915135] [2021-12-16 02:31:10,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:10,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:31:10,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:10,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:31:10,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:31:10,870 INFO L87 Difference]: Start difference. First operand has 485 states, 437 states have (on average 1.654462242562929) internal successors, (723), 444 states have internal predecessors, (723), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 02:31:11,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:11,361 INFO L93 Difference]: Finished difference Result 951 states and 1551 transitions. [2021-12-16 02:31:11,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:31:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2021-12-16 02:31:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:11,377 INFO L225 Difference]: With dead ends: 951 [2021-12-16 02:31:11,377 INFO L226 Difference]: Without dead ends: 483 [2021-12-16 02:31:11,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:31:11,385 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 407 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:11,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 1470 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 02:31:11,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-12-16 02:31:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 474. [2021-12-16 02:31:11,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 429 states have (on average 1.5617715617715617) internal successors, (670), 433 states have internal predecessors, (670), 35 states have call successors, (35), 10 states have call predecessors, (35), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-12-16 02:31:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 736 transitions. [2021-12-16 02:31:11,445 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 736 transitions. Word has length 44 [2021-12-16 02:31:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:11,445 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 736 transitions. [2021-12-16 02:31:11,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-16 02:31:11,446 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 736 transitions. [2021-12-16 02:31:11,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 02:31:11,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:11,447 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] [2021-12-16 02:31:11,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:31:11,448 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:11,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:11,449 INFO L85 PathProgramCache]: Analyzing trace with hash -672565823, now seen corresponding path program 1 times [2021-12-16 02:31:11,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:11,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888479347] [2021-12-16 02:31:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:11,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:11,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:11,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:11,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:11,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-16 02:31:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:11,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:11,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:11,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888479347] [2021-12-16 02:31:11,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888479347] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:11,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:11,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:31:11,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681245019] [2021-12-16 02:31:11,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:11,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:31:11,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:11,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:31:11,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:31:11,503 INFO L87 Difference]: Start difference. First operand 474 states and 736 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:31:11,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:11,647 INFO L93 Difference]: Finished difference Result 606 states and 921 transitions. [2021-12-16 02:31:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:31:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-16 02:31:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:11,651 INFO L225 Difference]: With dead ends: 606 [2021-12-16 02:31:11,651 INFO L226 Difference]: Without dead ends: 544 [2021-12-16 02:31:11,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:31:11,656 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 1004 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:11,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1031 Valid, 1169 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:31:11,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2021-12-16 02:31:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 538. [2021-12-16 02:31:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 486 states have (on average 1.5349794238683128) internal successors, (746), 491 states have internal predecessors, (746), 39 states have call successors, (39), 12 states have call predecessors, (39), 11 states have return successors, (41), 35 states have call predecessors, (41), 35 states have call successors, (41) [2021-12-16 02:31:11,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 826 transitions. [2021-12-16 02:31:11,694 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 826 transitions. Word has length 44 [2021-12-16 02:31:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:11,694 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 826 transitions. [2021-12-16 02:31:11,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:31:11,694 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 826 transitions. [2021-12-16 02:31:11,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 02:31:11,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:11,696 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] [2021-12-16 02:31:11,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:31:11,697 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:11,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1398106659, now seen corresponding path program 1 times [2021-12-16 02:31:11,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:11,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564098683] [2021-12-16 02:31:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:11,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:11,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:11,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 02:31:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:11,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:11,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564098683] [2021-12-16 02:31:11,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564098683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:11,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:11,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:31:11,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892521152] [2021-12-16 02:31:11,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:11,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:31:11,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:31:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:31:11,749 INFO L87 Difference]: Start difference. First operand 538 states and 826 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:31:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:12,090 INFO L93 Difference]: Finished difference Result 786 states and 1166 transitions. [2021-12-16 02:31:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:31:12,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-16 02:31:12,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:12,094 INFO L225 Difference]: With dead ends: 786 [2021-12-16 02:31:12,094 INFO L226 Difference]: Without dead ends: 662 [2021-12-16 02:31:12,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:31:12,095 INFO L933 BasicCegarLoop]: 782 mSDtfsCounter, 388 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:12,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 1576 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:31:12,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-16 02:31:12,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 605. [2021-12-16 02:31:12,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 547 states have (on average 1.517367458866545) internal successors, (830), 552 states have internal predecessors, (830), 42 states have call successors, (42), 15 states have call predecessors, (42), 14 states have return successors, (44), 38 states have call predecessors, (44), 38 states have call successors, (44) [2021-12-16 02:31:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 916 transitions. [2021-12-16 02:31:12,128 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 916 transitions. Word has length 45 [2021-12-16 02:31:12,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:12,129 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 916 transitions. [2021-12-16 02:31:12,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:31:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 916 transitions. [2021-12-16 02:31:12,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-16 02:31:12,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:12,130 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] [2021-12-16 02:31:12,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:31:12,131 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1612503176, now seen corresponding path program 1 times [2021-12-16 02:31:12,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:12,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204023360] [2021-12-16 02:31:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:12,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:12,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-16 02:31:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:12,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:12,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204023360] [2021-12-16 02:31:12,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204023360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:12,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:12,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:31:12,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297559944] [2021-12-16 02:31:12,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:12,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:31:12,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:12,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:31:12,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:31:12,171 INFO L87 Difference]: Start difference. First operand 605 states and 916 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:31:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:12,310 INFO L93 Difference]: Finished difference Result 1013 states and 1475 transitions. [2021-12-16 02:31:12,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:31:12,310 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-16 02:31:12,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:12,314 INFO L225 Difference]: With dead ends: 1013 [2021-12-16 02:31:12,314 INFO L226 Difference]: Without dead ends: 822 [2021-12-16 02:31:12,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:31:12,315 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 1021 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:12,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1048 Valid, 1196 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:31:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-12-16 02:31:12,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 770. [2021-12-16 02:31:12,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 693 states have (on average 1.4718614718614718) internal successors, (1020), 701 states have internal predecessors, (1020), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (61), 47 states have call predecessors, (61), 49 states have call successors, (61) [2021-12-16 02:31:12,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 1134 transitions. [2021-12-16 02:31:12,340 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 1134 transitions. Word has length 45 [2021-12-16 02:31:12,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:12,340 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 1134 transitions. [2021-12-16 02:31:12,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 02:31:12,340 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 1134 transitions. [2021-12-16 02:31:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-16 02:31:12,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:12,342 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:31:12,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:31:12,342 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:12,343 INFO L85 PathProgramCache]: Analyzing trace with hash 900213873, now seen corresponding path program 1 times [2021-12-16 02:31:12,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:12,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409889821] [2021-12-16 02:31:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:12,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 02:31:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 02:31:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:31:12,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:12,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409889821] [2021-12-16 02:31:12,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409889821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:12,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:12,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:31:12,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412057157] [2021-12-16 02:31:12,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:12,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:31:12,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:31:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:31:12,417 INFO L87 Difference]: Start difference. First operand 770 states and 1134 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 02:31:12,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:12,759 INFO L93 Difference]: Finished difference Result 1114 states and 1595 transitions. [2021-12-16 02:31:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:31:12,760 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-16 02:31:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:12,765 INFO L225 Difference]: With dead ends: 1114 [2021-12-16 02:31:12,765 INFO L226 Difference]: Without dead ends: 877 [2021-12-16 02:31:12,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:31:12,769 INFO L933 BasicCegarLoop]: 805 mSDtfsCounter, 372 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:12,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 1600 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:31:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-12-16 02:31:12,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 839. [2021-12-16 02:31:12,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 753 states have (on average 1.447543160690571) internal successors, (1090), 762 states have internal predecessors, (1090), 58 states have call successors, (58), 25 states have call predecessors, (58), 26 states have return successors, (70), 52 states have call predecessors, (70), 54 states have call successors, (70) [2021-12-16 02:31:12,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 1218 transitions. [2021-12-16 02:31:12,805 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 1218 transitions. Word has length 62 [2021-12-16 02:31:12,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:12,806 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 1218 transitions. [2021-12-16 02:31:12,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 02:31:12,806 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 1218 transitions. [2021-12-16 02:31:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 02:31:12,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:12,808 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:31:12,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:31:12,808 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:12,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:12,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1329361574, now seen corresponding path program 1 times [2021-12-16 02:31:12,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:12,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234213481] [2021-12-16 02:31:12,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:12,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 02:31:12,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 02:31:12,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:12,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234213481] [2021-12-16 02:31:12,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234213481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:12,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:12,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 02:31:12,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531104456] [2021-12-16 02:31:12,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:12,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:31:12,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:12,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:31:12,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:31:12,872 INFO L87 Difference]: Start difference. First operand 839 states and 1218 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 02:31:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:13,029 INFO L93 Difference]: Finished difference Result 1390 states and 1940 transitions. [2021-12-16 02:31:13,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:31:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-16 02:31:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:13,033 INFO L225 Difference]: With dead ends: 1390 [2021-12-16 02:31:13,034 INFO L226 Difference]: Without dead ends: 1012 [2021-12-16 02:31:13,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:31:13,038 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 1008 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:13,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 1193 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:31:13,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-12-16 02:31:13,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 957. [2021-12-16 02:31:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 858 states have (on average 1.4172494172494172) internal successors, (1216), 868 states have internal predecessors, (1216), 65 states have call successors, (65), 30 states have call predecessors, (65), 32 states have return successors, (81), 59 states have call predecessors, (81), 61 states have call successors, (81) [2021-12-16 02:31:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1362 transitions. [2021-12-16 02:31:13,085 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1362 transitions. Word has length 67 [2021-12-16 02:31:13,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:13,086 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 1362 transitions. [2021-12-16 02:31:13,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 02:31:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1362 transitions. [2021-12-16 02:31:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:31:13,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:13,088 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:31:13,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 02:31:13,088 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1793949335, now seen corresponding path program 1 times [2021-12-16 02:31:13,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:13,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385832541] [2021-12-16 02:31:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:13,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:13,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:13,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 02:31:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:13,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 02:31:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 02:31:13,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385832541] [2021-12-16 02:31:13,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385832541] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:13,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974908564] [2021-12-16 02:31:13,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:13,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:13,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:13,192 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) [2021-12-16 02:31:13,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:31:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:13,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:31:13,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:31:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:31:13,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:31:13,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974908564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:13,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:31:13,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 02:31:13,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539361099] [2021-12-16 02:31:13,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:13,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:31:13,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:13,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:31:13,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:13,447 INFO L87 Difference]: Start difference. First operand 957 states and 1362 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 02:31:13,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:13,525 INFO L93 Difference]: Finished difference Result 1400 states and 1957 transitions. [2021-12-16 02:31:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:31:13,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 68 [2021-12-16 02:31:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:13,530 INFO L225 Difference]: With dead ends: 1400 [2021-12-16 02:31:13,542 INFO L226 Difference]: Without dead ends: 955 [2021-12-16 02:31:13,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:13,544 INFO L933 BasicCegarLoop]: 786 mSDtfsCounter, 72 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:13,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1494 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:31:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-12-16 02:31:13,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 911. [2021-12-16 02:31:13,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 818 states have (on average 1.4107579462102688) internal successors, (1154), 828 states have internal predecessors, (1154), 61 states have call successors, (61), 28 states have call predecessors, (61), 30 states have return successors, (75), 55 states have call predecessors, (75), 57 states have call successors, (75) [2021-12-16 02:31:13,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1290 transitions. [2021-12-16 02:31:13,578 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1290 transitions. Word has length 68 [2021-12-16 02:31:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:13,578 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 1290 transitions. [2021-12-16 02:31:13,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 02:31:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1290 transitions. [2021-12-16 02:31:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:31:13,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:13,580 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:31:13,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:31:13,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:13,798 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 386022440, now seen corresponding path program 1 times [2021-12-16 02:31:13,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:13,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344263222] [2021-12-16 02:31:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:13,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:13,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:13,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:13,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 02:31:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:13,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 02:31:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:31:13,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344263222] [2021-12-16 02:31:13,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344263222] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048500612] [2021-12-16 02:31:13,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:13,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:13,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:13,883 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) [2021-12-16 02:31:13,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:31:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:13,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 02:31:13,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:31:14,112 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:14,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:31:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 02:31:14,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048500612] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:14,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-16 02:31:14,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-16 02:31:14,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448610053] [2021-12-16 02:31:14,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:14,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:31:14,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:14,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:31:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:14,205 INFO L87 Difference]: Start difference. First operand 911 states and 1290 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 02:31:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:14,338 INFO L93 Difference]: Finished difference Result 962 states and 1351 transitions. [2021-12-16 02:31:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 02:31:14,338 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-16 02:31:14,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:14,342 INFO L225 Difference]: With dead ends: 962 [2021-12-16 02:31:14,342 INFO L226 Difference]: Without dead ends: 959 [2021-12-16 02:31:14,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:31:14,344 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 1343 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 823 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:14,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 823 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:31:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-12-16 02:31:14,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 910. [2021-12-16 02:31:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 818 states have (on average 1.4083129584352079) internal successors, (1152), 827 states have internal predecessors, (1152), 60 states have call successors, (60), 28 states have call predecessors, (60), 30 states have return successors, (75), 55 states have call predecessors, (75), 57 states have call successors, (75) [2021-12-16 02:31:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1287 transitions. [2021-12-16 02:31:14,378 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1287 transitions. Word has length 68 [2021-12-16 02:31:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:14,378 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 1287 transitions. [2021-12-16 02:31:14,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 02:31:14,379 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1287 transitions. [2021-12-16 02:31:14,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:31:14,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:14,380 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:31:14,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-16 02:31:14,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-16 02:31:14,595 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:14,596 INFO L85 PathProgramCache]: Analyzing trace with hash -919689015, now seen corresponding path program 1 times [2021-12-16 02:31:14,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:14,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321309573] [2021-12-16 02:31:14,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:14,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:14,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:14,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:14,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 02:31:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:14,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-16 02:31:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:31:14,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:14,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321309573] [2021-12-16 02:31:14,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321309573] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:14,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368396339] [2021-12-16 02:31:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:14,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:14,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:14,667 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) [2021-12-16 02:31:14,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:31:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:14,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 02:31:14,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:31:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:15,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:31:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 02:31:15,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368396339] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:31:15,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:31:15,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-16 02:31:15,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276417144] [2021-12-16 02:31:15,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:31:15,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-16 02:31:15,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:15,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-16 02:31:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:15,117 INFO L87 Difference]: Start difference. First operand 910 states and 1287 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-16 02:31:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:16,340 INFO L93 Difference]: Finished difference Result 2251 states and 3010 transitions. [2021-12-16 02:31:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-16 02:31:16,340 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-16 02:31:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:16,347 INFO L225 Difference]: With dead ends: 2251 [2021-12-16 02:31:16,347 INFO L226 Difference]: Without dead ends: 1855 [2021-12-16 02:31:16,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 02:31:16,350 INFO L933 BasicCegarLoop]: 859 mSDtfsCounter, 1361 mSDsluCounter, 3251 mSDsCounter, 0 mSdLazyCounter, 1976 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 4110 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:16,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1395 Valid, 4110 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1976 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 02:31:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-12-16 02:31:16,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1274. [2021-12-16 02:31:16,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 1146 states have (on average 1.3551483420593369) internal successors, (1553), 1161 states have internal predecessors, (1553), 79 states have call successors, (79), 41 states have call predecessors, (79), 47 states have return successors, (106), 72 states have call predecessors, (106), 76 states have call successors, (106) [2021-12-16 02:31:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1738 transitions. [2021-12-16 02:31:16,396 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1738 transitions. Word has length 69 [2021-12-16 02:31:16,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:16,396 INFO L470 AbstractCegarLoop]: Abstraction has 1274 states and 1738 transitions. [2021-12-16 02:31:16,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-16 02:31:16,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1738 transitions. [2021-12-16 02:31:16,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-16 02:31:16,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:16,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-16 02:31:16,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:31:16,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:16,616 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1261346069, now seen corresponding path program 1 times [2021-12-16 02:31:16,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:16,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232284101] [2021-12-16 02:31:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:16,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:16,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:16,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 02:31:16,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:16,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-16 02:31:16,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:16,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-16 02:31:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-16 02:31:16,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:16,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232284101] [2021-12-16 02:31:16,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232284101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:16,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215642214] [2021-12-16 02:31:16,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:16,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:16,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:16,669 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) [2021-12-16 02:31:16,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:31:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:16,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:31:16,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:31:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-16 02:31:16,887 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:31:16,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215642214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:16,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:31:16,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 02:31:16,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080044118] [2021-12-16 02:31:16,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:16,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:31:16,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:16,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:31:16,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:16,889 INFO L87 Difference]: Start difference. First operand 1274 states and 1738 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 02:31:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:16,924 INFO L93 Difference]: Finished difference Result 1886 states and 2516 transitions. [2021-12-16 02:31:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:31:16,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-16 02:31:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:16,929 INFO L225 Difference]: With dead ends: 1886 [2021-12-16 02:31:16,929 INFO L226 Difference]: Without dead ends: 1214 [2021-12-16 02:31:16,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:16,931 INFO L933 BasicCegarLoop]: 765 mSDtfsCounter, 695 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:16,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 837 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:31:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-12-16 02:31:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 1208. [2021-12-16 02:31:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1087 states have (on average 1.3523459061637535) internal successors, (1470), 1102 states have internal predecessors, (1470), 76 states have call successors, (76), 38 states have call predecessors, (76), 43 states have return successors, (101), 68 states have call predecessors, (101), 73 states have call successors, (101) [2021-12-16 02:31:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1647 transitions. [2021-12-16 02:31:16,967 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1647 transitions. Word has length 88 [2021-12-16 02:31:16,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:16,967 INFO L470 AbstractCegarLoop]: Abstraction has 1208 states and 1647 transitions. [2021-12-16 02:31:16,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 02:31:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1647 transitions. [2021-12-16 02:31:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-16 02:31:16,970 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:16,970 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-16 02:31:16,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 02:31:17,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:17,183 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:17,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1632614229, now seen corresponding path program 1 times [2021-12-16 02:31:17,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:17,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176880297] [2021-12-16 02:31:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:17,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 02:31:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-16 02:31:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-16 02:31:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 02:31:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-16 02:31:17,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:17,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176880297] [2021-12-16 02:31:17,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176880297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:17,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802609604] [2021-12-16 02:31:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:17,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:17,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:17,261 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) [2021-12-16 02:31:17,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:31:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:31:17,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:31:17,488 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 02:31:17,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:31:17,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802609604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:17,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:31:17,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 02:31:17,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560404568] [2021-12-16 02:31:17,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:17,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:31:17,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:31:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:17,493 INFO L87 Difference]: Start difference. First operand 1208 states and 1647 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 02:31:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:17,530 INFO L93 Difference]: Finished difference Result 1518 states and 2028 transitions. [2021-12-16 02:31:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:31:17,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-16 02:31:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:17,533 INFO L225 Difference]: With dead ends: 1518 [2021-12-16 02:31:17,533 INFO L226 Difference]: Without dead ends: 408 [2021-12-16 02:31:17,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:17,536 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 60 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:17,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1488 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:31:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-12-16 02:31:17,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2021-12-16 02:31:17,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 372 states have (on average 1.5833333333333333) internal successors, (589), 374 states have internal predecessors, (589), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-16 02:31:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 645 transitions. [2021-12-16 02:31:17,547 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 645 transitions. Word has length 103 [2021-12-16 02:31:17,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:17,548 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 645 transitions. [2021-12-16 02:31:17,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 02:31:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 645 transitions. [2021-12-16 02:31:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:17,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:17,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:17,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 02:31:17,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 02:31:17,768 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash -985829240, now seen corresponding path program 1 times [2021-12-16 02:31:17,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921489574] [2021-12-16 02:31:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:17,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:17,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:17,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:17,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921489574] [2021-12-16 02:31:17,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921489574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:17,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:17,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:31:17,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45369979] [2021-12-16 02:31:17,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:17,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:31:17,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:31:17,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:31:17,883 INFO L87 Difference]: Start difference. First operand 408 states and 645 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:19,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:19,022 INFO L93 Difference]: Finished difference Result 960 states and 1541 transitions. [2021-12-16 02:31:19,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:31:19,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:19,025 INFO L225 Difference]: With dead ends: 960 [2021-12-16 02:31:19,025 INFO L226 Difference]: Without dead ends: 561 [2021-12-16 02:31:19,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:19,027 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1113 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:19,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 1160 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 02:31:19,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-12-16 02:31:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 408. [2021-12-16 02:31:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 372 states have (on average 1.5806451612903225) internal successors, (588), 374 states have internal predecessors, (588), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-16 02:31:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 644 transitions. [2021-12-16 02:31:19,044 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 644 transitions. Word has length 190 [2021-12-16 02:31:19,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:19,045 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 644 transitions. [2021-12-16 02:31:19,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:19,045 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 644 transitions. [2021-12-16 02:31:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:19,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:19,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:19,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 02:31:19,047 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:19,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1458168886, now seen corresponding path program 1 times [2021-12-16 02:31:19,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:19,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144843159] [2021-12-16 02:31:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:19,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:19,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:19,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:19,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:19,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:19,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144843159] [2021-12-16 02:31:19,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144843159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:19,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:19,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:31:19,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629255394] [2021-12-16 02:31:19,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:19,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:31:19,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:19,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:31:19,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:31:19,161 INFO L87 Difference]: Start difference. First operand 408 states and 644 transitions. Second operand has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:20,264 INFO L93 Difference]: Finished difference Result 952 states and 1524 transitions. [2021-12-16 02:31:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:31:20,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:20,266 INFO L225 Difference]: With dead ends: 952 [2021-12-16 02:31:20,267 INFO L226 Difference]: Without dead ends: 561 [2021-12-16 02:31:20,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:20,268 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 1104 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:20,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1129 Valid, 1158 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-16 02:31:20,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2021-12-16 02:31:20,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 408. [2021-12-16 02:31:20,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 372 states have (on average 1.5779569892473118) internal successors, (587), 374 states have internal predecessors, (587), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-16 02:31:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 643 transitions. [2021-12-16 02:31:20,286 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 643 transitions. Word has length 190 [2021-12-16 02:31:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:20,287 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 643 transitions. [2021-12-16 02:31:20,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.8) internal successors, (179), 3 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 643 transitions. [2021-12-16 02:31:20,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:20,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:20,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:20,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 02:31:20,289 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:20,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:20,290 INFO L85 PathProgramCache]: Analyzing trace with hash -89708276, now seen corresponding path program 1 times [2021-12-16 02:31:20,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:20,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017029639] [2021-12-16 02:31:20,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:20,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:20,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:20,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:20,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:20,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:20,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:20,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:20,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017029639] [2021-12-16 02:31:20,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017029639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:20,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:20,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:31:20,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069579882] [2021-12-16 02:31:20,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:20,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:31:20,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:20,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:31:20,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:31:20,407 INFO L87 Difference]: Start difference. First operand 408 states and 643 transitions. Second operand has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:21,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:21,861 INFO L93 Difference]: Finished difference Result 946 states and 1514 transitions. [2021-12-16 02:31:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:31:21,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:21,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:21,864 INFO L225 Difference]: With dead ends: 946 [2021-12-16 02:31:21,864 INFO L226 Difference]: Without dead ends: 560 [2021-12-16 02:31:21,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:31:21,866 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 1095 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:21,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 1389 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1419 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-16 02:31:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-12-16 02:31:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-12-16 02:31:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 372 states have (on average 1.575268817204301) internal successors, (586), 374 states have internal predecessors, (586), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-16 02:31:21,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 642 transitions. [2021-12-16 02:31:21,884 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 642 transitions. Word has length 190 [2021-12-16 02:31:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:21,885 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 642 transitions. [2021-12-16 02:31:21,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 29.833333333333332) internal successors, (179), 4 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 642 transitions. [2021-12-16 02:31:21,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:21,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:21,886 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:21,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 02:31:21,887 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:21,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:21,887 INFO L85 PathProgramCache]: Analyzing trace with hash 419070538, now seen corresponding path program 1 times [2021-12-16 02:31:21,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:21,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343375277] [2021-12-16 02:31:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:21,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:21,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:21,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:21,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:22,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:22,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:22,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:22,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:22,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343375277] [2021-12-16 02:31:22,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343375277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:22,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:22,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:22,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621140364] [2021-12-16 02:31:22,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:22,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:22,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:22,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:22,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:22,014 INFO L87 Difference]: Start difference. First operand 408 states and 642 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:23,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:23,356 INFO L93 Difference]: Finished difference Result 973 states and 1565 transitions. [2021-12-16 02:31:23,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:31:23,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:23,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:23,359 INFO L225 Difference]: With dead ends: 973 [2021-12-16 02:31:23,359 INFO L226 Difference]: Without dead ends: 587 [2021-12-16 02:31:23,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:23,360 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1375 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 1517 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:23,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 1517 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 02:31:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-12-16 02:31:23,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 408. [2021-12-16 02:31:23,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 372 states have (on average 1.5725806451612903) internal successors, (585), 374 states have internal predecessors, (585), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-16 02:31:23,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 641 transitions. [2021-12-16 02:31:23,379 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 641 transitions. Word has length 190 [2021-12-16 02:31:23,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:23,379 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 641 transitions. [2021-12-16 02:31:23,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:23,380 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 641 transitions. [2021-12-16 02:31:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:23,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:23,381 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:23,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 02:31:23,381 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:23,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:23,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1504179892, now seen corresponding path program 1 times [2021-12-16 02:31:23,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:23,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710130889] [2021-12-16 02:31:23,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:23,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:23,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:23,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:23,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:23,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:23,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:23,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:23,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710130889] [2021-12-16 02:31:23,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710130889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:23,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:23,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:23,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870669940] [2021-12-16 02:31:23,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:23,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:23,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:23,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:23,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:23,506 INFO L87 Difference]: Start difference. First operand 408 states and 641 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:24,792 INFO L93 Difference]: Finished difference Result 971 states and 1559 transitions. [2021-12-16 02:31:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:31:24,793 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:24,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:24,795 INFO L225 Difference]: With dead ends: 971 [2021-12-16 02:31:24,795 INFO L226 Difference]: Without dead ends: 585 [2021-12-16 02:31:24,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:24,797 INFO L933 BasicCegarLoop]: 654 mSDtfsCounter, 1473 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:24,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 1458 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-16 02:31:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-12-16 02:31:24,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 408. [2021-12-16 02:31:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 372 states have (on average 1.5698924731182795) internal successors, (584), 374 states have internal predecessors, (584), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-16 02:31:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 640 transitions. [2021-12-16 02:31:24,817 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 640 transitions. Word has length 190 [2021-12-16 02:31:24,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:24,817 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 640 transitions. [2021-12-16 02:31:24,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 640 transitions. [2021-12-16 02:31:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:24,818 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:24,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:24,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 02:31:24,819 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:24,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:24,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1066179082, now seen corresponding path program 1 times [2021-12-16 02:31:24,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:24,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721024706] [2021-12-16 02:31:24,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:24,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:24,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:24,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:24,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:24,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:24,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:24,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:24,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:24,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721024706] [2021-12-16 02:31:24,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721024706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:24,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:24,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:24,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940094138] [2021-12-16 02:31:24,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:24,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:24,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:24,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:24,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:24,937 INFO L87 Difference]: Start difference. First operand 408 states and 640 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:26,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:26,162 INFO L93 Difference]: Finished difference Result 943 states and 1504 transitions. [2021-12-16 02:31:26,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:31:26,163 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:26,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:26,165 INFO L225 Difference]: With dead ends: 943 [2021-12-16 02:31:26,165 INFO L226 Difference]: Without dead ends: 557 [2021-12-16 02:31:26,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:31:26,166 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 1370 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 1454 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:26,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 1454 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 02:31:26,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2021-12-16 02:31:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 408. [2021-12-16 02:31:26,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 372 states have (on average 1.5618279569892473) internal successors, (581), 374 states have internal predecessors, (581), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-16 02:31:26,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 637 transitions. [2021-12-16 02:31:26,187 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 637 transitions. Word has length 190 [2021-12-16 02:31:26,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:26,187 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 637 transitions. [2021-12-16 02:31:26,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:26,188 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 637 transitions. [2021-12-16 02:31:26,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:26,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:26,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:26,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 02:31:26,189 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:26,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:26,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1836745074, now seen corresponding path program 1 times [2021-12-16 02:31:26,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:26,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095253664] [2021-12-16 02:31:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:26,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:26,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:26,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:26,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:26,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:26,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:26,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:26,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:26,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095253664] [2021-12-16 02:31:26,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095253664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:26,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:26,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:31:26,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358938275] [2021-12-16 02:31:26,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:26,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:31:26,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:26,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:31:26,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:26,325 INFO L87 Difference]: Start difference. First operand 408 states and 637 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:28,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:28,931 INFO L93 Difference]: Finished difference Result 1524 states and 2438 transitions. [2021-12-16 02:31:28,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 02:31:28,932 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:28,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:28,936 INFO L225 Difference]: With dead ends: 1524 [2021-12-16 02:31:28,936 INFO L226 Difference]: Without dead ends: 1138 [2021-12-16 02:31:28,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:31:28,937 INFO L933 BasicCegarLoop]: 1073 mSDtfsCounter, 2165 mSDsluCounter, 2444 mSDsCounter, 0 mSdLazyCounter, 3018 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2186 SdHoareTripleChecker+Valid, 3517 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:28,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2186 Valid, 3517 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3018 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-16 02:31:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-12-16 02:31:28,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 812. [2021-12-16 02:31:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 746 states have (on average 1.5723860589812333) internal successors, (1173), 749 states have internal predecessors, (1173), 52 states have call successors, (52), 13 states have call predecessors, (52), 13 states have return successors, (53), 51 states have call predecessors, (53), 50 states have call successors, (53) [2021-12-16 02:31:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1278 transitions. [2021-12-16 02:31:28,988 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1278 transitions. Word has length 190 [2021-12-16 02:31:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:28,988 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1278 transitions. [2021-12-16 02:31:28,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:28,989 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1278 transitions. [2021-12-16 02:31:28,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:28,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:28,990 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:28,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 02:31:28,990 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:28,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:28,991 INFO L85 PathProgramCache]: Analyzing trace with hash -432875888, now seen corresponding path program 1 times [2021-12-16 02:31:28,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:28,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444049262] [2021-12-16 02:31:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:28,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:29,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:29,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:29,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:29,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:29,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:29,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:29,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:29,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:29,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444049262] [2021-12-16 02:31:29,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444049262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:29,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:29,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:31:29,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199373739] [2021-12-16 02:31:29,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:29,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:31:29,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:29,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:31:29,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:29,141 INFO L87 Difference]: Start difference. First operand 812 states and 1278 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:31,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:31,772 INFO L93 Difference]: Finished difference Result 3101 states and 4996 transitions. [2021-12-16 02:31:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 02:31:31,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:31,781 INFO L225 Difference]: With dead ends: 3101 [2021-12-16 02:31:31,781 INFO L226 Difference]: Without dead ends: 2311 [2021-12-16 02:31:31,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:31:31,784 INFO L933 BasicCegarLoop]: 1066 mSDtfsCounter, 2158 mSDsluCounter, 2441 mSDsCounter, 0 mSdLazyCounter, 3008 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2179 SdHoareTripleChecker+Valid, 3507 SdHoareTripleChecker+Invalid, 3131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:31,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2179 Valid, 3507 Invalid, 3131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3008 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-16 02:31:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2021-12-16 02:31:31,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 1665. [2021-12-16 02:31:31,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1537 states have (on average 1.5875081327260898) internal successors, (2440), 1544 states have internal predecessors, (2440), 98 states have call successors, (98), 25 states have call predecessors, (98), 29 states have return successors, (111), 99 states have call predecessors, (111), 96 states have call successors, (111) [2021-12-16 02:31:31,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2649 transitions. [2021-12-16 02:31:31,907 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2649 transitions. Word has length 190 [2021-12-16 02:31:31,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:31,907 INFO L470 AbstractCegarLoop]: Abstraction has 1665 states and 2649 transitions. [2021-12-16 02:31:31,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:31,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2649 transitions. [2021-12-16 02:31:31,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:31,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:31,910 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:31,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 02:31:31,910 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:31,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:31,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1218873778, now seen corresponding path program 1 times [2021-12-16 02:31:31,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:31,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691314302] [2021-12-16 02:31:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:31,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:31,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:31,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:31,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:31,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:32,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:32,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:32,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:32,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:32,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:32,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691314302] [2021-12-16 02:31:32,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691314302] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:32,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:32,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:32,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399803403] [2021-12-16 02:31:32,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:32,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:32,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:32,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:32,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:32,046 INFO L87 Difference]: Start difference. First operand 1665 states and 2649 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:33,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:33,368 INFO L93 Difference]: Finished difference Result 4102 states and 6663 transitions. [2021-12-16 02:31:33,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:31:33,369 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:33,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:33,376 INFO L225 Difference]: With dead ends: 4102 [2021-12-16 02:31:33,376 INFO L226 Difference]: Without dead ends: 2459 [2021-12-16 02:31:33,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:33,380 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 1366 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1387 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:33,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1387 Valid, 1489 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 02:31:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-12-16 02:31:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1665. [2021-12-16 02:31:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1537 states have (on average 1.5849056603773586) internal successors, (2436), 1544 states have internal predecessors, (2436), 98 states have call successors, (98), 25 states have call predecessors, (98), 29 states have return successors, (111), 99 states have call predecessors, (111), 96 states have call successors, (111) [2021-12-16 02:31:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2645 transitions. [2021-12-16 02:31:33,472 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2645 transitions. Word has length 190 [2021-12-16 02:31:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:33,472 INFO L470 AbstractCegarLoop]: Abstraction has 1665 states and 2645 transitions. [2021-12-16 02:31:33,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:33,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2645 transitions. [2021-12-16 02:31:33,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:33,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:33,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:33,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 02:31:33,475 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:33,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:33,475 INFO L85 PathProgramCache]: Analyzing trace with hash -551491888, now seen corresponding path program 1 times [2021-12-16 02:31:33,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:33,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73380169] [2021-12-16 02:31:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:33,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:33,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:33,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:33,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:33,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:33,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:33,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:33,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73380169] [2021-12-16 02:31:33,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73380169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:33,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:33,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:33,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134367881] [2021-12-16 02:31:33,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:33,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:33,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:33,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:33,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:33,603 INFO L87 Difference]: Start difference. First operand 1665 states and 2645 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:35,079 INFO L93 Difference]: Finished difference Result 4093 states and 6633 transitions. [2021-12-16 02:31:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:31:35,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:35,087 INFO L225 Difference]: With dead ends: 4093 [2021-12-16 02:31:35,087 INFO L226 Difference]: Without dead ends: 2450 [2021-12-16 02:31:35,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:35,092 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 1186 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1558 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 1697 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:35,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 1697 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1558 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 02:31:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2450 states. [2021-12-16 02:31:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2450 to 1665. [2021-12-16 02:31:35,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1665 states, 1537 states have (on average 1.5823031880286271) internal successors, (2432), 1544 states have internal predecessors, (2432), 98 states have call successors, (98), 25 states have call predecessors, (98), 29 states have return successors, (111), 99 states have call predecessors, (111), 96 states have call successors, (111) [2021-12-16 02:31:35,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1665 states to 1665 states and 2641 transitions. [2021-12-16 02:31:35,190 INFO L78 Accepts]: Start accepts. Automaton has 1665 states and 2641 transitions. Word has length 190 [2021-12-16 02:31:35,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:35,190 INFO L470 AbstractCegarLoop]: Abstraction has 1665 states and 2641 transitions. [2021-12-16 02:31:35,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:35,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1665 states and 2641 transitions. [2021-12-16 02:31:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:35,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:35,192 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:35,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 02:31:35,192 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:35,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:35,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1548246542, now seen corresponding path program 1 times [2021-12-16 02:31:35,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:35,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495588179] [2021-12-16 02:31:35,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:35,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:35,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:35,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:35,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:35,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:35,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495588179] [2021-12-16 02:31:35,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495588179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:35,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:35,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:31:35,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446795499] [2021-12-16 02:31:35,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:35,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:31:35,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:35,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:31:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:35,303 INFO L87 Difference]: Start difference. First operand 1665 states and 2641 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:38,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:38,417 INFO L93 Difference]: Finished difference Result 6401 states and 10365 transitions. [2021-12-16 02:31:38,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 02:31:38,418 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:38,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:38,445 INFO L225 Difference]: With dead ends: 6401 [2021-12-16 02:31:38,445 INFO L226 Difference]: Without dead ends: 4758 [2021-12-16 02:31:38,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:31:38,450 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 1811 mSDsluCounter, 2836 mSDsCounter, 0 mSdLazyCounter, 3288 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1832 SdHoareTripleChecker+Valid, 3886 SdHoareTripleChecker+Invalid, 3381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 3288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:38,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1832 Valid, 3886 Invalid, 3381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 3288 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-16 02:31:38,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4758 states. [2021-12-16 02:31:38,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4758 to 3482. [2021-12-16 02:31:38,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3482 states, 3224 states have (on average 1.6004962779156326) internal successors, (5160), 3245 states have internal predecessors, (5160), 190 states have call successors, (190), 49 states have call predecessors, (190), 67 states have return successors, (251), 195 states have call predecessors, (251), 188 states have call successors, (251) [2021-12-16 02:31:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3482 states to 3482 states and 5601 transitions. [2021-12-16 02:31:38,663 INFO L78 Accepts]: Start accepts. Automaton has 3482 states and 5601 transitions. Word has length 190 [2021-12-16 02:31:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:38,664 INFO L470 AbstractCegarLoop]: Abstraction has 3482 states and 5601 transitions. [2021-12-16 02:31:38,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:38,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3482 states and 5601 transitions. [2021-12-16 02:31:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:38,666 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:38,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:38,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-16 02:31:38,667 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1893074704, now seen corresponding path program 1 times [2021-12-16 02:31:38,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:38,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019835354] [2021-12-16 02:31:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:38,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:38,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:38,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019835354] [2021-12-16 02:31:38,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019835354] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:38,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:38,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:31:38,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210847319] [2021-12-16 02:31:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:38,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:31:38,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:38,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:31:38,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:38,801 INFO L87 Difference]: Start difference. First operand 3482 states and 5601 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:41,640 INFO L93 Difference]: Finished difference Result 13449 states and 22077 transitions. [2021-12-16 02:31:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 02:31:41,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:41,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:41,668 INFO L225 Difference]: With dead ends: 13449 [2021-12-16 02:31:41,668 INFO L226 Difference]: Without dead ends: 9989 [2021-12-16 02:31:41,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:31:41,678 INFO L933 BasicCegarLoop]: 747 mSDtfsCounter, 2281 mSDsluCounter, 1579 mSDsCounter, 0 mSdLazyCounter, 2651 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2302 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 2852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:41,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2302 Valid, 2326 Invalid, 2852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2651 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-16 02:31:41,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2021-12-16 02:31:42,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 7449. [2021-12-16 02:31:42,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7449 states, 6913 states have (on average 1.6236076956458845) internal successors, (11224), 6980 states have internal predecessors, (11224), 374 states have call successors, (374), 97 states have call predecessors, (374), 161 states have return successors, (627), 387 states have call predecessors, (627), 372 states have call successors, (627) [2021-12-16 02:31:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7449 states to 7449 states and 12225 transitions. [2021-12-16 02:31:42,137 INFO L78 Accepts]: Start accepts. Automaton has 7449 states and 12225 transitions. Word has length 190 [2021-12-16 02:31:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:42,137 INFO L470 AbstractCegarLoop]: Abstraction has 7449 states and 12225 transitions. [2021-12-16 02:31:42,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 7449 states and 12225 transitions. [2021-12-16 02:31:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:42,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:42,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:42,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-16 02:31:42,142 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:42,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:42,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1420937778, now seen corresponding path program 1 times [2021-12-16 02:31:42,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:42,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798129077] [2021-12-16 02:31:42,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:42,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:42,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:42,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798129077] [2021-12-16 02:31:42,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798129077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:42,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:42,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:42,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786947548] [2021-12-16 02:31:42,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:42,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:42,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:42,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:42,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:42,276 INFO L87 Difference]: Start difference. First operand 7449 states and 12225 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:44,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:44,184 INFO L93 Difference]: Finished difference Result 18718 states and 31347 transitions. [2021-12-16 02:31:44,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:31:44,184 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:44,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:44,210 INFO L225 Difference]: With dead ends: 18718 [2021-12-16 02:31:44,210 INFO L226 Difference]: Without dead ends: 11291 [2021-12-16 02:31:44,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:44,225 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 1188 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:44,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1209 Valid, 1685 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-16 02:31:44,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11291 states. [2021-12-16 02:31:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11291 to 7449. [2021-12-16 02:31:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7449 states, 6913 states have (on average 1.6212932156806017) internal successors, (11208), 6980 states have internal predecessors, (11208), 374 states have call successors, (374), 97 states have call predecessors, (374), 161 states have return successors, (627), 387 states have call predecessors, (627), 372 states have call successors, (627) [2021-12-16 02:31:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7449 states to 7449 states and 12209 transitions. [2021-12-16 02:31:44,722 INFO L78 Accepts]: Start accepts. Automaton has 7449 states and 12209 transitions. Word has length 190 [2021-12-16 02:31:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:44,722 INFO L470 AbstractCegarLoop]: Abstraction has 7449 states and 12209 transitions. [2021-12-16 02:31:44,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 7449 states and 12209 transitions. [2021-12-16 02:31:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:44,726 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:44,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:44,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-16 02:31:44,726 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:44,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:44,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1104557904, now seen corresponding path program 1 times [2021-12-16 02:31:44,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:44,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966532441] [2021-12-16 02:31:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:44,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:44,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:44,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:44,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966532441] [2021-12-16 02:31:44,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966532441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:44,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:44,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:31:44,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616659188] [2021-12-16 02:31:44,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:44,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:31:44,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:44,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:31:44,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:44,854 INFO L87 Difference]: Start difference. First operand 7449 states and 12209 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:48,516 INFO L93 Difference]: Finished difference Result 28621 states and 47817 transitions. [2021-12-16 02:31:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 02:31:48,517 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:48,577 INFO L225 Difference]: With dead ends: 28621 [2021-12-16 02:31:48,578 INFO L226 Difference]: Without dead ends: 21194 [2021-12-16 02:31:48,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:31:48,605 INFO L933 BasicCegarLoop]: 1030 mSDtfsCounter, 2128 mSDsluCounter, 2441 mSDsCounter, 0 mSdLazyCounter, 2895 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2149 SdHoareTripleChecker+Valid, 3471 SdHoareTripleChecker+Invalid, 3022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 2895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:48,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2149 Valid, 3471 Invalid, 3022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 2895 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-16 02:31:48,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21194 states. [2021-12-16 02:31:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21194 to 16166. [2021-12-16 02:31:49,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16166 states, 15020 states have (on average 1.6455392809587217) internal successors, (24716), 15233 states have internal predecessors, (24716), 742 states have call successors, (742), 193 states have call predecessors, (742), 403 states have return successors, (1763), 771 states have call predecessors, (1763), 740 states have call successors, (1763) [2021-12-16 02:31:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16166 states to 16166 states and 27221 transitions. [2021-12-16 02:31:49,578 INFO L78 Accepts]: Start accepts. Automaton has 16166 states and 27221 transitions. Word has length 190 [2021-12-16 02:31:49,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:49,579 INFO L470 AbstractCegarLoop]: Abstraction has 16166 states and 27221 transitions. [2021-12-16 02:31:49,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 16166 states and 27221 transitions. [2021-12-16 02:31:49,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:49,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:49,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:49,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-16 02:31:49,585 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:49,585 INFO L85 PathProgramCache]: Analyzing trace with hash -300633774, now seen corresponding path program 1 times [2021-12-16 02:31:49,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:49,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079317398] [2021-12-16 02:31:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:49,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:49,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:49,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079317398] [2021-12-16 02:31:49,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079317398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:49,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:49,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:31:49,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883962178] [2021-12-16 02:31:49,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:49,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:31:49,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:31:49,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:49,698 INFO L87 Difference]: Start difference. First operand 16166 states and 27221 transitions. Second operand has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:56,066 INFO L93 Difference]: Finished difference Result 68225 states and 116379 transitions. [2021-12-16 02:31:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 02:31:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:31:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:56,229 INFO L225 Difference]: With dead ends: 68225 [2021-12-16 02:31:56,229 INFO L226 Difference]: Without dead ends: 52081 [2021-12-16 02:31:56,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-12-16 02:31:56,282 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 2315 mSDsluCounter, 2824 mSDsCounter, 0 mSdLazyCounter, 3193 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2351 SdHoareTripleChecker+Valid, 3848 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 3193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:56,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2351 Valid, 3848 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 3193 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-16 02:31:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52081 states. [2021-12-16 02:31:58,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52081 to 35853. [2021-12-16 02:31:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35853 states, 33357 states have (on average 1.6747309410318674) internal successors, (55864), 34024 states have internal predecessors, (55864), 1446 states have call successors, (1446), 385 states have call predecessors, (1446), 1049 states have return successors, (5539), 1507 states have call predecessors, (5539), 1444 states have call successors, (5539) [2021-12-16 02:31:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35853 states to 35853 states and 62849 transitions. [2021-12-16 02:31:58,454 INFO L78 Accepts]: Start accepts. Automaton has 35853 states and 62849 transitions. Word has length 190 [2021-12-16 02:31:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:58,455 INFO L470 AbstractCegarLoop]: Abstraction has 35853 states and 62849 transitions. [2021-12-16 02:31:58,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.375) internal successors, (179), 6 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:58,455 INFO L276 IsEmpty]: Start isEmpty. Operand 35853 states and 62849 transitions. [2021-12-16 02:31:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:31:58,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:58,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:58,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-16 02:31:58,464 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:58,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1593700112, now seen corresponding path program 1 times [2021-12-16 02:31:58,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:58,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815764237] [2021-12-16 02:31:58,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:58,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:31:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:31:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:31:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:58,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:58,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815764237] [2021-12-16 02:31:58,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815764237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:58,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:58,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:58,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574616112] [2021-12-16 02:31:58,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:58,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:58,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:58,572 INFO L87 Difference]: Start difference. First operand 35853 states and 62849 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:32:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:02,601 INFO L93 Difference]: Finished difference Result 91426 states and 163827 transitions. [2021-12-16 02:32:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:32:02,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 190 [2021-12-16 02:32:02,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:02,778 INFO L225 Difference]: With dead ends: 91426 [2021-12-16 02:32:02,778 INFO L226 Difference]: Without dead ends: 55595 [2021-12-16 02:32:02,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:32:02,866 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 1363 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:02,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1384 Valid, 1459 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-16 02:32:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55595 states. [2021-12-16 02:32:05,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55595 to 35853. [2021-12-16 02:32:05,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35853 states, 33357 states have (on average 1.672812303264682) internal successors, (55800), 34024 states have internal predecessors, (55800), 1446 states have call successors, (1446), 385 states have call predecessors, (1446), 1049 states have return successors, (5539), 1507 states have call predecessors, (5539), 1444 states have call successors, (5539) [2021-12-16 02:32:05,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35853 states to 35853 states and 62785 transitions. [2021-12-16 02:32:05,608 INFO L78 Accepts]: Start accepts. Automaton has 35853 states and 62785 transitions. Word has length 190 [2021-12-16 02:32:05,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:05,608 INFO L470 AbstractCegarLoop]: Abstraction has 35853 states and 62785 transitions. [2021-12-16 02:32:05,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:32:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 35853 states and 62785 transitions. [2021-12-16 02:32:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-16 02:32:05,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:05,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:05,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-16 02:32:05,618 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:05,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:05,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1254686318, now seen corresponding path program 1 times [2021-12-16 02:32:05,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:05,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156420350] [2021-12-16 02:32:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:05,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 02:32:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-16 02:32:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-16 02:32:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:32:05,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:05,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156420350] [2021-12-16 02:32:05,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156420350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:05,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:32:05,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:32:05,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582423990] [2021-12-16 02:32:05,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:05,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:32:05,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:32:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:32:05,726 INFO L87 Difference]: Start difference. First operand 35853 states and 62785 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 5 states have internal predecessors, (179), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)