./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY --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 c5f603027c62ff37561a520351662dbe2fd253b52e04e36028cb9a624978ef8e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:51:41,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:51:41,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:51:41,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:51:41,343 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:51:41,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:51:41,352 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:51:41,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:51:41,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:51:41,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:51:41,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:51:41,370 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:51:41,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:51:41,374 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:51:41,377 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:51:41,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:51:41,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:51:41,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:51:41,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:51:41,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:51:41,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:51:41,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:51:41,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:51:41,408 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:51:41,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:51:41,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:51:41,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:51:41,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:51:41,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:51:41,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:51:41,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:51:41,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:51:41,422 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:51:41,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:51:41,425 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:51:41,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:51:41,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:51:41,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:51:41,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:51:41,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:51:41,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:51:41,430 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:51:41,484 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:51:41,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:51:41,486 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:51:41,486 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:51:41,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:51:41,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:51:41,496 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:51:41,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:51:41,497 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:51:41,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:51:41,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:51:41,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:51:41,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:51:41,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:51:41,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:51:41,500 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:51:41,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:51:41,500 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:51:41,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:51:41,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:51:41,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:51:41,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:51:41,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:51:41,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:51:41,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:51:41,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:51:41,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:51:41,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:51:41,503 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:51:41,505 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:51:41,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:51:41,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:51:41,506 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c5f603027c62ff37561a520351662dbe2fd253b52e04e36028cb9a624978ef8e [2021-11-07 07:51:41,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:51:41,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:51:41,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:51:41,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:51:41,921 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:51:41,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2021-11-07 07:51:42,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/data/3c5ac9120/125e16abaddb4a94948f2faf25b0c9a2/FLAGb219727b9 [2021-11-07 07:51:42,659 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:51:42,660 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/sv-benchmarks/c/systemc/token_ring.11.cil-2.c [2021-11-07 07:51:42,678 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/data/3c5ac9120/125e16abaddb4a94948f2faf25b0c9a2/FLAGb219727b9 [2021-11-07 07:51:42,922 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/data/3c5ac9120/125e16abaddb4a94948f2faf25b0c9a2 [2021-11-07 07:51:42,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:51:42,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:51:42,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:51:42,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:51:42,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:51:42,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:51:42" (1/1) ... [2021-11-07 07:51:42,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4560a0b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:42, skipping insertion in model container [2021-11-07 07:51:42,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:51:42" (1/1) ... [2021-11-07 07:51:42,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:51:43,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:51:43,204 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/sv-benchmarks/c/systemc/token_ring.11.cil-2.c[671,684] [2021-11-07 07:51:43,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:51:43,400 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:51:43,413 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/sv-benchmarks/c/systemc/token_ring.11.cil-2.c[671,684] [2021-11-07 07:51:43,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:51:43,527 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:51:43,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43 WrapperNode [2021-11-07 07:51:43,528 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:51:43,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:51:43,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:51:43,530 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:51:43,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (1/1) ... [2021-11-07 07:51:43,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (1/1) ... [2021-11-07 07:51:43,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:51:43,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:51:43,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:51:43,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:51:43,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (1/1) ... [2021-11-07 07:51:43,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (1/1) ... [2021-11-07 07:51:43,829 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (1/1) ... [2021-11-07 07:51:43,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (1/1) ... [2021-11-07 07:51:43,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (1/1) ... [2021-11-07 07:51:43,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (1/1) ... [2021-11-07 07:51:43,968 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (1/1) ... [2021-11-07 07:51:43,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:51:43,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:51:43,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:51:43,985 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:51:43,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (1/1) ... [2021-11-07 07:51:43,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:51:44,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:51:44,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:51:44,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_54438d48-a0f3-4d79-9e93-5d12ec6aa2ed/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:51:44,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:51:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:51:44,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:51:44,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:51:47,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:51:47,264 INFO L299 CfgBuilder]: Removed 490 assume(true) statements. [2021-11-07 07:51:47,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:51:47 BoogieIcfgContainer [2021-11-07 07:51:47,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:51:47,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:51:47,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:51:47,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:51:47,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:51:42" (1/3) ... [2021-11-07 07:51:47,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675e4c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:51:47, skipping insertion in model container [2021-11-07 07:51:47,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:51:43" (2/3) ... [2021-11-07 07:51:47,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@675e4c19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:51:47, skipping insertion in model container [2021-11-07 07:51:47,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:51:47" (3/3) ... [2021-11-07 07:51:47,281 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-2.c [2021-11-07 07:51:47,287 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:51:47,288 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:51:47,362 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:51:47,370 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 [2021-11-07 07:51:47,371 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:51:47,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 1541 states, 1539 states have (on average 1.5133203378817415) internal successors, (2329), 1540 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:47,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:47,451 INFO L513 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] [2021-11-07 07:51:47,451 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:47,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:47,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1376939346, now seen corresponding path program 1 times [2021-11-07 07:51:47,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:47,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982574747] [2021-11-07 07:51:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:47,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:47,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:47,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982574747] [2021-11-07 07:51:47,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982574747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:47,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:47,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:51:47,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96911186] [2021-11-07 07:51:47,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:47,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:47,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:47,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:47,820 INFO L87 Difference]: Start difference. First operand has 1541 states, 1539 states have (on average 1.5133203378817415) internal successors, (2329), 1540 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:48,086 INFO L93 Difference]: Finished difference Result 3077 states and 4651 transitions. [2021-11-07 07:51:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:48,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:48,137 INFO L225 Difference]: With dead ends: 3077 [2021-11-07 07:51:48,137 INFO L226 Difference]: Without dead ends: 1537 [2021-11-07 07:51:48,146 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:48,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-11-07 07:51:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1537. [2021-11-07 07:51:48,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.494140625) internal successors, (2295), 1536 states have internal predecessors, (2295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2295 transitions. [2021-11-07 07:51:48,346 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2295 transitions. Word has length 149 [2021-11-07 07:51:48,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:48,347 INFO L470 AbstractCegarLoop]: Abstraction has 1537 states and 2295 transitions. [2021-11-07 07:51:48,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:48,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2295 transitions. [2021-11-07 07:51:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:48,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:48,365 INFO L513 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] [2021-11-07 07:51:48,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:51:48,371 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:48,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:48,377 INFO L85 PathProgramCache]: Analyzing trace with hash -520040112, now seen corresponding path program 1 times [2021-11-07 07:51:48,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:48,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142140678] [2021-11-07 07:51:48,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:48,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:48,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:48,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142140678] [2021-11-07 07:51:48,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142140678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:48,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:48,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:51:48,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958683060] [2021-11-07 07:51:48,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:48,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:48,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:48,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:48,547 INFO L87 Difference]: Start difference. First operand 1537 states and 2295 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:48,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:48,667 INFO L93 Difference]: Finished difference Result 3061 states and 4568 transitions. [2021-11-07 07:51:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:48,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:48,681 INFO L225 Difference]: With dead ends: 3061 [2021-11-07 07:51:48,681 INFO L226 Difference]: Without dead ends: 1537 [2021-11-07 07:51:48,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1537 states. [2021-11-07 07:51:48,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1537 to 1537. [2021-11-07 07:51:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.4934895833333333) internal successors, (2294), 1536 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:48,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2294 transitions. [2021-11-07 07:51:48,772 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2294 transitions. Word has length 149 [2021-11-07 07:51:48,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:48,773 INFO L470 AbstractCegarLoop]: Abstraction has 1537 states and 2294 transitions. [2021-11-07 07:51:48,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:48,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2294 transitions. [2021-11-07 07:51:48,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:48,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:48,777 INFO L513 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] [2021-11-07 07:51:48,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 07:51:48,778 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:48,779 INFO L85 PathProgramCache]: Analyzing trace with hash -589687986, now seen corresponding path program 1 times [2021-11-07 07:51:48,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:48,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645205732] [2021-11-07 07:51:48,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:48,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:48,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:48,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645205732] [2021-11-07 07:51:48,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645205732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:48,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:48,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:48,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383758386] [2021-11-07 07:51:48,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:48,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:48,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:48,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:48,978 INFO L87 Difference]: Start difference. First operand 1537 states and 2294 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:49,181 INFO L93 Difference]: Finished difference Result 4363 states and 6492 transitions. [2021-11-07 07:51:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:49,182 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:49,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:49,202 INFO L225 Difference]: With dead ends: 4363 [2021-11-07 07:51:49,203 INFO L226 Difference]: Without dead ends: 2842 [2021-11-07 07:51:49,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2021-11-07 07:51:49,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2840. [2021-11-07 07:51:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4864388869320184) internal successors, (4220), 2839 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4220 transitions. [2021-11-07 07:51:49,362 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4220 transitions. Word has length 149 [2021-11-07 07:51:49,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:49,362 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4220 transitions. [2021-11-07 07:51:49,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:49,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4220 transitions. [2021-11-07 07:51:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:49,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:49,369 INFO L513 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] [2021-11-07 07:51:49,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 07:51:49,370 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:49,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:49,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1058479562, now seen corresponding path program 1 times [2021-11-07 07:51:49,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:49,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125134411] [2021-11-07 07:51:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:49,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:49,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:49,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125134411] [2021-11-07 07:51:49,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125134411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:49,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:49,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:49,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577375974] [2021-11-07 07:51:49,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:49,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:49,522 INFO L87 Difference]: Start difference. First operand 2840 states and 4220 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:49,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:49,726 INFO L93 Difference]: Finished difference Result 5663 states and 8412 transitions. [2021-11-07 07:51:49,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:49,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:49,747 INFO L225 Difference]: With dead ends: 5663 [2021-11-07 07:51:49,748 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:49,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:49,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4836209933075026) internal successors, (4212), 2839 states have internal predecessors, (4212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4212 transitions. [2021-11-07 07:51:49,916 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4212 transitions. Word has length 149 [2021-11-07 07:51:49,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:49,917 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4212 transitions. [2021-11-07 07:51:49,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:49,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4212 transitions. [2021-11-07 07:51:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:49,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:49,920 INFO L513 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] [2021-11-07 07:51:49,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 07:51:49,922 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:49,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2081477582, now seen corresponding path program 1 times [2021-11-07 07:51:49,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:49,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70086028] [2021-11-07 07:51:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:49,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:50,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:50,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:50,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70086028] [2021-11-07 07:51:50,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70086028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:50,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:50,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:50,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927431056] [2021-11-07 07:51:50,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:50,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:50,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:50,046 INFO L87 Difference]: Start difference. First operand 2840 states and 4212 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:50,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:50,248 INFO L93 Difference]: Finished difference Result 5662 states and 8395 transitions. [2021-11-07 07:51:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:50,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:50,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:50,270 INFO L225 Difference]: With dead ends: 5662 [2021-11-07 07:51:50,270 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:50,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:50,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:50,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.480803099682987) internal successors, (4204), 2839 states have internal predecessors, (4204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:50,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4204 transitions. [2021-11-07 07:51:50,457 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4204 transitions. Word has length 149 [2021-11-07 07:51:50,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:50,459 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4204 transitions. [2021-11-07 07:51:50,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:50,459 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4204 transitions. [2021-11-07 07:51:50,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:50,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:50,462 INFO L513 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] [2021-11-07 07:51:50,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 07:51:50,463 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1975930186, now seen corresponding path program 1 times [2021-11-07 07:51:50,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:50,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210005983] [2021-11-07 07:51:50,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:50,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:50,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:50,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210005983] [2021-11-07 07:51:50,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210005983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:50,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:50,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:50,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341717222] [2021-11-07 07:51:50,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:50,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:50,592 INFO L87 Difference]: Start difference. First operand 2840 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:50,807 INFO L93 Difference]: Finished difference Result 5661 states and 8378 transitions. [2021-11-07 07:51:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:50,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:50,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:50,836 INFO L225 Difference]: With dead ends: 5661 [2021-11-07 07:51:50,836 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:50,842 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:50,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:51,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:51,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4779852060584713) internal successors, (4196), 2839 states have internal predecessors, (4196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4196 transitions. [2021-11-07 07:51:51,024 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4196 transitions. Word has length 149 [2021-11-07 07:51:51,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:51,025 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4196 transitions. [2021-11-07 07:51:51,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4196 transitions. [2021-11-07 07:51:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:51,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:51,028 INFO L513 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] [2021-11-07 07:51:51,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 07:51:51,029 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash 587052110, now seen corresponding path program 1 times [2021-11-07 07:51:51,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:51,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402286579] [2021-11-07 07:51:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:51,031 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:51,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:51,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402286579] [2021-11-07 07:51:51,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402286579] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:51,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:51,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:51,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832595001] [2021-11-07 07:51:51,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:51,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:51,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:51,084 INFO L87 Difference]: Start difference. First operand 2840 states and 4196 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:51,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:51,284 INFO L93 Difference]: Finished difference Result 5660 states and 8361 transitions. [2021-11-07 07:51:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:51,304 INFO L225 Difference]: With dead ends: 5660 [2021-11-07 07:51:51,304 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:51,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:51,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:51,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4751673124339557) internal successors, (4188), 2839 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4188 transitions. [2021-11-07 07:51:51,486 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4188 transitions. Word has length 149 [2021-11-07 07:51:51,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:51,487 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4188 transitions. [2021-11-07 07:51:51,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4188 transitions. [2021-11-07 07:51:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:51,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:51,490 INFO L513 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] [2021-11-07 07:51:51,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 07:51:51,491 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:51,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:51,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1262212236, now seen corresponding path program 1 times [2021-11-07 07:51:51,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:51,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451655201] [2021-11-07 07:51:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:51,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:51,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:51,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451655201] [2021-11-07 07:51:51,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451655201] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:51,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:51,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:51,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044202028] [2021-11-07 07:51:51,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:51,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:51,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:51,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:51,543 INFO L87 Difference]: Start difference. First operand 2840 states and 4188 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:51,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:51,717 INFO L93 Difference]: Finished difference Result 5658 states and 8342 transitions. [2021-11-07 07:51:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:51,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:51,739 INFO L225 Difference]: With dead ends: 5658 [2021-11-07 07:51:51,739 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:51,745 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:51,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:51,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:51,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.47234941880944) internal successors, (4180), 2839 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4180 transitions. [2021-11-07 07:51:51,956 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4180 transitions. Word has length 149 [2021-11-07 07:51:51,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:51,957 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4180 transitions. [2021-11-07 07:51:51,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:51,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4180 transitions. [2021-11-07 07:51:51,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:51,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:51,960 INFO L513 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] [2021-11-07 07:51:51,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 07:51:51,961 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash 952200200, now seen corresponding path program 1 times [2021-11-07 07:51:51,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:51,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447354976] [2021-11-07 07:51:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:51,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:51,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:52,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:52,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447354976] [2021-11-07 07:51:52,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447354976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:52,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:52,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:52,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162635094] [2021-11-07 07:51:52,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:52,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:52,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:52,013 INFO L87 Difference]: Start difference. First operand 2840 states and 4180 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:52,186 INFO L93 Difference]: Finished difference Result 5657 states and 8325 transitions. [2021-11-07 07:51:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:52,206 INFO L225 Difference]: With dead ends: 5657 [2021-11-07 07:51:52,206 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:52,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:52,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4695315251849244) internal successors, (4172), 2839 states have internal predecessors, (4172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:52,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4172 transitions. [2021-11-07 07:51:52,435 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4172 transitions. Word has length 149 [2021-11-07 07:51:52,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:52,438 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4172 transitions. [2021-11-07 07:51:52,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:52,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4172 transitions. [2021-11-07 07:51:52,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:52,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:52,442 INFO L513 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] [2021-11-07 07:51:52,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 07:51:52,442 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:52,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:52,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1219294476, now seen corresponding path program 1 times [2021-11-07 07:51:52,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:52,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912076704] [2021-11-07 07:51:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:52,446 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:52,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:52,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:52,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912076704] [2021-11-07 07:51:52,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912076704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:52,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:52,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:52,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041371842] [2021-11-07 07:51:52,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:52,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:52,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:52,507 INFO L87 Difference]: Start difference. First operand 2840 states and 4172 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:52,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:52,664 INFO L93 Difference]: Finished difference Result 5656 states and 8308 transitions. [2021-11-07 07:51:52,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:52,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:52,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:52,697 INFO L225 Difference]: With dead ends: 5656 [2021-11-07 07:51:52,706 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:52,712 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:52,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:52,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4667136315604086) internal successors, (4164), 2839 states have internal predecessors, (4164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4164 transitions. [2021-11-07 07:51:52,907 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4164 transitions. Word has length 149 [2021-11-07 07:51:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:52,908 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4164 transitions. [2021-11-07 07:51:52,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4164 transitions. [2021-11-07 07:51:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:52,911 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:52,911 INFO L513 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] [2021-11-07 07:51:52,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 07:51:52,912 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:52,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:52,912 INFO L85 PathProgramCache]: Analyzing trace with hash 812268424, now seen corresponding path program 1 times [2021-11-07 07:51:52,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:52,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605763071] [2021-11-07 07:51:52,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:52,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:52,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:52,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605763071] [2021-11-07 07:51:52,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605763071] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:52,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:52,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:52,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220700182] [2021-11-07 07:51:52,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:52,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:52,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:52,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:52,968 INFO L87 Difference]: Start difference. First operand 2840 states and 4164 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:53,170 INFO L93 Difference]: Finished difference Result 5655 states and 8291 transitions. [2021-11-07 07:51:53,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:53,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:53,180 INFO L225 Difference]: With dead ends: 5655 [2021-11-07 07:51:53,180 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:53,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.463895737935893) internal successors, (4156), 2839 states have internal predecessors, (4156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4156 transitions. [2021-11-07 07:51:53,348 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4156 transitions. Word has length 149 [2021-11-07 07:51:53,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:53,348 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4156 transitions. [2021-11-07 07:51:53,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4156 transitions. [2021-11-07 07:51:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:53,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:53,351 INFO L513 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] [2021-11-07 07:51:53,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 07:51:53,352 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1491875212, now seen corresponding path program 1 times [2021-11-07 07:51:53,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:53,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677455014] [2021-11-07 07:51:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:53,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:53,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:53,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677455014] [2021-11-07 07:51:53,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677455014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:53,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:53,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:53,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650376312] [2021-11-07 07:51:53,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:53,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:53,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:53,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:53,417 INFO L87 Difference]: Start difference. First operand 2840 states and 4156 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:53,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:53,601 INFO L93 Difference]: Finished difference Result 5654 states and 8274 transitions. [2021-11-07 07:51:53,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:53,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:53,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:53,609 INFO L225 Difference]: With dead ends: 5654 [2021-11-07 07:51:53,610 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:53,615 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:53,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4610778443113772) internal successors, (4148), 2839 states have internal predecessors, (4148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:53,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4148 transitions. [2021-11-07 07:51:53,769 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4148 transitions. Word has length 149 [2021-11-07 07:51:53,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:53,770 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4148 transitions. [2021-11-07 07:51:53,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:53,770 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4148 transitions. [2021-11-07 07:51:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:53,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:53,773 INFO L513 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] [2021-11-07 07:51:53,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-07 07:51:53,773 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:53,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:53,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1929440008, now seen corresponding path program 1 times [2021-11-07 07:51:53,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:53,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227132269] [2021-11-07 07:51:53,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:53,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:53,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:53,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227132269] [2021-11-07 07:51:53,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227132269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:53,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:53,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:51:53,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927706118] [2021-11-07 07:51:53,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:51:53,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:51:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:51:53,828 INFO L87 Difference]: Start difference. First operand 2840 states and 4148 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:54,239 INFO L93 Difference]: Finished difference Result 8358 states and 12208 transitions. [2021-11-07 07:51:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:51:54,239 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:54,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:54,253 INFO L225 Difference]: With dead ends: 8358 [2021-11-07 07:51:54,253 INFO L226 Difference]: Without dead ends: 5545 [2021-11-07 07:51:54,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:51:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5545 states. [2021-11-07 07:51:54,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5545 to 2840. [2021-11-07 07:51:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4600211342021838) internal successors, (4145), 2839 states have internal predecessors, (4145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4145 transitions. [2021-11-07 07:51:54,489 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4145 transitions. Word has length 149 [2021-11-07 07:51:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:54,490 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4145 transitions. [2021-11-07 07:51:54,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4145 transitions. [2021-11-07 07:51:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:54,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:54,493 INFO L513 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] [2021-11-07 07:51:54,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 07:51:54,493 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:54,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1503693686, now seen corresponding path program 1 times [2021-11-07 07:51:54,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:54,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315267140] [2021-11-07 07:51:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:54,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:54,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:54,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315267140] [2021-11-07 07:51:54,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315267140] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:54,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:54,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:51:54,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255068874] [2021-11-07 07:51:54,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:51:54,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:51:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:51:54,549 INFO L87 Difference]: Start difference. First operand 2840 states and 4145 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:55,071 INFO L93 Difference]: Finished difference Result 8188 states and 11957 transitions. [2021-11-07 07:51:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:51:55,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:55,086 INFO L225 Difference]: With dead ends: 8188 [2021-11-07 07:51:55,086 INFO L226 Difference]: Without dead ends: 5376 [2021-11-07 07:51:55,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:51:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-11-07 07:51:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 2840. [2021-11-07 07:51:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4589644240929904) internal successors, (4142), 2839 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:55,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4142 transitions. [2021-11-07 07:51:55,336 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4142 transitions. Word has length 149 [2021-11-07 07:51:55,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:55,337 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4142 transitions. [2021-11-07 07:51:55,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:55,338 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4142 transitions. [2021-11-07 07:51:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:55,340 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:55,340 INFO L513 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] [2021-11-07 07:51:55,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-07 07:51:55,341 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:55,342 INFO L85 PathProgramCache]: Analyzing trace with hash 740864712, now seen corresponding path program 1 times [2021-11-07 07:51:55,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:55,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649200033] [2021-11-07 07:51:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:55,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:55,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:55,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649200033] [2021-11-07 07:51:55,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649200033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:55,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:55,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:55,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515945865] [2021-11-07 07:51:55,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:55,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:55,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:55,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:55,411 INFO L87 Difference]: Start difference. First operand 2840 states and 4142 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:55,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:55,770 INFO L93 Difference]: Finished difference Result 5650 states and 8241 transitions. [2021-11-07 07:51:55,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:55,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:55,779 INFO L225 Difference]: With dead ends: 5650 [2021-11-07 07:51:55,779 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:55,787 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:55,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:56,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.446988376188799) internal successors, (4108), 2839 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:56,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4108 transitions. [2021-11-07 07:51:56,071 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4108 transitions. Word has length 149 [2021-11-07 07:51:56,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:56,072 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4108 transitions. [2021-11-07 07:51:56,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:56,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4108 transitions. [2021-11-07 07:51:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:56,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:56,075 INFO L513 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] [2021-11-07 07:51:56,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-07 07:51:56,076 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:56,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:56,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1947771269, now seen corresponding path program 1 times [2021-11-07 07:51:56,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:56,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111718649] [2021-11-07 07:51:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:56,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:56,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:56,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111718649] [2021-11-07 07:51:56,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111718649] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:56,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:56,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:56,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347322517] [2021-11-07 07:51:56,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:56,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:56,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:56,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:56,155 INFO L87 Difference]: Start difference. First operand 2840 states and 4108 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:56,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:56,459 INFO L93 Difference]: Finished difference Result 5649 states and 8172 transitions. [2021-11-07 07:51:56,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:56,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:56,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:56,468 INFO L225 Difference]: With dead ends: 5649 [2021-11-07 07:51:56,468 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:56,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:56,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:56,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4350123282846072) internal successors, (4074), 2839 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4074 transitions. [2021-11-07 07:51:56,736 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4074 transitions. Word has length 149 [2021-11-07 07:51:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:56,736 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4074 transitions. [2021-11-07 07:51:56,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4074 transitions. [2021-11-07 07:51:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:56,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:56,739 INFO L513 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] [2021-11-07 07:51:56,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-07 07:51:56,740 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:56,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:56,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1994280586, now seen corresponding path program 1 times [2021-11-07 07:51:56,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:56,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935800025] [2021-11-07 07:51:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:56,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:56,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:56,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935800025] [2021-11-07 07:51:56,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935800025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:56,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:56,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:56,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718569860] [2021-11-07 07:51:56,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:56,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:56,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:56,807 INFO L87 Difference]: Start difference. First operand 2840 states and 4074 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:57,070 INFO L93 Difference]: Finished difference Result 5648 states and 8103 transitions. [2021-11-07 07:51:57,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:57,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:57,078 INFO L225 Difference]: With dead ends: 5648 [2021-11-07 07:51:57,079 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:57,085 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:57,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4230362803804157) internal successors, (4040), 2839 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4040 transitions. [2021-11-07 07:51:57,312 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4040 transitions. Word has length 149 [2021-11-07 07:51:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:57,313 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4040 transitions. [2021-11-07 07:51:57,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4040 transitions. [2021-11-07 07:51:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:57,316 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:57,316 INFO L513 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] [2021-11-07 07:51:57,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-07 07:51:57,317 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:57,317 INFO L85 PathProgramCache]: Analyzing trace with hash 370659590, now seen corresponding path program 1 times [2021-11-07 07:51:57,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:57,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744573644] [2021-11-07 07:51:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:57,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:57,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:57,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744573644] [2021-11-07 07:51:57,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744573644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:57,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:57,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:57,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541784621] [2021-11-07 07:51:57,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:57,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:57,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:57,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:57,381 INFO L87 Difference]: Start difference. First operand 2840 states and 4040 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:57,686 INFO L93 Difference]: Finished difference Result 5647 states and 8034 transitions. [2021-11-07 07:51:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:57,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:57,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:57,694 INFO L225 Difference]: With dead ends: 5647 [2021-11-07 07:51:57,694 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:57,700 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:57,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:57,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:57,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.411060232476224) internal successors, (4006), 2839 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4006 transitions. [2021-11-07 07:51:57,923 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4006 transitions. Word has length 149 [2021-11-07 07:51:57,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:57,924 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4006 transitions. [2021-11-07 07:51:57,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:57,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4006 transitions. [2021-11-07 07:51:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:57,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:57,927 INFO L513 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] [2021-11-07 07:51:57,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-07 07:51:57,928 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:57,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:57,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1865668469, now seen corresponding path program 1 times [2021-11-07 07:51:57,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:57,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714626655] [2021-11-07 07:51:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:57,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:57,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:57,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714626655] [2021-11-07 07:51:57,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714626655] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:57,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:57,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:51:57,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221067644] [2021-11-07 07:51:57,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:51:57,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:51:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:51:57,996 INFO L87 Difference]: Start difference. First operand 2840 states and 4006 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:58,597 INFO L93 Difference]: Finished difference Result 8176 states and 11542 transitions. [2021-11-07 07:51:58,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:51:58,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:58,613 INFO L225 Difference]: With dead ends: 8176 [2021-11-07 07:51:58,613 INFO L226 Difference]: Without dead ends: 5370 [2021-11-07 07:51:58,620 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:51:58,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5370 states. [2021-11-07 07:51:58,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5370 to 2840. [2021-11-07 07:51:58,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4100035223670306) internal successors, (4003), 2839 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:58,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4003 transitions. [2021-11-07 07:51:58,934 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4003 transitions. Word has length 149 [2021-11-07 07:51:58,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:58,935 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4003 transitions. [2021-11-07 07:51:58,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4003 transitions. [2021-11-07 07:51:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:58,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:58,938 INFO L513 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] [2021-11-07 07:51:58,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-07 07:51:58,939 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:58,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:58,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2096655689, now seen corresponding path program 1 times [2021-11-07 07:51:58,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:58,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10985001] [2021-11-07 07:51:58,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:58,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:58,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:58,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10985001] [2021-11-07 07:51:58,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10985001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:58,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:58,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:58,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613350433] [2021-11-07 07:51:58,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:58,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:58,996 INFO L87 Difference]: Start difference. First operand 2840 states and 4003 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:59,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:51:59,295 INFO L93 Difference]: Finished difference Result 5645 states and 7958 transitions. [2021-11-07 07:51:59,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:51:59,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:51:59,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:51:59,304 INFO L225 Difference]: With dead ends: 5645 [2021-11-07 07:51:59,304 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:51:59,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:59,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:51:59,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:51:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.398027474462839) internal successors, (3969), 2839 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 3969 transitions. [2021-11-07 07:51:59,611 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 3969 transitions. Word has length 149 [2021-11-07 07:51:59,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:51:59,612 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 3969 transitions. [2021-11-07 07:51:59,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:51:59,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 3969 transitions. [2021-11-07 07:51:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:51:59,615 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:51:59,615 INFO L513 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] [2021-11-07 07:51:59,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-07 07:51:59,619 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:51:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:51:59,619 INFO L85 PathProgramCache]: Analyzing trace with hash 179171150, now seen corresponding path program 1 times [2021-11-07 07:51:59,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:51:59,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750205702] [2021-11-07 07:51:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:51:59,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:51:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:51:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:51:59,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:51:59,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750205702] [2021-11-07 07:51:59,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750205702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:51:59,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:51:59,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:51:59,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114623277] [2021-11-07 07:51:59,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:51:59,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:51:59,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:51:59,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:51:59,682 INFO L87 Difference]: Start difference. First operand 2840 states and 3969 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:00,061 INFO L93 Difference]: Finished difference Result 5644 states and 7889 transitions. [2021-11-07 07:52:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:52:00,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:52:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:00,071 INFO L225 Difference]: With dead ends: 5644 [2021-11-07 07:52:00,071 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:52:00,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:52:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:52:00,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:52:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.3860514265586474) internal successors, (3935), 2839 states have internal predecessors, (3935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:00,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 3935 transitions. [2021-11-07 07:52:00,412 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 3935 transitions. Word has length 149 [2021-11-07 07:52:00,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:00,412 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 3935 transitions. [2021-11-07 07:52:00,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:00,413 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 3935 transitions. [2021-11-07 07:52:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:52:00,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:00,416 INFO L513 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] [2021-11-07 07:52:00,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-07 07:52:00,416 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:00,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:00,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2113909876, now seen corresponding path program 1 times [2021-11-07 07:52:00,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:00,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803761357] [2021-11-07 07:52:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:00,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:00,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:00,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803761357] [2021-11-07 07:52:00,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803761357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:00,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:00,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:52:00,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934232899] [2021-11-07 07:52:00,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:52:00,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:00,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:52:00,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:52:00,494 INFO L87 Difference]: Start difference. First operand 2840 states and 3935 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:00,819 INFO L93 Difference]: Finished difference Result 5642 states and 7818 transitions. [2021-11-07 07:52:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:52:00,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:52:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:00,826 INFO L225 Difference]: With dead ends: 5642 [2021-11-07 07:52:00,827 INFO L226 Difference]: Without dead ends: 2840 [2021-11-07 07:52:00,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:52:00,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-11-07 07:52:01,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2021-11-07 07:52:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.3740753786544557) internal successors, (3901), 2839 states have internal predecessors, (3901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 3901 transitions. [2021-11-07 07:52:01,143 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 3901 transitions. Word has length 149 [2021-11-07 07:52:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:01,143 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 3901 transitions. [2021-11-07 07:52:01,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 3901 transitions. [2021-11-07 07:52:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:52:01,146 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:01,146 INFO L513 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] [2021-11-07 07:52:01,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-07 07:52:01,147 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:01,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1631345416, now seen corresponding path program 1 times [2021-11-07 07:52:01,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:01,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286427713] [2021-11-07 07:52:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:01,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:01,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:01,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286427713] [2021-11-07 07:52:01,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286427713] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:01,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:01,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:52:01,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773672995] [2021-11-07 07:52:01,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:52:01,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:52:01,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:52:01,208 INFO L87 Difference]: Start difference. First operand 2840 states and 3901 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:01,833 INFO L93 Difference]: Finished difference Result 8166 states and 11227 transitions. [2021-11-07 07:52:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:52:01,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:52:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:01,847 INFO L225 Difference]: With dead ends: 8166 [2021-11-07 07:52:01,848 INFO L226 Difference]: Without dead ends: 5365 [2021-11-07 07:52:01,856 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:01,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2021-11-07 07:52:02,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 2840. [2021-11-07 07:52:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.3730186685452623) internal successors, (3898), 2839 states have internal predecessors, (3898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 3898 transitions. [2021-11-07 07:52:02,153 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 3898 transitions. Word has length 149 [2021-11-07 07:52:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:02,153 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 3898 transitions. [2021-11-07 07:52:02,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 3898 transitions. [2021-11-07 07:52:02,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 07:52:02,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:02,157 INFO L513 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] [2021-11-07 07:52:02,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-07 07:52:02,157 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash -16017526, now seen corresponding path program 1 times [2021-11-07 07:52:02,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:02,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691038839] [2021-11-07 07:52:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:02,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:52:02,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:02,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691038839] [2021-11-07 07:52:02,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691038839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:02,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:02,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:52:02,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357521945] [2021-11-07 07:52:02,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:52:02,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:52:02,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:52:02,214 INFO L87 Difference]: Start difference. First operand 2840 states and 3898 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:02,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:02,825 INFO L93 Difference]: Finished difference Result 8298 states and 11378 transitions. [2021-11-07 07:52:02,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:52:02,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 07:52:02,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:02,839 INFO L225 Difference]: With dead ends: 8298 [2021-11-07 07:52:02,839 INFO L226 Difference]: Without dead ends: 5499 [2021-11-07 07:52:02,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:52:02,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5499 states. [2021-11-07 07:52:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5499 to 5335. [2021-11-07 07:52:03,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5335 states, 5334 states have (on average 1.3661417322834646) internal successors, (7287), 5334 states have internal predecessors, (7287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:03,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5335 states to 5335 states and 7287 transitions. [2021-11-07 07:52:03,355 INFO L78 Accepts]: Start accepts. Automaton has 5335 states and 7287 transitions. Word has length 149 [2021-11-07 07:52:03,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:03,356 INFO L470 AbstractCegarLoop]: Abstraction has 5335 states and 7287 transitions. [2021-11-07 07:52:03,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:03,356 INFO L276 IsEmpty]: Start isEmpty. Operand 5335 states and 7287 transitions. [2021-11-07 07:52:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:03,365 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:03,365 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:03,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-07 07:52:03,366 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:03,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:03,367 INFO L85 PathProgramCache]: Analyzing trace with hash 249715991, now seen corresponding path program 1 times [2021-11-07 07:52:03,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:03,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81328918] [2021-11-07 07:52:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:03,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:03,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:03,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81328918] [2021-11-07 07:52:03,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81328918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:03,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:03,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:03,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678988467] [2021-11-07 07:52:03,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:03,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:03,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:03,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:03,455 INFO L87 Difference]: Start difference. First operand 5335 states and 7287 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:04,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:04,759 INFO L93 Difference]: Finished difference Result 15776 states and 21549 transitions. [2021-11-07 07:52:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:04,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:04,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:04,788 INFO L225 Difference]: With dead ends: 15776 [2021-11-07 07:52:04,788 INFO L226 Difference]: Without dead ends: 10486 [2021-11-07 07:52:04,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10486 states. [2021-11-07 07:52:05,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10486 to 5416. [2021-11-07 07:52:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5416 states, 5415 states have (on average 1.3558633425669437) internal successors, (7342), 5415 states have internal predecessors, (7342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:05,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5416 states to 5416 states and 7342 transitions. [2021-11-07 07:52:05,544 INFO L78 Accepts]: Start accepts. Automaton has 5416 states and 7342 transitions. Word has length 243 [2021-11-07 07:52:05,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:05,545 INFO L470 AbstractCegarLoop]: Abstraction has 5416 states and 7342 transitions. [2021-11-07 07:52:05,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 5416 states and 7342 transitions. [2021-11-07 07:52:05,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:05,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:05,555 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:05,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-07 07:52:05,556 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:05,557 INFO L85 PathProgramCache]: Analyzing trace with hash 533701529, now seen corresponding path program 1 times [2021-11-07 07:52:05,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:05,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015792758] [2021-11-07 07:52:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:05,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:05,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:05,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015792758] [2021-11-07 07:52:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015792758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:05,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:05,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:05,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100083923] [2021-11-07 07:52:05,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:05,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:05,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:05,649 INFO L87 Difference]: Start difference. First operand 5416 states and 7342 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:07,198 INFO L93 Difference]: Finished difference Result 20621 states and 27937 transitions. [2021-11-07 07:52:07,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:07,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:07,233 INFO L225 Difference]: With dead ends: 20621 [2021-11-07 07:52:07,233 INFO L226 Difference]: Without dead ends: 15257 [2021-11-07 07:52:07,241 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15257 states. [2021-11-07 07:52:07,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15257 to 5575. [2021-11-07 07:52:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5575 states, 5574 states have (on average 1.3457122353785433) internal successors, (7501), 5574 states have internal predecessors, (7501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 7501 transitions. [2021-11-07 07:52:07,818 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 7501 transitions. Word has length 243 [2021-11-07 07:52:07,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:07,819 INFO L470 AbstractCegarLoop]: Abstraction has 5575 states and 7501 transitions. [2021-11-07 07:52:07,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:07,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 7501 transitions. [2021-11-07 07:52:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:07,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:07,829 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:07,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-07 07:52:07,830 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:07,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:07,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1546882149, now seen corresponding path program 1 times [2021-11-07 07:52:07,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:07,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265031116] [2021-11-07 07:52:07,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:07,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:07,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:07,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265031116] [2021-11-07 07:52:07,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265031116] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:07,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:07,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:07,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665558341] [2021-11-07 07:52:07,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:07,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:07,904 INFO L87 Difference]: Start difference. First operand 5575 states and 7501 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:08,981 INFO L93 Difference]: Finished difference Result 13538 states and 18282 transitions. [2021-11-07 07:52:08,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:08,981 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:08,996 INFO L225 Difference]: With dead ends: 13538 [2021-11-07 07:52:08,996 INFO L226 Difference]: Without dead ends: 8025 [2021-11-07 07:52:09,003 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:09,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8025 states. [2021-11-07 07:52:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8025 to 5587. [2021-11-07 07:52:09,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 5586 states have (on average 1.3361976369495165) internal successors, (7464), 5586 states have internal predecessors, (7464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 7464 transitions. [2021-11-07 07:52:09,558 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 7464 transitions. Word has length 243 [2021-11-07 07:52:09,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:09,558 INFO L470 AbstractCegarLoop]: Abstraction has 5587 states and 7464 transitions. [2021-11-07 07:52:09,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:09,559 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 7464 transitions. [2021-11-07 07:52:09,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:09,565 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:09,565 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:09,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-07 07:52:09,566 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:09,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:09,566 INFO L85 PathProgramCache]: Analyzing trace with hash -403721825, now seen corresponding path program 1 times [2021-11-07 07:52:09,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:09,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811465839] [2021-11-07 07:52:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:09,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:09,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:09,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811465839] [2021-11-07 07:52:09,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811465839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:09,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:09,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:09,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885807690] [2021-11-07 07:52:09,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:09,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:09,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:09,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:09,632 INFO L87 Difference]: Start difference. First operand 5587 states and 7464 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:10,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:10,402 INFO L93 Difference]: Finished difference Result 13861 states and 18548 transitions. [2021-11-07 07:52:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:10,407 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:10,419 INFO L225 Difference]: With dead ends: 13861 [2021-11-07 07:52:10,419 INFO L226 Difference]: Without dead ends: 8343 [2021-11-07 07:52:10,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:10,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8343 states. [2021-11-07 07:52:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8343 to 5599. [2021-11-07 07:52:11,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 5598 states have (on average 1.326723829939264) internal successors, (7427), 5598 states have internal predecessors, (7427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:11,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 7427 transitions. [2021-11-07 07:52:11,093 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 7427 transitions. Word has length 243 [2021-11-07 07:52:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:11,093 INFO L470 AbstractCegarLoop]: Abstraction has 5599 states and 7427 transitions. [2021-11-07 07:52:11,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 7427 transitions. [2021-11-07 07:52:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:11,100 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:11,101 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:11,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-07 07:52:11,101 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:11,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:11,102 INFO L85 PathProgramCache]: Analyzing trace with hash -557137245, now seen corresponding path program 1 times [2021-11-07 07:52:11,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:11,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880956596] [2021-11-07 07:52:11,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:11,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:11,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:11,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880956596] [2021-11-07 07:52:11,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880956596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:11,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:11,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:11,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083439034] [2021-11-07 07:52:11,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:11,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:11,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:11,170 INFO L87 Difference]: Start difference. First operand 5599 states and 7427 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:12,213 INFO L93 Difference]: Finished difference Result 14471 states and 19187 transitions. [2021-11-07 07:52:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:12,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:12,255 INFO L225 Difference]: With dead ends: 14471 [2021-11-07 07:52:12,255 INFO L226 Difference]: Without dead ends: 8955 [2021-11-07 07:52:12,279 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:12,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8955 states. [2021-11-07 07:52:12,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8955 to 5611. [2021-11-07 07:52:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5611 states, 5610 states have (on average 1.3172905525846703) internal successors, (7390), 5610 states have internal predecessors, (7390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5611 states to 5611 states and 7390 transitions. [2021-11-07 07:52:12,830 INFO L78 Accepts]: Start accepts. Automaton has 5611 states and 7390 transitions. Word has length 243 [2021-11-07 07:52:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:12,831 INFO L470 AbstractCegarLoop]: Abstraction has 5611 states and 7390 transitions. [2021-11-07 07:52:12,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5611 states and 7390 transitions. [2021-11-07 07:52:12,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:12,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:12,838 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:12,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-07 07:52:12,839 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:12,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1494497703, now seen corresponding path program 1 times [2021-11-07 07:52:12,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:12,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359847758] [2021-11-07 07:52:12,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:12,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:12,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:12,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359847758] [2021-11-07 07:52:12,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359847758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:12,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:12,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:12,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304934167] [2021-11-07 07:52:12,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:12,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:12,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:12,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:12,907 INFO L87 Difference]: Start difference. First operand 5611 states and 7390 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:14,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:14,172 INFO L93 Difference]: Finished difference Result 19275 states and 25535 transitions. [2021-11-07 07:52:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:14,173 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:14,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:14,186 INFO L225 Difference]: With dead ends: 19275 [2021-11-07 07:52:14,187 INFO L226 Difference]: Without dead ends: 13754 [2021-11-07 07:52:14,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13754 states. [2021-11-07 07:52:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13754 to 5770. [2021-11-07 07:52:14,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5770 states, 5769 states have (on average 1.3085456751603397) internal successors, (7549), 5769 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:14,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5770 states to 5770 states and 7549 transitions. [2021-11-07 07:52:14,737 INFO L78 Accepts]: Start accepts. Automaton has 5770 states and 7549 transitions. Word has length 243 [2021-11-07 07:52:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:14,737 INFO L470 AbstractCegarLoop]: Abstraction has 5770 states and 7549 transitions. [2021-11-07 07:52:14,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 5770 states and 7549 transitions. [2021-11-07 07:52:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:14,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:14,743 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:14,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-07 07:52:14,744 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:14,745 INFO L85 PathProgramCache]: Analyzing trace with hash -915127381, now seen corresponding path program 1 times [2021-11-07 07:52:14,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:14,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824797260] [2021-11-07 07:52:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:14,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:14,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:14,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:14,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824797260] [2021-11-07 07:52:14,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824797260] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:14,801 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:14,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:14,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874994014] [2021-11-07 07:52:14,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:14,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:14,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:14,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:14,803 INFO L87 Difference]: Start difference. First operand 5770 states and 7549 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:16,018 INFO L93 Difference]: Finished difference Result 15546 states and 20328 transitions. [2021-11-07 07:52:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:16,030 INFO L225 Difference]: With dead ends: 15546 [2021-11-07 07:52:16,030 INFO L226 Difference]: Without dead ends: 9876 [2021-11-07 07:52:16,040 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9876 states. [2021-11-07 07:52:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9876 to 5782. [2021-11-07 07:52:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5782 states, 5781 states have (on average 1.299429164504411) internal successors, (7512), 5781 states have internal predecessors, (7512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:16,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5782 states to 5782 states and 7512 transitions. [2021-11-07 07:52:16,608 INFO L78 Accepts]: Start accepts. Automaton has 5782 states and 7512 transitions. Word has length 243 [2021-11-07 07:52:16,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:16,608 INFO L470 AbstractCegarLoop]: Abstraction has 5782 states and 7512 transitions. [2021-11-07 07:52:16,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:16,608 INFO L276 IsEmpty]: Start isEmpty. Operand 5782 states and 7512 transitions. [2021-11-07 07:52:16,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:16,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:16,615 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:16,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-07 07:52:16,615 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash -585817937, now seen corresponding path program 1 times [2021-11-07 07:52:16,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:16,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134797410] [2021-11-07 07:52:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:16,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:16,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:16,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134797410] [2021-11-07 07:52:16,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134797410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:16,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:16,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:16,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561574305] [2021-11-07 07:52:16,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:16,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:16,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:16,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:16,686 INFO L87 Difference]: Start difference. First operand 5782 states and 7512 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:18,151 INFO L93 Difference]: Finished difference Result 15869 states and 20594 transitions. [2021-11-07 07:52:18,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:18,152 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:18,165 INFO L225 Difference]: With dead ends: 15869 [2021-11-07 07:52:18,165 INFO L226 Difference]: Without dead ends: 10194 [2021-11-07 07:52:18,171 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10194 states. [2021-11-07 07:52:18,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10194 to 5794. [2021-11-07 07:52:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5794 states, 5793 states have (on average 1.2903504229242189) internal successors, (7475), 5793 states have internal predecessors, (7475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5794 states to 5794 states and 7475 transitions. [2021-11-07 07:52:18,900 INFO L78 Accepts]: Start accepts. Automaton has 5794 states and 7475 transitions. Word has length 243 [2021-11-07 07:52:18,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:18,901 INFO L470 AbstractCegarLoop]: Abstraction has 5794 states and 7475 transitions. [2021-11-07 07:52:18,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5794 states and 7475 transitions. [2021-11-07 07:52:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:18,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:18,907 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:18,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-07 07:52:18,907 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:18,908 INFO L85 PathProgramCache]: Analyzing trace with hash -36630349, now seen corresponding path program 1 times [2021-11-07 07:52:18,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:18,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107920464] [2021-11-07 07:52:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:18,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:18,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:18,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107920464] [2021-11-07 07:52:18,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107920464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:18,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:18,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:52:18,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635879952] [2021-11-07 07:52:18,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:52:18,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:52:18,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:52:18,974 INFO L87 Difference]: Start difference. First operand 5794 states and 7475 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:20,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:20,662 INFO L93 Difference]: Finished difference Result 19427 states and 25016 transitions. [2021-11-07 07:52:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:52:20,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:20,683 INFO L225 Difference]: With dead ends: 19427 [2021-11-07 07:52:20,683 INFO L226 Difference]: Without dead ends: 13742 [2021-11-07 07:52:20,691 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13742 states. [2021-11-07 07:52:21,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13742 to 11009. [2021-11-07 07:52:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11009 states, 11008 states have (on average 1.2840661337209303) internal successors, (14135), 11008 states have internal predecessors, (14135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:21,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11009 states to 11009 states and 14135 transitions. [2021-11-07 07:52:21,814 INFO L78 Accepts]: Start accepts. Automaton has 11009 states and 14135 transitions. Word has length 243 [2021-11-07 07:52:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:21,815 INFO L470 AbstractCegarLoop]: Abstraction has 11009 states and 14135 transitions. [2021-11-07 07:52:21,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:21,815 INFO L276 IsEmpty]: Start isEmpty. Operand 11009 states and 14135 transitions. [2021-11-07 07:52:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:21,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:21,823 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:21,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-07 07:52:21,823 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash 519945588, now seen corresponding path program 1 times [2021-11-07 07:52:21,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:21,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779610187] [2021-11-07 07:52:21,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:21,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:21,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:21,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779610187] [2021-11-07 07:52:21,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779610187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:21,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:21,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:21,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808913471] [2021-11-07 07:52:21,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:21,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:21,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:21,892 INFO L87 Difference]: Start difference. First operand 11009 states and 14135 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:24,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:24,145 INFO L93 Difference]: Finished difference Result 29015 states and 37459 transitions. [2021-11-07 07:52:24,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:24,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:24,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:24,173 INFO L225 Difference]: With dead ends: 29015 [2021-11-07 07:52:24,174 INFO L226 Difference]: Without dead ends: 18119 [2021-11-07 07:52:24,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18119 states. [2021-11-07 07:52:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18119 to 11165. [2021-11-07 07:52:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11165 states, 11164 states have (on average 1.2757076316732354) internal successors, (14242), 11164 states have internal predecessors, (14242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:25,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11165 states to 11165 states and 14242 transitions. [2021-11-07 07:52:25,571 INFO L78 Accepts]: Start accepts. Automaton has 11165 states and 14242 transitions. Word has length 243 [2021-11-07 07:52:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:25,572 INFO L470 AbstractCegarLoop]: Abstraction has 11165 states and 14242 transitions. [2021-11-07 07:52:25,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:25,572 INFO L276 IsEmpty]: Start isEmpty. Operand 11165 states and 14242 transitions. [2021-11-07 07:52:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:25,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:25,578 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:25,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-07 07:52:25,578 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1878042250, now seen corresponding path program 1 times [2021-11-07 07:52:25,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:25,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795826345] [2021-11-07 07:52:25,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:25,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:25,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:25,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795826345] [2021-11-07 07:52:25,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795826345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:25,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:25,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:25,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807556186] [2021-11-07 07:52:25,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:25,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:25,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:25,646 INFO L87 Difference]: Start difference. First operand 11165 states and 14242 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:28,271 INFO L93 Difference]: Finished difference Result 27602 states and 35188 transitions. [2021-11-07 07:52:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:28,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:28,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:28,292 INFO L225 Difference]: With dead ends: 27602 [2021-11-07 07:52:28,293 INFO L226 Difference]: Without dead ends: 16557 [2021-11-07 07:52:28,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:28,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16557 states. [2021-11-07 07:52:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16557 to 11177. [2021-11-07 07:52:29,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11177 states, 11176 states have (on average 1.266732283464567) internal successors, (14157), 11176 states have internal predecessors, (14157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11177 states to 11177 states and 14157 transitions. [2021-11-07 07:52:29,656 INFO L78 Accepts]: Start accepts. Automaton has 11177 states and 14157 transitions. Word has length 243 [2021-11-07 07:52:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:29,656 INFO L470 AbstractCegarLoop]: Abstraction has 11177 states and 14157 transitions. [2021-11-07 07:52:29,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:29,657 INFO L276 IsEmpty]: Start isEmpty. Operand 11177 states and 14157 transitions. [2021-11-07 07:52:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:29,662 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:29,662 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:29,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-07 07:52:29,663 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1330655098, now seen corresponding path program 1 times [2021-11-07 07:52:29,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:29,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062325452] [2021-11-07 07:52:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:29,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:29,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:29,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062325452] [2021-11-07 07:52:29,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062325452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:29,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:29,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:52:29,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280300139] [2021-11-07 07:52:29,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:52:29,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:29,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:52:29,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:52:29,835 INFO L87 Difference]: Start difference. First operand 11177 states and 14157 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:33,381 INFO L93 Difference]: Finished difference Result 37631 states and 47564 transitions. [2021-11-07 07:52:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:52:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:33,416 INFO L225 Difference]: With dead ends: 37631 [2021-11-07 07:52:33,416 INFO L226 Difference]: Without dead ends: 26576 [2021-11-07 07:52:33,425 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26576 states. [2021-11-07 07:52:36,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26576 to 21348. [2021-11-07 07:52:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21348 states, 21347 states have (on average 1.2609734388907106) internal successors, (26918), 21347 states have internal predecessors, (26918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:36,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21348 states to 21348 states and 26918 transitions. [2021-11-07 07:52:36,134 INFO L78 Accepts]: Start accepts. Automaton has 21348 states and 26918 transitions. Word has length 243 [2021-11-07 07:52:36,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:36,135 INFO L470 AbstractCegarLoop]: Abstraction has 21348 states and 26918 transitions. [2021-11-07 07:52:36,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:36,135 INFO L276 IsEmpty]: Start isEmpty. Operand 21348 states and 26918 transitions. [2021-11-07 07:52:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:36,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:36,144 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:36,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-07 07:52:36,144 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:36,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1466878533, now seen corresponding path program 1 times [2021-11-07 07:52:36,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:36,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865002471] [2021-11-07 07:52:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:36,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:36,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:36,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865002471] [2021-11-07 07:52:36,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865002471] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:36,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:36,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 07:52:36,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124913] [2021-11-07 07:52:36,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:52:36,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:52:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:36,214 INFO L87 Difference]: Start difference. First operand 21348 states and 26918 transitions. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:40,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:40,816 INFO L93 Difference]: Finished difference Result 55070 states and 69760 transitions. [2021-11-07 07:52:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:52:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:40,859 INFO L225 Difference]: With dead ends: 55070 [2021-11-07 07:52:40,859 INFO L226 Difference]: Without dead ends: 33848 [2021-11-07 07:52:40,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:52:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33848 states. [2021-11-07 07:52:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33848 to 21648. [2021-11-07 07:52:44,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21648 states, 21647 states have (on average 1.253060470273017) internal successors, (27125), 21647 states have internal predecessors, (27125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21648 states to 21648 states and 27125 transitions. [2021-11-07 07:52:44,057 INFO L78 Accepts]: Start accepts. Automaton has 21648 states and 27125 transitions. Word has length 243 [2021-11-07 07:52:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:44,057 INFO L470 AbstractCegarLoop]: Abstraction has 21648 states and 27125 transitions. [2021-11-07 07:52:44,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:44,057 INFO L276 IsEmpty]: Start isEmpty. Operand 21648 states and 27125 transitions. [2021-11-07 07:52:44,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:44,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:44,066 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:44,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-07 07:52:44,067 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:44,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:44,067 INFO L85 PathProgramCache]: Analyzing trace with hash -962863425, now seen corresponding path program 1 times [2021-11-07 07:52:44,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:44,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504230191] [2021-11-07 07:52:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:44,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:44,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:44,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:44,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504230191] [2021-11-07 07:52:44,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504230191] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:44,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:44,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 07:52:44,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122765977] [2021-11-07 07:52:44,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:52:44,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:44,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:52:44,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:52:44,130 INFO L87 Difference]: Start difference. First operand 21648 states and 27125 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:47,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:47,235 INFO L93 Difference]: Finished difference Result 43275 states and 54218 transitions. [2021-11-07 07:52:47,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:52:47,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:47,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:47,263 INFO L225 Difference]: With dead ends: 43275 [2021-11-07 07:52:47,263 INFO L226 Difference]: Without dead ends: 21648 [2021-11-07 07:52:47,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:52:47,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21648 states. [2021-11-07 07:52:50,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21648 to 21648. [2021-11-07 07:52:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21648 states, 21647 states have (on average 1.2507506813877212) internal successors, (27075), 21647 states have internal predecessors, (27075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21648 states to 21648 states and 27075 transitions. [2021-11-07 07:52:50,906 INFO L78 Accepts]: Start accepts. Automaton has 21648 states and 27075 transitions. Word has length 243 [2021-11-07 07:52:50,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:50,906 INFO L470 AbstractCegarLoop]: Abstraction has 21648 states and 27075 transitions. [2021-11-07 07:52:50,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 21648 states and 27075 transitions. [2021-11-07 07:52:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:50,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:50,915 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:50,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-07 07:52:50,916 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:50,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:50,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1397369023, now seen corresponding path program 1 times [2021-11-07 07:52:50,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:50,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428514311] [2021-11-07 07:52:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:50,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:50,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:50,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428514311] [2021-11-07 07:52:50,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428514311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:50,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:50,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:52:50,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192386420] [2021-11-07 07:52:50,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:52:50,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:50,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:52:50,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:52:50,982 INFO L87 Difference]: Start difference. First operand 21648 states and 27075 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:52:54,208 INFO L93 Difference]: Finished difference Result 43158 states and 53985 transitions. [2021-11-07 07:52:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:52:54,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:52:54,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:52:54,234 INFO L225 Difference]: With dead ends: 43158 [2021-11-07 07:52:54,235 INFO L226 Difference]: Without dead ends: 21648 [2021-11-07 07:52:54,248 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:52:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21648 states. [2021-11-07 07:52:57,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21648 to 21648. [2021-11-07 07:52:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21648 states, 21647 states have (on average 1.249226220723426) internal successors, (27042), 21647 states have internal predecessors, (27042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21648 states to 21648 states and 27042 transitions. [2021-11-07 07:52:57,674 INFO L78 Accepts]: Start accepts. Automaton has 21648 states and 27042 transitions. Word has length 243 [2021-11-07 07:52:57,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:52:57,675 INFO L470 AbstractCegarLoop]: Abstraction has 21648 states and 27042 transitions. [2021-11-07 07:52:57,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:52:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 21648 states and 27042 transitions. [2021-11-07 07:52:57,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-11-07 07:52:57,683 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:52:57,683 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:52:57,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-07 07:52:57,684 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:52:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:52:57,684 INFO L85 PathProgramCache]: Analyzing trace with hash -909321917, now seen corresponding path program 1 times [2021-11-07 07:52:57,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:52:57,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187177618] [2021-11-07 07:52:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:52:57,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:52:57,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:52:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-07 07:52:57,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:52:57,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187177618] [2021-11-07 07:52:57,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187177618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:52:57,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:52:57,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:52:57,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083000732] [2021-11-07 07:52:57,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:52:57,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:52:57,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:52:57,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:52:57,751 INFO L87 Difference]: Start difference. First operand 21648 states and 27042 transitions. Second operand has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 07:53:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:53:03,117 INFO L93 Difference]: Finished difference Result 55307 states and 68753 transitions. [2021-11-07 07:53:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:53:03,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.75) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 243 [2021-11-07 07:53:03,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:53:03,167 INFO L225 Difference]: With dead ends: 55307 [2021-11-07 07:53:03,167 INFO L226 Difference]: Without dead ends: 33711 [2021-11-07 07:53:03,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:53:03,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33711 states.