./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.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_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/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_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/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_045facf8-f1d7-4b2f-a61b-95f1635259a1/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 648a34748ee6f317001c61f0628c2e00b2100c77ff87e7d85b52ec2f91d6d096 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:15:30,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:15:30,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:15:31,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:15:31,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:15:31,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:15:31,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:15:31,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:15:31,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:15:31,034 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:15:31,035 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:15:31,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:15:31,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:15:31,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:15:31,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:15:31,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:15:31,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:15:31,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:15:31,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:15:31,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:15:31,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:15:31,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:15:31,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:15:31,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:15:31,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:15:31,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:15:31,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:15:31,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:15:31,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:15:31,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:15:31,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:15:31,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:15:31,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:15:31,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:15:31,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:15:31,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:15:31,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:15:31,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:15:31,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:15:31,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:15:31,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:15:31,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:15:31,120 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:15:31,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:15:31,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:15:31,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:15:31,122 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:15:31,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:15:31,123 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:15:31,123 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:15:31,123 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:15:31,123 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:15:31,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:15:31,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:15:31,124 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:15:31,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:15:31,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:15:31,125 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:15:31,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:15:31,125 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:15:31,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:15:31,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:15:31,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:15:31,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:15:31,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:15:31,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:15:31,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:15:31,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:15:31,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:15:31,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:15:31,127 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:15:31,128 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:15:31,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:15:31,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:15:31,128 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_045facf8-f1d7-4b2f-a61b-95f1635259a1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 648a34748ee6f317001c61f0628c2e00b2100c77ff87e7d85b52ec2f91d6d096 [2021-11-07 08:15:31,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:15:31,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:15:31,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:15:31,443 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:15:31,444 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:15:31,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c [2021-11-07 08:15:31,548 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/data/109eb6223/a20e6eb3214343d88020497c116bf118/FLAGb34665f97 [2021-11-07 08:15:32,040 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:15:32,041 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c [2021-11-07 08:15:32,053 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/data/109eb6223/a20e6eb3214343d88020497c116bf118/FLAGb34665f97 [2021-11-07 08:15:32,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/data/109eb6223/a20e6eb3214343d88020497c116bf118 [2021-11-07 08:15:32,380 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:15:32,381 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:15:32,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:15:32,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:15:32,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:15:32,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:32,388 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4f5cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32, skipping insertion in model container [2021-11-07 08:15:32,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:32,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:15:32,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:15:32,751 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_045facf8-f1d7-4b2f-a61b-95f1635259a1/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c[16824,16837] [2021-11-07 08:15:32,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:15:32,764 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:15:32,824 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_045facf8-f1d7-4b2f-a61b-95f1635259a1/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c[16824,16837] [2021-11-07 08:15:32,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:15:32,858 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:15:32,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32 WrapperNode [2021-11-07 08:15:32,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:15:32,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:15:32,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:15:32,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:15:32,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:32,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:32,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:15:32,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:15:32,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:15:32,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:15:32,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:32,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:32,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:32,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:32,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:33,002 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:33,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:33,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:15:33,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:15:33,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:15:33,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:15:33,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (1/1) ... [2021-11-07 08:15:33,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:15:33,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:33,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:15:33,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:15:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:15:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:15:33,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:15:33,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:15:33,802 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:15:33,803 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-11-07 08:15:33,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:15:33 BoogieIcfgContainer [2021-11-07 08:15:33,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:15:33,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:15:33,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:15:33,811 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:15:33,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:15:32" (1/3) ... [2021-11-07 08:15:33,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b5165df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:15:33, skipping insertion in model container [2021-11-07 08:15:33,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:15:32" (2/3) ... [2021-11-07 08:15:33,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b5165df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:15:33, skipping insertion in model container [2021-11-07 08:15:33,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:15:33" (3/3) ... [2021-11-07 08:15:33,814 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c [2021-11-07 08:15:33,819 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:15:33,819 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:15:33,871 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:15:33,882 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 08:15:33,882 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:15:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 140 states have (on average 1.7214285714285715) internal successors, (241), 141 states have internal predecessors, (241), 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 08:15:33,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:15:33,910 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:33,911 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] [2021-11-07 08:15:33,913 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:33,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1765981308, now seen corresponding path program 1 times [2021-11-07 08:15:33,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:33,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197910819] [2021-11-07 08:15:33,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:33,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:34,209 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 08:15:34,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:34,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197910819] [2021-11-07 08:15:34,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197910819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:34,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:34,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:15:34,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340037122] [2021-11-07 08:15:34,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:15:34,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:34,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:15:34,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:34,248 INFO L87 Difference]: Start difference. First operand has 142 states, 140 states have (on average 1.7214285714285715) internal successors, (241), 141 states have internal predecessors, (241), 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 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 08:15:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:34,423 INFO L93 Difference]: Finished difference Result 241 states and 398 transitions. [2021-11-07 08:15:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 08:15:34,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2021-11-07 08:15:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:34,441 INFO L225 Difference]: With dead ends: 241 [2021-11-07 08:15:34,442 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 08:15:34,446 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 08:15:34,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 08:15:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-11-07 08:15:34,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.4087591240875912) internal successors, (193), 137 states have internal predecessors, (193), 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 08:15:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 193 transitions. [2021-11-07 08:15:34,485 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 193 transitions. Word has length 37 [2021-11-07 08:15:34,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:34,486 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 193 transitions. [2021-11-07 08:15:34,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 08:15:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 193 transitions. [2021-11-07 08:15:34,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:15:34,490 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:34,491 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] [2021-11-07 08:15:34,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:15:34,491 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:34,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:34,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1408949682, now seen corresponding path program 1 times [2021-11-07 08:15:34,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:34,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226898725] [2021-11-07 08:15:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:34,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:34,697 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 08:15:34,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:34,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226898725] [2021-11-07 08:15:34,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226898725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:34,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:34,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:34,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012392443] [2021-11-07 08:15:34,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:34,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:34,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:34,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:34,702 INFO L87 Difference]: Start difference. First operand 138 states and 193 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 08:15:34,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:34,734 INFO L93 Difference]: Finished difference Result 308 states and 465 transitions. [2021-11-07 08:15:34,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:34,734 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 77 [2021-11-07 08:15:34,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:34,738 INFO L225 Difference]: With dead ends: 308 [2021-11-07 08:15:34,738 INFO L226 Difference]: Without dead ends: 217 [2021-11-07 08:15:34,739 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 08:15:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-07 08:15:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2021-11-07 08:15:34,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.4813084112149533) internal successors, (317), 214 states have internal predecessors, (317), 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 08:15:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 317 transitions. [2021-11-07 08:15:34,767 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 317 transitions. Word has length 77 [2021-11-07 08:15:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:34,768 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 317 transitions. [2021-11-07 08:15:34,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 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 08:15:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 317 transitions. [2021-11-07 08:15:34,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 08:15:34,771 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:34,771 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] [2021-11-07 08:15:34,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 08:15:34,772 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:34,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1762847602, now seen corresponding path program 1 times [2021-11-07 08:15:34,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:34,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927401213] [2021-11-07 08:15:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:34,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:34,981 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 08:15:34,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:34,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927401213] [2021-11-07 08:15:34,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927401213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:34,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:34,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:34,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155274739] [2021-11-07 08:15:34,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:34,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:34,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:34,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:34,984 INFO L87 Difference]: Start difference. First operand 215 states and 317 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 08:15:35,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:35,016 INFO L93 Difference]: Finished difference Result 527 states and 817 transitions. [2021-11-07 08:15:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:35,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-11-07 08:15:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:35,021 INFO L225 Difference]: With dead ends: 527 [2021-11-07 08:15:35,021 INFO L226 Difference]: Without dead ends: 359 [2021-11-07 08:15:35,023 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 08:15:35,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-07 08:15:35,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2021-11-07 08:15:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.5280898876404494) internal successors, (544), 356 states have internal predecessors, (544), 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 08:15:35,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 544 transitions. [2021-11-07 08:15:35,054 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 544 transitions. Word has length 78 [2021-11-07 08:15:35,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:35,055 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 544 transitions. [2021-11-07 08:15:35,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 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 08:15:35,055 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 544 transitions. [2021-11-07 08:15:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:15:35,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:35,059 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] [2021-11-07 08:15:35,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 08:15:35,059 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:35,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash -863425826, now seen corresponding path program 1 times [2021-11-07 08:15:35,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:35,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492215408] [2021-11-07 08:15:35,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:35,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:35,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:35,204 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 08:15:35,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:35,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492215408] [2021-11-07 08:15:35,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492215408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:35,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:35,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:35,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469005079] [2021-11-07 08:15:35,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:35,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:35,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:35,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:35,207 INFO L87 Difference]: Start difference. First operand 357 states and 544 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 08:15:35,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:35,271 INFO L93 Difference]: Finished difference Result 929 states and 1458 transitions. [2021-11-07 08:15:35,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:35,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-07 08:15:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:35,280 INFO L225 Difference]: With dead ends: 929 [2021-11-07 08:15:35,280 INFO L226 Difference]: Without dead ends: 619 [2021-11-07 08:15:35,286 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 08:15:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-11-07 08:15:35,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2021-11-07 08:15:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.551948051948052) internal successors, (956), 616 states have internal predecessors, (956), 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 08:15:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 956 transitions. [2021-11-07 08:15:35,342 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 956 transitions. Word has length 79 [2021-11-07 08:15:35,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:35,343 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 956 transitions. [2021-11-07 08:15:35,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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 08:15:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 956 transitions. [2021-11-07 08:15:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 08:15:35,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:35,347 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] [2021-11-07 08:15:35,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 08:15:35,348 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:35,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:35,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2005690142, now seen corresponding path program 1 times [2021-11-07 08:15:35,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:35,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264813312] [2021-11-07 08:15:35,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:35,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:35,450 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 08:15:35,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:35,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264813312] [2021-11-07 08:15:35,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264813312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:35,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:35,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:35,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371544629] [2021-11-07 08:15:35,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:35,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:35,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:35,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:35,454 INFO L87 Difference]: Start difference. First operand 617 states and 956 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 08:15:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:35,526 INFO L93 Difference]: Finished difference Result 1661 states and 2614 transitions. [2021-11-07 08:15:35,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:35,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 80 [2021-11-07 08:15:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:35,541 INFO L225 Difference]: With dead ends: 1661 [2021-11-07 08:15:35,542 INFO L226 Difference]: Without dead ends: 1091 [2021-11-07 08:15:35,543 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 08:15:35,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-11-07 08:15:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1089. [2021-11-07 08:15:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1088 states have (on average 1.5588235294117647) internal successors, (1696), 1088 states have internal predecessors, (1696), 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 08:15:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1696 transitions. [2021-11-07 08:15:35,595 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1696 transitions. Word has length 80 [2021-11-07 08:15:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:35,595 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1696 transitions. [2021-11-07 08:15:35,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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 08:15:35,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1696 transitions. [2021-11-07 08:15:35,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-07 08:15:35,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:35,602 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] [2021-11-07 08:15:35,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-07 08:15:35,602 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:35,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:35,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1850213230, now seen corresponding path program 1 times [2021-11-07 08:15:35,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:35,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807001064] [2021-11-07 08:15:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:35,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:35,711 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 08:15:35,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:35,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807001064] [2021-11-07 08:15:35,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807001064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:35,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:35,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:35,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189883882] [2021-11-07 08:15:35,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:35,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:35,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:35,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:35,721 INFO L87 Difference]: Start difference. First operand 1089 states and 1696 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 08:15:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:35,807 INFO L93 Difference]: Finished difference Result 2981 states and 4674 transitions. [2021-11-07 08:15:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 81 [2021-11-07 08:15:35,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:35,827 INFO L225 Difference]: With dead ends: 2981 [2021-11-07 08:15:35,827 INFO L226 Difference]: Without dead ends: 1939 [2021-11-07 08:15:35,829 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 08:15:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1939 states. [2021-11-07 08:15:35,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1939 to 1937. [2021-11-07 08:15:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 1.5537190082644627) internal successors, (3008), 1936 states have internal predecessors, (3008), 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 08:15:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 3008 transitions. [2021-11-07 08:15:35,900 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 3008 transitions. Word has length 81 [2021-11-07 08:15:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:35,902 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 3008 transitions. [2021-11-07 08:15:35,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 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 08:15:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 3008 transitions. [2021-11-07 08:15:35,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:15:35,909 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:35,910 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] [2021-11-07 08:15:35,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-07 08:15:35,910 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1094060462, now seen corresponding path program 1 times [2021-11-07 08:15:35,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:35,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780937799] [2021-11-07 08:15:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:35,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:35,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:36,152 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 08:15:36,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:36,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780937799] [2021-11-07 08:15:36,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780937799] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:36,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:36,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:15:36,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441728855] [2021-11-07 08:15:36,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:15:36,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:36,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:15:36,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:15:36,156 INFO L87 Difference]: Start difference. First operand 1937 states and 3008 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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 08:15:36,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:36,734 INFO L93 Difference]: Finished difference Result 12077 states and 18694 transitions. [2021-11-07 08:15:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:15:36,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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 82 [2021-11-07 08:15:36,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:36,794 INFO L225 Difference]: With dead ends: 12077 [2021-11-07 08:15:36,795 INFO L226 Difference]: Without dead ends: 10187 [2021-11-07 08:15:36,801 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:15:36,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10187 states. [2021-11-07 08:15:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10187 to 10177. [2021-11-07 08:15:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10177 states, 10176 states have (on average 1.5424528301886793) internal successors, (15696), 10176 states have internal predecessors, (15696), 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 08:15:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10177 states to 10177 states and 15696 transitions. [2021-11-07 08:15:37,406 INFO L78 Accepts]: Start accepts. Automaton has 10177 states and 15696 transitions. Word has length 82 [2021-11-07 08:15:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:37,407 INFO L470 AbstractCegarLoop]: Abstraction has 10177 states and 15696 transitions. [2021-11-07 08:15:37,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 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 08:15:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 10177 states and 15696 transitions. [2021-11-07 08:15:37,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 08:15:37,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:37,409 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] [2021-11-07 08:15:37,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-07 08:15:37,409 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:37,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1417912184, now seen corresponding path program 1 times [2021-11-07 08:15:37,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:37,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140582445] [2021-11-07 08:15:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:37,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:37,473 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 08:15:37,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:37,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140582445] [2021-11-07 08:15:37,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140582445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:37,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:37,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:37,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310980133] [2021-11-07 08:15:37,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:37,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:37,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:37,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:37,478 INFO L87 Difference]: Start difference. First operand 10177 states and 15696 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 08:15:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:38,223 INFO L93 Difference]: Finished difference Result 28709 states and 44114 transitions. [2021-11-07 08:15:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:38,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 82 [2021-11-07 08:15:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:38,333 INFO L225 Difference]: With dead ends: 28709 [2021-11-07 08:15:38,333 INFO L226 Difference]: Without dead ends: 18579 [2021-11-07 08:15:38,352 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 08:15:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18579 states. [2021-11-07 08:15:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18579 to 18577. [2021-11-07 08:15:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18577 states, 18576 states have (on average 1.5219638242894056) internal successors, (28272), 18576 states have internal predecessors, (28272), 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 08:15:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18577 states to 18577 states and 28272 transitions. [2021-11-07 08:15:39,387 INFO L78 Accepts]: Start accepts. Automaton has 18577 states and 28272 transitions. Word has length 82 [2021-11-07 08:15:39,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:39,388 INFO L470 AbstractCegarLoop]: Abstraction has 18577 states and 28272 transitions. [2021-11-07 08:15:39,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 08:15:39,389 INFO L276 IsEmpty]: Start isEmpty. Operand 18577 states and 28272 transitions. [2021-11-07 08:15:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 08:15:39,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:39,390 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] [2021-11-07 08:15:39,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-07 08:15:39,391 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:39,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:39,392 INFO L85 PathProgramCache]: Analyzing trace with hash -867446125, now seen corresponding path program 1 times [2021-11-07 08:15:39,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:39,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748200368] [2021-11-07 08:15:39,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:39,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:15:39,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:39,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748200368] [2021-11-07 08:15:39,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748200368] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:39,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:39,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:15:39,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746635922] [2021-11-07 08:15:39,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:15:39,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:39,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:15:39,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:15:39,604 INFO L87 Difference]: Start difference. First operand 18577 states and 28272 transitions. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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 08:15:42,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:42,742 INFO L93 Difference]: Finished difference Result 103967 states and 158647 transitions. [2021-11-07 08:15:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:15:42,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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 83 [2021-11-07 08:15:42,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:43,025 INFO L225 Difference]: With dead ends: 103967 [2021-11-07 08:15:43,026 INFO L226 Difference]: Without dead ends: 85437 [2021-11-07 08:15:43,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:15:43,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85437 states. [2021-11-07 08:15:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85437 to 37105. [2021-11-07 08:15:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37105 states, 37104 states have (on average 1.5019404915912031) internal successors, (55728), 37104 states have internal predecessors, (55728), 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 08:15:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37105 states to 37105 states and 55728 transitions. [2021-11-07 08:15:46,013 INFO L78 Accepts]: Start accepts. Automaton has 37105 states and 55728 transitions. Word has length 83 [2021-11-07 08:15:46,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:46,013 INFO L470 AbstractCegarLoop]: Abstraction has 37105 states and 55728 transitions. [2021-11-07 08:15:46,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 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 08:15:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 37105 states and 55728 transitions. [2021-11-07 08:15:46,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 08:15:46,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:46,016 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] [2021-11-07 08:15:46,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-07 08:15:46,017 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:46,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:46,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1504349213, now seen corresponding path program 1 times [2021-11-07 08:15:46,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:46,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083573231] [2021-11-07 08:15:46,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:46,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:46,133 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 08:15:46,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:46,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083573231] [2021-11-07 08:15:46,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083573231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:46,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:46,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-07 08:15:46,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362893614] [2021-11-07 08:15:46,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:15:46,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:46,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:15:46,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:15:46,136 INFO L87 Difference]: Start difference. First operand 37105 states and 55728 transitions. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 08:15:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:49,052 INFO L93 Difference]: Finished difference Result 77235 states and 114481 transitions. [2021-11-07 08:15:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 08:15:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 84 [2021-11-07 08:15:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:49,345 INFO L225 Difference]: With dead ends: 77235 [2021-11-07 08:15:49,345 INFO L226 Difference]: Without dead ends: 77233 [2021-11-07 08:15:49,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:15:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77233 states. [2021-11-07 08:15:51,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77233 to 39409. [2021-11-07 08:15:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39409 states, 39408 states have (on average 1.4725943970767357) internal successors, (58032), 39408 states have internal predecessors, (58032), 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 08:15:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39409 states to 39409 states and 58032 transitions. [2021-11-07 08:15:51,628 INFO L78 Accepts]: Start accepts. Automaton has 39409 states and 58032 transitions. Word has length 84 [2021-11-07 08:15:51,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:51,629 INFO L470 AbstractCegarLoop]: Abstraction has 39409 states and 58032 transitions. [2021-11-07 08:15:51,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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 08:15:51,629 INFO L276 IsEmpty]: Start isEmpty. Operand 39409 states and 58032 transitions. [2021-11-07 08:15:51,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 08:15:51,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:51,631 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] [2021-11-07 08:15:51,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-07 08:15:51,632 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:51,633 INFO L85 PathProgramCache]: Analyzing trace with hash 662393451, now seen corresponding path program 1 times [2021-11-07 08:15:51,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:51,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932757823] [2021-11-07 08:15:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:51,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:51,723 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 08:15:51,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:51,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932757823] [2021-11-07 08:15:51,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932757823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:15:51,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:15:51,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:15:51,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783212648] [2021-11-07 08:15:51,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:15:51,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:51,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:15:51,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:15:51,728 INFO L87 Difference]: Start difference. First operand 39409 states and 58032 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 08:15:53,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:15:53,950 INFO L93 Difference]: Finished difference Result 95831 states and 141140 transitions. [2021-11-07 08:15:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:15:53,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 85 [2021-11-07 08:15:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:15:54,075 INFO L225 Difference]: With dead ends: 95831 [2021-11-07 08:15:54,075 INFO L226 Difference]: Without dead ends: 56469 [2021-11-07 08:15:54,126 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 08:15:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56469 states. [2021-11-07 08:15:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56469 to 56467. [2021-11-07 08:15:56,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56467 states, 56466 states have (on average 1.4664045620373323) internal successors, (82802), 56466 states have internal predecessors, (82802), 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 08:15:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56467 states to 56467 states and 82802 transitions. [2021-11-07 08:15:56,961 INFO L78 Accepts]: Start accepts. Automaton has 56467 states and 82802 transitions. Word has length 85 [2021-11-07 08:15:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:15:56,962 INFO L470 AbstractCegarLoop]: Abstraction has 56467 states and 82802 transitions. [2021-11-07 08:15:56,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 08:15:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 56467 states and 82802 transitions. [2021-11-07 08:15:57,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 08:15:57,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:15:57,001 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:15:57,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-07 08:15:57,002 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:15:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:15:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1460670259, now seen corresponding path program 1 times [2021-11-07 08:15:57,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:15:57,003 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760022433] [2021-11-07 08:15:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:57,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:15:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:15:57,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:15:57,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760022433] [2021-11-07 08:15:57,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760022433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:57,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59228613] [2021-11-07 08:15:57,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:15:57,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:15:57,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:15:57,199 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:15:57,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:15:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:15:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:15:57,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:15:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 08:15:58,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59228613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:15:58,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:15:58,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2021-11-07 08:15:58,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809961522] [2021-11-07 08:15:58,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:15:58,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:15:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:15:58,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:15:58,042 INFO L87 Difference]: Start difference. First operand 56467 states and 82802 transitions. Second operand has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 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 08:16:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:02,271 INFO L93 Difference]: Finished difference Result 140107 states and 206263 transitions. [2021-11-07 08:16:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:16:02,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 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 116 [2021-11-07 08:16:02,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:02,450 INFO L225 Difference]: With dead ends: 140107 [2021-11-07 08:16:02,450 INFO L226 Difference]: Without dead ends: 100745 [2021-11-07 08:16:02,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-07 08:16:02,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100745 states. [2021-11-07 08:16:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100745 to 93779. [2021-11-07 08:16:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93779 states, 93778 states have (on average 1.4616861097485552) internal successors, (137074), 93778 states have internal predecessors, (137074), 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 08:16:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93779 states to 93779 states and 137074 transitions. [2021-11-07 08:16:06,803 INFO L78 Accepts]: Start accepts. Automaton has 93779 states and 137074 transitions. Word has length 116 [2021-11-07 08:16:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:06,804 INFO L470 AbstractCegarLoop]: Abstraction has 93779 states and 137074 transitions. [2021-11-07 08:16:06,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.875) internal successors, (223), 8 states have internal predecessors, (223), 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 08:16:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 93779 states and 137074 transitions. [2021-11-07 08:16:06,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 08:16:06,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:06,837 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:06,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 08:16:07,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_045facf8-f1d7-4b2f-a61b-95f1635259a1/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:16:07,052 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:07,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash 761837313, now seen corresponding path program 1 times [2021-11-07 08:16:07,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:07,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843100964] [2021-11-07 08:16:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:07,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 08:16:07,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:07,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843100964] [2021-11-07 08:16:07,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843100964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:07,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:07,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-07 08:16:07,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837945936] [2021-11-07 08:16:07,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:16:07,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:07,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:16:07,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:16:07,213 INFO L87 Difference]: Start difference. First operand 93779 states and 137074 transitions. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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 08:16:14,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:16:14,571 INFO L93 Difference]: Finished difference Result 243713 states and 359257 transitions. [2021-11-07 08:16:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:16:14,572 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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 117 [2021-11-07 08:16:14,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:16:14,841 INFO L225 Difference]: With dead ends: 243713 [2021-11-07 08:16:14,841 INFO L226 Difference]: Without dead ends: 210239 [2021-11-07 08:16:14,884 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:16:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210239 states. [2021-11-07 08:16:20,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210239 to 126099. [2021-11-07 08:16:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126099 states, 126098 states have (on average 1.4631318498310837) internal successors, (184498), 126098 states have internal predecessors, (184498), 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 08:16:20,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126099 states to 126099 states and 184498 transitions. [2021-11-07 08:16:20,858 INFO L78 Accepts]: Start accepts. Automaton has 126099 states and 184498 transitions. Word has length 117 [2021-11-07 08:16:20,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:16:20,858 INFO L470 AbstractCegarLoop]: Abstraction has 126099 states and 184498 transitions. [2021-11-07 08:16:20,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 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 08:16:20,859 INFO L276 IsEmpty]: Start isEmpty. Operand 126099 states and 184498 transitions. [2021-11-07 08:16:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 08:16:20,880 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:16:20,880 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:16:20,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-07 08:16:20,881 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:16:20,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:16:20,881 INFO L85 PathProgramCache]: Analyzing trace with hash 739766161, now seen corresponding path program 1 times [2021-11-07 08:16:20,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:16:20,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572242613] [2021-11-07 08:16:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:16:20,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:16:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:16:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:16:20,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:16:20,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572242613] [2021-11-07 08:16:20,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572242613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:16:20,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:16:20,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:16:20,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609258371] [2021-11-07 08:16:20,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:16:20,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:16:20,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:16:20,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:16:20,945 INFO L87 Difference]: Start difference. First operand 126099 states and 184498 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 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)