./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y --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 5e99154d55f7fd098c0e840b496605adea5c7214bf70234e7c54dceeadfa306b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:34:51,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:34:51,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:34:51,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:34:51,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:34:51,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:34:51,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:34:51,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:34:51,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:34:51,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:34:51,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:34:51,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:34:51,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:34:51,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:34:51,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:34:51,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:34:51,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:34:51,922 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:34:51,924 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:34:51,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:34:51,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:34:51,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:34:51,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:34:51,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:34:51,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:34:51,940 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:34:51,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:34:51,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:34:51,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:34:51,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:34:51,956 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:34:51,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:34:51,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:34:51,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:34:51,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:34:51,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:34:51,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:34:51,965 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:34:51,966 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:34:51,967 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:34:51,969 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:34:51,971 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:34:52,010 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:34:52,010 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:34:52,011 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:34:52,011 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:34:52,012 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:34:52,012 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:34:52,013 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:34:52,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:34:52,014 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:34:52,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:34:52,015 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:34:52,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:34:52,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:34:52,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:34:52,016 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:34:52,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:34:52,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:34:52,017 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:34:52,017 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:34:52,017 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:34:52,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:34:52,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:34:52,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:34:52,019 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:34:52,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:34:52,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:34:52,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:34:52,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:34:52,020 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:34:52,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:34:52,021 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:34:52,021 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:34:52,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:34:52,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:34:52,022 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_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5e99154d55f7fd098c0e840b496605adea5c7214bf70234e7c54dceeadfa306b [2021-11-13 18:34:52,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:34:52,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:34:52,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:34:52,389 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:34:52,390 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:34:52,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c [2021-11-13 18:34:52,481 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/data/a703285c8/245bc7a2ed214ab8bec9882ae96fc64d/FLAGb66387f90 [2021-11-13 18:34:53,130 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:34:53,131 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c [2021-11-13 18:34:53,147 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/data/a703285c8/245bc7a2ed214ab8bec9882ae96fc64d/FLAGb66387f90 [2021-11-13 18:34:53,434 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/data/a703285c8/245bc7a2ed214ab8bec9882ae96fc64d [2021-11-13 18:34:53,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:34:53,438 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:34:53,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:34:53,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:34:53,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:34:53,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:53,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66ae6448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53, skipping insertion in model container [2021-11-13 18:34:53,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:53,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:34:53,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:34:53,841 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_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c[12751,12764] [2021-11-13 18:34:53,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:34:53,857 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:34:53,947 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_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c[12751,12764] [2021-11-13 18:34:53,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:34:53,979 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:34:53,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53 WrapperNode [2021-11-13 18:34:53,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:34:53,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:34:53,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:34:53,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:34:53,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:54,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:54,084 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:34:54,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:34:54,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:34:54,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:34:54,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:54,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:54,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:54,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:54,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:54,164 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:54,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:54,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:34:54,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:34:54,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:34:54,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:34:54,197 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (1/1) ... [2021-11-13 18:34:54,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:34:54,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:34:54,245 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:34:54,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:34:54,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:34:54,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:34:54,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:34:54,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:34:55,179 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:34:55,179 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:34:55,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:34:55 BoogieIcfgContainer [2021-11-13 18:34:55,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:34:55,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:34:55,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:34:55,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:34:55,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:34:53" (1/3) ... [2021-11-13 18:34:55,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c3b389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:34:55, skipping insertion in model container [2021-11-13 18:34:55,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:34:53" (2/3) ... [2021-11-13 18:34:55,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c3b389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:34:55, skipping insertion in model container [2021-11-13 18:34:55,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:34:55" (3/3) ... [2021-11-13 18:34:55,194 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c [2021-11-13 18:34:55,200 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:34:55,201 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:34:55,268 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:34:55,278 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 [2021-11-13 18:34:55,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:34:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 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) [2021-11-13 18:34:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 18:34:55,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:55,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:55,330 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:55,338 INFO L85 PathProgramCache]: Analyzing trace with hash 563549969, now seen corresponding path program 1 times [2021-11-13 18:34:55,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:55,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356238779] [2021-11-13 18:34:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:55,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:34:55,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:55,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356238779] [2021-11-13 18:34:55,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356238779] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:55,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:55,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:34:55,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324766488] [2021-11-13 18:34:55,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:55,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:34:55,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:55,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:34:55,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:34:55,706 INFO L87 Difference]: Start difference. First operand has 122 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 121 states have internal predecessors, (205), 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 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2021-11-13 18:34:55,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:55,766 INFO L93 Difference]: Finished difference Result 207 states and 340 transitions. [2021-11-13 18:34:55,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:34:55,770 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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 33 [2021-11-13 18:34:55,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:55,782 INFO L225 Difference]: With dead ends: 207 [2021-11-13 18:34:55,783 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:34:55,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:34:55,791 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.51ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:55,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 7.51ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:34:55,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:34:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-13 18:34:55,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.6923076923076923) internal successors, (198), 117 states have internal predecessors, (198), 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) [2021-11-13 18:34:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 198 transitions. [2021-11-13 18:34:55,839 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 198 transitions. Word has length 33 [2021-11-13 18:34:55,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:55,839 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 198 transitions. [2021-11-13 18:34:55,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 16.5) internal successors, (33), 2 states have internal predecessors, (33), 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) [2021-11-13 18:34:55,840 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 198 transitions. [2021-11-13 18:34:55,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-13 18:34:55,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:55,843 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:55,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:34:55,844 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:55,845 INFO L85 PathProgramCache]: Analyzing trace with hash 54076879, now seen corresponding path program 1 times [2021-11-13 18:34:55,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:55,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504230295] [2021-11-13 18:34:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:55,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:34:55,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:55,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504230295] [2021-11-13 18:34:55,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504230295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:55,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:55,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:34:55,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89948569] [2021-11-13 18:34:55,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:55,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:34:55,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:55,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:34:55,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:34:55,991 INFO L87 Difference]: Start difference. First operand 118 states and 198 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-11-13 18:34:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:56,116 INFO L93 Difference]: Finished difference Result 202 states and 330 transitions. [2021-11-13 18:34:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:34:56,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 33 [2021-11-13 18:34:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:56,121 INFO L225 Difference]: With dead ends: 202 [2021-11-13 18:34:56,124 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:34:56,125 INFO L932 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 [2021-11-13 18:34:56,128 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 3 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.19ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:56,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 749 Invalid, 42 Unknown, 0 Unchecked, 8.19ms Time], IncrementalHoareTripleChecker [31 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 57.59ms Time] [2021-11-13 18:34:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:34:56,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-13 18:34:56,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.4188034188034189) internal successors, (166), 117 states have internal predecessors, (166), 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) [2021-11-13 18:34:56,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2021-11-13 18:34:56,164 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 33 [2021-11-13 18:34:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:56,166 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2021-11-13 18:34:56,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-11-13 18:34:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2021-11-13 18:34:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:34:56,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:56,175 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:56,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:34:56,175 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:56,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1850253404, now seen corresponding path program 1 times [2021-11-13 18:34:56,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:56,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903108464] [2021-11-13 18:34:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:56,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:34:56,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:56,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903108464] [2021-11-13 18:34:56,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903108464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:56,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:56,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:34:56,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768164944] [2021-11-13 18:34:56,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:56,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:34:56,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:34:56,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:34:56,406 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-13 18:34:56,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:56,456 INFO L93 Difference]: Finished difference Result 266 states and 402 transitions. [2021-11-13 18:34:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:34:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-13 18:34:56,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:56,461 INFO L225 Difference]: With dead ends: 266 [2021-11-13 18:34:56,461 INFO L226 Difference]: Without dead ends: 186 [2021-11-13 18:34:56,462 INFO L932 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 [2021-11-13 18:34:56,464 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 116 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.35ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:56,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 389 Invalid, 7 Unknown, 0 Unchecked, 3.35ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 29.22ms Time] [2021-11-13 18:34:56,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-13 18:34:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-11-13 18:34:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.4863387978142077) internal successors, (272), 183 states have internal predecessors, (272), 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) [2021-11-13 18:34:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 272 transitions. [2021-11-13 18:34:56,514 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 272 transitions. Word has length 64 [2021-11-13 18:34:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:56,523 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 272 transitions. [2021-11-13 18:34:56,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2021-11-13 18:34:56,524 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 272 transitions. [2021-11-13 18:34:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:34:56,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:56,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:56,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:34:56,536 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:56,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1736606100, now seen corresponding path program 1 times [2021-11-13 18:34:56,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:56,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252290015] [2021-11-13 18:34:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:56,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:34:56,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:56,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252290015] [2021-11-13 18:34:56,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252290015] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:56,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:56,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:34:56,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61762310] [2021-11-13 18:34:56,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:56,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:34:56,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:56,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:34:56,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:34:56,707 INFO L87 Difference]: Start difference. First operand 184 states and 272 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-11-13 18:34:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:56,747 INFO L93 Difference]: Finished difference Result 452 states and 700 transitions. [2021-11-13 18:34:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:34:56,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-13 18:34:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:56,752 INFO L225 Difference]: With dead ends: 452 [2021-11-13 18:34:56,752 INFO L226 Difference]: Without dead ends: 306 [2021-11-13 18:34:56,754 INFO L932 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 [2021-11-13 18:34:56,756 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 111 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.43ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:56,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 380 Invalid, 7 Unknown, 0 Unchecked, 3.43ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 16.22ms Time] [2021-11-13 18:34:56,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-13 18:34:56,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2021-11-13 18:34:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.528052805280528) internal successors, (463), 303 states have internal predecessors, (463), 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) [2021-11-13 18:34:56,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 463 transitions. [2021-11-13 18:34:56,820 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 463 transitions. Word has length 65 [2021-11-13 18:34:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:56,821 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 463 transitions. [2021-11-13 18:34:56,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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) [2021-11-13 18:34:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 463 transitions. [2021-11-13 18:34:56,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:34:56,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:56,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:56,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:34:56,824 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:56,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:56,825 INFO L85 PathProgramCache]: Analyzing trace with hash 245456436, now seen corresponding path program 1 times [2021-11-13 18:34:56,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:56,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993421513] [2021-11-13 18:34:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:56,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:56,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:34:56,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:56,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993421513] [2021-11-13 18:34:56,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993421513] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:56,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:57,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:34:57,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494771331] [2021-11-13 18:34:57,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:57,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:34:57,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:57,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:34:57,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:34:57,006 INFO L87 Difference]: Start difference. First operand 304 states and 463 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-13 18:34:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:57,074 INFO L93 Difference]: Finished difference Result 788 states and 1233 transitions. [2021-11-13 18:34:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:34:57,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-11-13 18:34:57,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:57,083 INFO L225 Difference]: With dead ends: 788 [2021-11-13 18:34:57,084 INFO L226 Difference]: Without dead ends: 522 [2021-11-13 18:34:57,090 INFO L932 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 [2021-11-13 18:34:57,099 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 106 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.55ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:57,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 371 Invalid, 7 Unknown, 0 Unchecked, 3.55ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 20.27ms Time] [2021-11-13 18:34:57,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-13 18:34:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 520. [2021-11-13 18:34:57,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 1.5472061657032756) internal successors, (803), 519 states have internal predecessors, (803), 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) [2021-11-13 18:34:57,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 803 transitions. [2021-11-13 18:34:57,181 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 803 transitions. Word has length 66 [2021-11-13 18:34:57,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:57,182 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 803 transitions. [2021-11-13 18:34:57,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2021-11-13 18:34:57,183 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 803 transitions. [2021-11-13 18:34:57,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:34:57,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:57,191 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:57,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:34:57,191 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:57,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:57,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2021301796, now seen corresponding path program 1 times [2021-11-13 18:34:57,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:57,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621135578] [2021-11-13 18:34:57,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:57,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:34:57,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:57,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621135578] [2021-11-13 18:34:57,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621135578] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:57,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:57,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:34:57,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133059818] [2021-11-13 18:34:57,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:57,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:34:57,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:57,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:34:57,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:34:57,302 INFO L87 Difference]: Start difference. First operand 520 states and 803 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-13 18:34:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:57,387 INFO L93 Difference]: Finished difference Result 1388 states and 2173 transitions. [2021-11-13 18:34:57,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:34:57,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 67 [2021-11-13 18:34:57,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:57,398 INFO L225 Difference]: With dead ends: 1388 [2021-11-13 18:34:57,399 INFO L226 Difference]: Without dead ends: 906 [2021-11-13 18:34:57,400 INFO L932 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 [2021-11-13 18:34:57,405 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 101 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.72ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:57,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 362 Invalid, 7 Unknown, 0 Unchecked, 1.72ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 17.53ms Time] [2021-11-13 18:34:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-11-13 18:34:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 904. [2021-11-13 18:34:57,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 903 states have (on average 1.5492801771871538) internal successors, (1399), 903 states have internal predecessors, (1399), 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) [2021-11-13 18:34:57,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1399 transitions. [2021-11-13 18:34:57,494 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1399 transitions. Word has length 67 [2021-11-13 18:34:57,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:57,494 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 1399 transitions. [2021-11-13 18:34:57,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-13 18:34:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1399 transitions. [2021-11-13 18:34:57,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 18:34:57,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:57,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:57,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:34:57,497 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:57,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:57,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1960792892, now seen corresponding path program 1 times [2021-11-13 18:34:57,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:57,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254984492] [2021-11-13 18:34:57,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:57,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:34:57,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:57,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254984492] [2021-11-13 18:34:57,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254984492] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:57,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:57,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:34:57,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475278257] [2021-11-13 18:34:57,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:57,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:34:57,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:57,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:34:57,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:34:57,561 INFO L87 Difference]: Start difference. First operand 904 states and 1399 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-13 18:34:57,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:57,619 INFO L93 Difference]: Finished difference Result 2444 states and 3801 transitions. [2021-11-13 18:34:57,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:34:57,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-11-13 18:34:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:57,632 INFO L225 Difference]: With dead ends: 2444 [2021-11-13 18:34:57,632 INFO L226 Difference]: Without dead ends: 1578 [2021-11-13 18:34:57,634 INFO L932 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 [2021-11-13 18:34:57,638 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 96 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:57,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 353 Invalid, 7 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 12.27ms Time] [2021-11-13 18:34:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-11-13 18:34:57,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1576. [2021-11-13 18:34:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 1.5384126984126985) internal successors, (2423), 1575 states have internal predecessors, (2423), 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) [2021-11-13 18:34:57,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2423 transitions. [2021-11-13 18:34:57,712 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2423 transitions. Word has length 68 [2021-11-13 18:34:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:57,714 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 2423 transitions. [2021-11-13 18:34:57,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-13 18:34:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2423 transitions. [2021-11-13 18:34:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:34:57,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:57,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:57,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:34:57,716 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1083012428, now seen corresponding path program 1 times [2021-11-13 18:34:57,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:57,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895031811] [2021-11-13 18:34:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:57,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:34:57,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:57,846 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895031811] [2021-11-13 18:34:57,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895031811] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:57,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:57,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:34:57,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643118298] [2021-11-13 18:34:57,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:57,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:34:57,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:34:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:34:57,850 INFO L87 Difference]: Start difference. First operand 1576 states and 2423 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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) [2021-11-13 18:34:58,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:58,314 INFO L93 Difference]: Finished difference Result 10804 states and 16733 transitions. [2021-11-13 18:34:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:34:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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 69 [2021-11-13 18:34:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:58,374 INFO L225 Difference]: With dead ends: 10804 [2021-11-13 18:34:58,375 INFO L226 Difference]: Without dead ends: 9266 [2021-11-13 18:34:58,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:34:58,382 INFO L933 BasicCegarLoop]: 164 mSDtfsCounter, 1313 mSDsluCounter, 1591 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 62.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.74ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:58,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1313 Valid, 1755 Invalid, 96 Unknown, 0 Unchecked, 11.74ms Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 78.51ms Time] [2021-11-13 18:34:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9266 states. [2021-11-13 18:34:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9266 to 3112. [2021-11-13 18:34:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3112 states, 3111 states have (on average 1.5245901639344261) internal successors, (4743), 3111 states have internal predecessors, (4743), 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) [2021-11-13 18:34:58,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 4743 transitions. [2021-11-13 18:34:58,667 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 4743 transitions. Word has length 69 [2021-11-13 18:34:58,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:34:58,667 INFO L470 AbstractCegarLoop]: Abstraction has 3112 states and 4743 transitions. [2021-11-13 18:34:58,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 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) [2021-11-13 18:34:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 4743 transitions. [2021-11-13 18:34:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 18:34:58,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:34:58,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:34:58,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:34:58,669 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:34:58,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:34:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash 403029886, now seen corresponding path program 1 times [2021-11-13 18:34:58,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:34:58,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719093740] [2021-11-13 18:34:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:34:58,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:34:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:34:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:34:58,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:34:58,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719093740] [2021-11-13 18:34:58,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719093740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:34:58,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:34:58,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:34:58,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543164497] [2021-11-13 18:34:58,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:34:58,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:34:58,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:34:58,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:34:58,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:34:58,886 INFO L87 Difference]: Start difference. First operand 3112 states and 4743 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 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) [2021-11-13 18:34:59,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:34:59,734 INFO L93 Difference]: Finished difference Result 16722 states and 25228 transitions. [2021-11-13 18:34:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:34:59,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 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 70 [2021-11-13 18:34:59,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:34:59,842 INFO L225 Difference]: With dead ends: 16722 [2021-11-13 18:34:59,842 INFO L226 Difference]: Without dead ends: 13648 [2021-11-13 18:34:59,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:34:59,851 INFO L933 BasicCegarLoop]: 342 mSDtfsCounter, 828 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 870 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.01ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:34:59,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [828 Valid, 870 Invalid, 101 Unknown, 0 Unchecked, 7.01ms Time], IncrementalHoareTripleChecker [19 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 145.25ms Time] [2021-11-13 18:34:59,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13648 states. [2021-11-13 18:35:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13648 to 13640. [2021-11-13 18:35:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13640 states, 13639 states have (on average 1.4997433829459639) internal successors, (20455), 13639 states have internal predecessors, (20455), 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) [2021-11-13 18:35:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13640 states to 13640 states and 20455 transitions. [2021-11-13 18:35:00,810 INFO L78 Accepts]: Start accepts. Automaton has 13640 states and 20455 transitions. Word has length 70 [2021-11-13 18:35:00,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:00,810 INFO L470 AbstractCegarLoop]: Abstraction has 13640 states and 20455 transitions. [2021-11-13 18:35:00,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 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) [2021-11-13 18:35:00,811 INFO L276 IsEmpty]: Start isEmpty. Operand 13640 states and 20455 transitions. [2021-11-13 18:35:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-13 18:35:00,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:00,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:00,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:35:00,812 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:00,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:00,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1255275453, now seen corresponding path program 1 times [2021-11-13 18:35:00,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:00,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234406612] [2021-11-13 18:35:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:00,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:35:00,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:00,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234406612] [2021-11-13 18:35:00,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234406612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:00,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:00,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:35:00,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008937974] [2021-11-13 18:35:00,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:00,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:35:00,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:35:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:35:00,913 INFO L87 Difference]: Start difference. First operand 13640 states and 20455 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 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) [2021-11-13 18:35:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:02,640 INFO L93 Difference]: Finished difference Result 28522 states and 42152 transitions. [2021-11-13 18:35:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:35:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 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 71 [2021-11-13 18:35:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:02,722 INFO L225 Difference]: With dead ends: 28522 [2021-11-13 18:35:02,722 INFO L226 Difference]: Without dead ends: 28520 [2021-11-13 18:35:02,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:35:02,732 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 924 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.90ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:02,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 812 Invalid, 40 Unknown, 0 Unchecked, 4.90ms Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 33.60ms Time] [2021-11-13 18:35:02,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28520 states. [2021-11-13 18:35:03,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28520 to 14600. [2021-11-13 18:35:04,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14600 states, 14599 states have (on average 1.466881293239263) internal successors, (21415), 14599 states have internal predecessors, (21415), 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) [2021-11-13 18:35:04,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 21415 transitions. [2021-11-13 18:35:04,071 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 21415 transitions. Word has length 71 [2021-11-13 18:35:04,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:04,071 INFO L470 AbstractCegarLoop]: Abstraction has 14600 states and 21415 transitions. [2021-11-13 18:35:04,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 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) [2021-11-13 18:35:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 21415 transitions. [2021-11-13 18:35:04,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 18:35:04,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:04,074 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:04,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:35:04,075 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:04,076 INFO L85 PathProgramCache]: Analyzing trace with hash -206254681, now seen corresponding path program 1 times [2021-11-13 18:35:04,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:04,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484952502] [2021-11-13 18:35:04,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:04,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:35:04,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:04,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484952502] [2021-11-13 18:35:04,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484952502] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:04,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:04,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:35:04,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586199201] [2021-11-13 18:35:04,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:04,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:35:04,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:04,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:35:04,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:35:04,125 INFO L87 Difference]: Start difference. First operand 14600 states and 21415 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-13 18:35:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:05,345 INFO L93 Difference]: Finished difference Result 35518 states and 52155 transitions. [2021-11-13 18:35:05,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:35:05,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 72 [2021-11-13 18:35:05,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:05,396 INFO L225 Difference]: With dead ends: 35518 [2021-11-13 18:35:05,397 INFO L226 Difference]: Without dead ends: 20956 [2021-11-13 18:35:05,415 INFO L932 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 [2021-11-13 18:35:05,416 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 87 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:05,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 332 Invalid, 7 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 10.85ms Time] [2021-11-13 18:35:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20956 states. [2021-11-13 18:35:06,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20956 to 20954. [2021-11-13 18:35:06,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20954 states, 20953 states have (on average 1.4619863504032835) internal successors, (30633), 20953 states have internal predecessors, (30633), 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) [2021-11-13 18:35:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20954 states to 20954 states and 30633 transitions. [2021-11-13 18:35:06,642 INFO L78 Accepts]: Start accepts. Automaton has 20954 states and 30633 transitions. Word has length 72 [2021-11-13 18:35:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:06,642 INFO L470 AbstractCegarLoop]: Abstraction has 20954 states and 30633 transitions. [2021-11-13 18:35:06,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-11-13 18:35:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 20954 states and 30633 transitions. [2021-11-13 18:35:06,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 18:35:06,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:06,657 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 18:35:06,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:35:06,658 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:06,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1745394696, now seen corresponding path program 1 times [2021-11-13 18:35:06,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:06,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128585564] [2021-11-13 18:35:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:06,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:35:06,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:06,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128585564] [2021-11-13 18:35:06,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128585564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:35:06,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355897127] [2021-11-13 18:35:06,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:06,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:35:06,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:35:06,784 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:35:06,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:35:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:06,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:35:06,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:35:07,451 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:35:07,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:35:08,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:35:08,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355897127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:35:08,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:35:08,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 9 [2021-11-13 18:35:08,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843101960] [2021-11-13 18:35:08,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:35:08,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:35:08,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:35:08,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:35:08,282 INFO L87 Difference]: Start difference. First operand 20954 states and 30633 transitions. Second operand has 9 states, 9 states have (on average 28.77777777777778) internal successors, (259), 9 states have internal predecessors, (259), 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) [2021-11-13 18:35:10,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:10,836 INFO L93 Difference]: Finished difference Result 65081 states and 95795 transitions. [2021-11-13 18:35:10,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:35:10,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 28.77777777777778) internal successors, (259), 9 states have internal predecessors, (259), 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 99 [2021-11-13 18:35:10,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:10,962 INFO L225 Difference]: With dead ends: 65081 [2021-11-13 18:35:10,962 INFO L226 Difference]: Without dead ends: 50519 [2021-11-13 18:35:10,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:35:10,993 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 899 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.49ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:10,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 1290 Invalid, 49 Unknown, 0 Unchecked, 5.49ms Time], IncrementalHoareTripleChecker [8 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 70.93ms Time] [2021-11-13 18:35:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50519 states. [2021-11-13 18:35:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50519 to 47930. [2021-11-13 18:35:13,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47930 states, 47929 states have (on average 1.4583446347722673) internal successors, (69897), 47929 states have internal predecessors, (69897), 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) [2021-11-13 18:35:13,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47930 states to 47930 states and 69897 transitions. [2021-11-13 18:35:13,578 INFO L78 Accepts]: Start accepts. Automaton has 47930 states and 69897 transitions. Word has length 99 [2021-11-13 18:35:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:13,579 INFO L470 AbstractCegarLoop]: Abstraction has 47930 states and 69897 transitions. [2021-11-13 18:35:13,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 28.77777777777778) internal successors, (259), 9 states have internal predecessors, (259), 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) [2021-11-13 18:35:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 47930 states and 69897 transitions. [2021-11-13 18:35:13,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:35:13,596 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:13,596 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:13,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:35:13,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e2e3c536-a8c6-4356-bc72-ce5f89b7d5b5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:35:13,824 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash -152615028, now seen corresponding path program 1 times [2021-11-13 18:35:13,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:13,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778729656] [2021-11-13 18:35:13,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:13,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:35:13,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:13,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778729656] [2021-11-13 18:35:13,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778729656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:13,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:13,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:35:13,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916530240] [2021-11-13 18:35:13,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:13,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:35:13,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:13,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:35:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:35:13,955 INFO L87 Difference]: Start difference. First operand 47930 states and 69897 transitions. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 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) [2021-11-13 18:35:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:17,840 INFO L93 Difference]: Finished difference Result 114806 states and 168271 transitions. [2021-11-13 18:35:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:35:17,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 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 100 [2021-11-13 18:35:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:18,038 INFO L225 Difference]: With dead ends: 114806 [2021-11-13 18:35:18,038 INFO L226 Difference]: Without dead ends: 96308 [2021-11-13 18:35:18,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:35:18,077 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 1096 mSDsluCounter, 1179 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 66.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1096 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.57ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 83.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:18,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1096 Valid, 1477 Invalid, 106 Unknown, 0 Unchecked, 9.57ms Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 83.04ms Time] [2021-11-13 18:35:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96308 states. [2021-11-13 18:35:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96308 to 64314. [2021-11-13 18:35:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64314 states, 64313 states have (on average 1.4545270785066782) internal successors, (93545), 64313 states have internal predecessors, (93545), 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) [2021-11-13 18:35:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64314 states to 64314 states and 93545 transitions. [2021-11-13 18:35:21,607 INFO L78 Accepts]: Start accepts. Automaton has 64314 states and 93545 transitions. Word has length 100 [2021-11-13 18:35:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:21,607 INFO L470 AbstractCegarLoop]: Abstraction has 64314 states and 93545 transitions. [2021-11-13 18:35:21,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 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) [2021-11-13 18:35:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 64314 states and 93545 transitions. [2021-11-13 18:35:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:35:21,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:21,623 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:21,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:35:21,624 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:21,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:21,625 INFO L85 PathProgramCache]: Analyzing trace with hash 589805596, now seen corresponding path program 1 times [2021-11-13 18:35:21,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:21,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3091918] [2021-11-13 18:35:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:21,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:21,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:21,682 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:35:21,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:21,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3091918] [2021-11-13 18:35:21,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3091918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:21,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:21,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:35:21,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517814845] [2021-11-13 18:35:21,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:21,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:35:21,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:21,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:35:21,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:35:21,686 INFO L87 Difference]: Start difference. First operand 64314 states and 93545 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2021-11-13 18:35:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:26,614 INFO L93 Difference]: Finished difference Result 164925 states and 239645 transitions. [2021-11-13 18:35:26,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:35:26,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 100 [2021-11-13 18:35:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:26,829 INFO L225 Difference]: With dead ends: 164925 [2021-11-13 18:35:26,829 INFO L226 Difference]: Without dead ends: 108539 [2021-11-13 18:35:26,901 INFO L932 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 [2021-11-13 18:35:26,908 INFO L933 BasicCegarLoop]: 180 mSDtfsCounter, 87 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.94ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:26,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 334 Invalid, 9 Unknown, 0 Unchecked, 0.94ms Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 13.55ms Time] [2021-11-13 18:35:27,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108539 states. [2021-11-13 18:35:32,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108539 to 105337. [2021-11-13 18:35:32,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105337 states, 105336 states have (on average 1.4399160780739728) internal successors, (151675), 105336 states have internal predecessors, (151675), 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) [2021-11-13 18:35:32,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105337 states to 105337 states and 151675 transitions. [2021-11-13 18:35:32,534 INFO L78 Accepts]: Start accepts. Automaton has 105337 states and 151675 transitions. Word has length 100 [2021-11-13 18:35:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:35:32,534 INFO L470 AbstractCegarLoop]: Abstraction has 105337 states and 151675 transitions. [2021-11-13 18:35:32,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2021-11-13 18:35:32,535 INFO L276 IsEmpty]: Start isEmpty. Operand 105337 states and 151675 transitions. [2021-11-13 18:35:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:35:32,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:35:32,560 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:35:32,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:35:32,560 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:35:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:35:32,561 INFO L85 PathProgramCache]: Analyzing trace with hash -912723652, now seen corresponding path program 1 times [2021-11-13 18:35:32,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:35:32,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887486680] [2021-11-13 18:35:32,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:35:32,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:35:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:35:32,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:35:32,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:35:32,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887486680] [2021-11-13 18:35:32,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887486680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:35:32,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:35:32,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:35:32,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118115916] [2021-11-13 18:35:32,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:35:32,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:35:32,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:35:32,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:35:32,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:35:32,627 INFO L87 Difference]: Start difference. First operand 105337 states and 151675 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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) [2021-11-13 18:35:39,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:35:39,303 INFO L93 Difference]: Finished difference Result 203986 states and 293543 transitions. [2021-11-13 18:35:39,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:35:39,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 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 100 [2021-11-13 18:35:39,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:35:39,529 INFO L225 Difference]: With dead ends: 203986 [2021-11-13 18:35:39,530 INFO L226 Difference]: Without dead ends: 147280 [2021-11-13 18:35:39,583 INFO L932 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 [2021-11-13 18:35:39,584 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 89 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.01ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:35:39,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 360 Invalid, 9 Unknown, 0 Unchecked, 1.01ms Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 13.14ms Time] [2021-11-13 18:35:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147280 states.