./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3 --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 a92f0f2e799b323440c6f0b05c6a9c0af057fa0c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3 --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 a92f0f2e799b323440c6f0b05c6a9c0af057fa0c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:41:14,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:41:14,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:41:14,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:41:14,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:41:14,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:41:14,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:41:14,476 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:41:14,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:41:14,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:41:14,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:41:14,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:41:14,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:41:14,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:41:14,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:41:14,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:41:14,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:41:14,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:41:14,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:41:14,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:41:14,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:41:14,497 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:41:14,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:41:14,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:41:14,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:41:14,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:41:14,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:41:14,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:41:14,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:41:14,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:41:14,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:41:14,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:41:14,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:41:14,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:41:14,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:41:14,512 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:41:14,513 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:41:14,513 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:41:14,513 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:41:14,514 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:41:14,515 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:41:14,516 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-15 19:41:14,547 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:41:14,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:41:14,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:41:14,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:41:14,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:41:14,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:41:14,557 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:41:14,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:41:14,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:41:14,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 19:41:14,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:41:14,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:41:14,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:41:14,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:41:14,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:41:14,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:41:14,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:41:14,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:41:14,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:41:14,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:41:14,562 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:41:14,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:41:14,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:41:14,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:41:14,563 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:41:14,563 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:41:14,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 19:41:14,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 19:41:14,564 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:41:14,565 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:41:14,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:41:14,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:41:14,566 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_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92f0f2e799b323440c6f0b05c6a9c0af057fa0c [2021-10-15 19:41:14,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:41:14,902 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:41:14,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:41:14,907 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:41:14,908 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:41:14,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-15 19:41:15,002 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/data/bd1786d72/52ea19b70c2c430687a608a244bc575e/FLAG78fabc91d [2021-10-15 19:41:15,505 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:41:15,505 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-15 19:41:15,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/data/bd1786d72/52ea19b70c2c430687a608a244bc575e/FLAG78fabc91d [2021-10-15 19:41:15,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/data/bd1786d72/52ea19b70c2c430687a608a244bc575e [2021-10-15 19:41:15,850 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:41:15,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:41:15,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:41:15,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:41:15,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:41:15,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:41:15" (1/1) ... [2021-10-15 19:41:15,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38e4991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:15, skipping insertion in model container [2021-10-15 19:41:15,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:41:15" (1/1) ... [2021-10-15 19:41:15,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:41:15,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:41:16,162 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_1286921c-80f4-4997-8bed-63b6467da29e/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-15 19:41:16,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:41:16,178 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:41:16,230 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_1286921c-80f4-4997-8bed-63b6467da29e/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-15 19:41:16,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:41:16,246 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:41:16,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16 WrapperNode [2021-10-15 19:41:16,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:41:16,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:41:16,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:41:16,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:41:16,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (1/1) ... [2021-10-15 19:41:16,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (1/1) ... [2021-10-15 19:41:16,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:41:16,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:41:16,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:41:16,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:41:16,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (1/1) ... [2021-10-15 19:41:16,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (1/1) ... [2021-10-15 19:41:16,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (1/1) ... [2021-10-15 19:41:16,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (1/1) ... [2021-10-15 19:41:16,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (1/1) ... [2021-10-15 19:41:16,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (1/1) ... [2021-10-15 19:41:16,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (1/1) ... [2021-10-15 19:41:16,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:41:16,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:41:16,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:41:16,356 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:41:16,359 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (1/1) ... [2021-10-15 19:41:16,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:41:16,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:16,428 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:41:16,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:41:16,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 19:41:16,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:41:16,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:41:16,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:41:16,625 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-15 19:41:17,065 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-15 19:41:17,065 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-15 19:41:17,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:41:17,074 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:41:17,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:41:17 BoogieIcfgContainer [2021-10-15 19:41:17,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:41:17,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:41:17,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:41:17,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:41:17,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:41:15" (1/3) ... [2021-10-15 19:41:17,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3da1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:41:17, skipping insertion in model container [2021-10-15 19:41:17,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:16" (2/3) ... [2021-10-15 19:41:17,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3da1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:41:17, skipping insertion in model container [2021-10-15 19:41:17,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:41:17" (3/3) ... [2021-10-15 19:41:17,085 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2021-10-15 19:41:17,090 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:41:17,091 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:41:17,138 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:41:17,144 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, mConcurrency=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 [2021-10-15 19:41:17,144 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:41:17,160 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 125 places, 213 transitions, 426 flow [2021-10-15 19:41:17,255 INFO L129 PetriNetUnfolder]: 89/213 cut-off events. [2021-10-15 19:41:17,256 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:41:17,258 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 213 events. 89/213 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 363 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2021-10-15 19:41:17,258 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 213 transitions, 426 flow [2021-10-15 19:41:17,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 166 transitions, 332 flow [2021-10-15 19:41:17,297 INFO L129 PetriNetUnfolder]: 35/101 cut-off events. [2021-10-15 19:41:17,304 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:41:17,305 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:17,306 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 19:41:17,306 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:17,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1457697026, now seen corresponding path program 1 times [2021-10-15 19:41:17,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:17,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160263141] [2021-10-15 19:41:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:17,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:17,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:17,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160263141] [2021-10-15 19:41:17,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160263141] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:17,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:17,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:17,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558826698] [2021-10-15 19:41:17,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:17,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:17,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:17,632 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:17,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 166 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:17,637 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:17,637 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:17,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:17,949 INFO L129 PetriNetUnfolder]: 58/169 cut-off events. [2021-10-15 19:41:17,950 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:41:17,952 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 169 events. 58/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 229 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 11. Up to 86 conditions per place. [2021-10-15 19:41:17,956 INFO L132 encePairwiseOnDemand]: 209/213 looper letters, 86 selfloop transitions, 3 changer transitions 0/168 dead transitions. [2021-10-15 19:41:17,957 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 168 transitions, 514 flow [2021-10-15 19:41:17,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:17,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2021-10-15 19:41:17,978 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.704225352112676 [2021-10-15 19:41:17,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2021-10-15 19:41:17,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2021-10-15 19:41:17,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:17,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2021-10-15 19:41:17,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:17,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:17,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:17,998 INFO L186 Difference]: Start difference. First operand has 109 places, 166 transitions, 332 flow. Second operand 3 states and 450 transitions. [2021-10-15 19:41:17,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 168 transitions, 514 flow [2021-10-15 19:41:18,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 168 transitions, 514 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:41:18,010 INFO L242 Difference]: Finished difference. Result has 113 places, 167 transitions, 350 flow [2021-10-15 19:41:18,012 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=113, PETRI_TRANSITIONS=167} [2021-10-15 19:41:18,013 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 4 predicate places. [2021-10-15 19:41:18,013 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 167 transitions, 350 flow [2021-10-15 19:41:18,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,015 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:18,015 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:41:18,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 19:41:18,016 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash -611475394, now seen corresponding path program 1 times [2021-10-15 19:41:18,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:18,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53949864] [2021-10-15 19:41:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:18,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:18,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:18,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53949864] [2021-10-15 19:41:18,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53949864] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:18,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:18,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:18,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089815100] [2021-10-15 19:41:18,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:18,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:18,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:18,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:18,158 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:18,159 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 167 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,159 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:18,159 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:18,159 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:18,348 INFO L129 PetriNetUnfolder]: 65/195 cut-off events. [2021-10-15 19:41:18,349 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 19:41:18,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 195 events. 65/195 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 249 event pairs, 0 based on Foata normal form. 1/133 useless extension candidates. Maximal degree in co-relation 275. Up to 89 conditions per place. [2021-10-15 19:41:18,354 INFO L132 encePairwiseOnDemand]: 204/213 looper letters, 95 selfloop transitions, 3 changer transitions 0/177 dead transitions. [2021-10-15 19:41:18,354 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 177 transitions, 568 flow [2021-10-15 19:41:18,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2021-10-15 19:41:18,360 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7245696400625978 [2021-10-15 19:41:18,364 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2021-10-15 19:41:18,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2021-10-15 19:41:18,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:18,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2021-10-15 19:41:18,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 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) [2021-10-15 19:41:18,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,375 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,375 INFO L186 Difference]: Start difference. First operand has 113 places, 167 transitions, 350 flow. Second operand 3 states and 463 transitions. [2021-10-15 19:41:18,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 177 transitions, 568 flow [2021-10-15 19:41:18,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 177 transitions, 562 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:18,397 INFO L242 Difference]: Finished difference. Result has 115 places, 169 transitions, 376 flow [2021-10-15 19:41:18,398 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=115, PETRI_TRANSITIONS=169} [2021-10-15 19:41:18,398 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 6 predicate places. [2021-10-15 19:41:18,398 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 169 transitions, 376 flow [2021-10-15 19:41:18,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,399 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:18,399 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:18,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 19:41:18,400 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:18,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:18,406 INFO L82 PathProgramCache]: Analyzing trace with hash 432494245, now seen corresponding path program 1 times [2021-10-15 19:41:18,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:18,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813758626] [2021-10-15 19:41:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:18,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:41:18,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:18,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813758626] [2021-10-15 19:41:18,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813758626] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:18,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:18,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:18,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656611249] [2021-10-15 19:41:18,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:18,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:18,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:18,511 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:18,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 169 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:18,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:18,512 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:18,717 INFO L129 PetriNetUnfolder]: 72/223 cut-off events. [2021-10-15 19:41:18,717 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 19:41:18,718 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 223 events. 72/223 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 258 event pairs, 0 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 278. Up to 99 conditions per place. [2021-10-15 19:41:18,719 INFO L132 encePairwiseOnDemand]: 201/213 looper letters, 98 selfloop transitions, 5 changer transitions 0/182 dead transitions. [2021-10-15 19:41:18,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 182 transitions, 612 flow [2021-10-15 19:41:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:18,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2021-10-15 19:41:18,722 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7323943661971831 [2021-10-15 19:41:18,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2021-10-15 19:41:18,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2021-10-15 19:41:18,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:18,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2021-10-15 19:41:18,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,729 INFO L186 Difference]: Start difference. First operand has 115 places, 169 transitions, 376 flow. Second operand 3 states and 468 transitions. [2021-10-15 19:41:18,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 182 transitions, 612 flow [2021-10-15 19:41:18,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 182 transitions, 606 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:18,741 INFO L242 Difference]: Finished difference. Result has 117 places, 172 transitions, 418 flow [2021-10-15 19:41:18,742 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=117, PETRI_TRANSITIONS=172} [2021-10-15 19:41:18,742 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 8 predicate places. [2021-10-15 19:41:18,742 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 172 transitions, 418 flow [2021-10-15 19:41:18,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,744 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:18,744 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:41:18,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 19:41:18,746 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:18,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1155533614, now seen corresponding path program 1 times [2021-10-15 19:41:18,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:18,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809438289] [2021-10-15 19:41:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:18,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:41:18,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:18,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809438289] [2021-10-15 19:41:18,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809438289] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:18,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:18,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:18,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853038319] [2021-10-15 19:41:18,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:18,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:18,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:18,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:18,849 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 213 [2021-10-15 19:41:18,850 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 172 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,850 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:18,850 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 213 [2021-10-15 19:41:18,851 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:18,895 INFO L129 PetriNetUnfolder]: 78/251 cut-off events. [2021-10-15 19:41:18,895 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-10-15 19:41:18,895 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 251 events. 78/251 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 339 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 171. Up to 20 conditions per place. [2021-10-15 19:41:18,899 INFO L132 encePairwiseOnDemand]: 210/213 looper letters, 12 selfloop transitions, 2 changer transitions 0/173 dead transitions. [2021-10-15 19:41:18,899 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 173 transitions, 448 flow [2021-10-15 19:41:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2021-10-15 19:41:18,902 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9483568075117371 [2021-10-15 19:41:18,902 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2021-10-15 19:41:18,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2021-10-15 19:41:18,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:18,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2021-10-15 19:41:18,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,908 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,908 INFO L186 Difference]: Start difference. First operand has 117 places, 172 transitions, 418 flow. Second operand 3 states and 606 transitions. [2021-10-15 19:41:18,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 173 transitions, 448 flow [2021-10-15 19:41:18,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 173 transitions, 438 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:18,915 INFO L242 Difference]: Finished difference. Result has 118 places, 173 transitions, 420 flow [2021-10-15 19:41:18,915 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=420, PETRI_PLACES=118, PETRI_TRANSITIONS=173} [2021-10-15 19:41:18,915 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 9 predicate places. [2021-10-15 19:41:18,915 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 173 transitions, 420 flow [2021-10-15 19:41:18,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,916 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:18,917 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:41:18,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 19:41:18,917 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:18,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:18,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1474543958, now seen corresponding path program 1 times [2021-10-15 19:41:18,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:18,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588707735] [2021-10-15 19:41:18,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:18,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:41:18,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:18,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588707735] [2021-10-15 19:41:18,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588707735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:18,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:18,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:18,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327183883] [2021-10-15 19:41:18,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:18,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:18,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:18,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:18,985 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:18,985 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 173 transitions, 420 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:18,986 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:18,986 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:18,986 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:19,171 INFO L129 PetriNetUnfolder]: 89/312 cut-off events. [2021-10-15 19:41:19,172 INFO L130 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2021-10-15 19:41:19,173 INFO L84 FinitePrefix]: Finished finitePrefix Result has 545 conditions, 312 events. 89/312 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 582 event pairs, 0 based on Foata normal form. 5/240 useless extension candidates. Maximal degree in co-relation 368. Up to 117 conditions per place. [2021-10-15 19:41:19,175 INFO L132 encePairwiseOnDemand]: 175/213 looper letters, 120 selfloop transitions, 12 changer transitions 1/213 dead transitions. [2021-10-15 19:41:19,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 213 transitions, 788 flow [2021-10-15 19:41:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2021-10-15 19:41:19,178 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8043818466353677 [2021-10-15 19:41:19,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2021-10-15 19:41:19,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2021-10-15 19:41:19,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:19,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2021-10-15 19:41:19,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,184 INFO L186 Difference]: Start difference. First operand has 118 places, 173 transitions, 420 flow. Second operand 3 states and 514 transitions. [2021-10-15 19:41:19,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 213 transitions, 788 flow [2021-10-15 19:41:19,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 213 transitions, 786 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:19,196 INFO L242 Difference]: Finished difference. Result has 121 places, 179 transitions, 560 flow [2021-10-15 19:41:19,197 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=560, PETRI_PLACES=121, PETRI_TRANSITIONS=179} [2021-10-15 19:41:19,197 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 12 predicate places. [2021-10-15 19:41:19,197 INFO L470 AbstractCegarLoop]: Abstraction has has 121 places, 179 transitions, 560 flow [2021-10-15 19:41:19,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,198 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:19,198 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:41:19,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 19:41:19,199 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:19,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:19,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1014985004, now seen corresponding path program 1 times [2021-10-15 19:41:19,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:19,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891831331] [2021-10-15 19:41:19,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:19,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:41:19,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:19,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891831331] [2021-10-15 19:41:19,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891831331] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:19,279 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:19,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:19,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851037579] [2021-10-15 19:41:19,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:19,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:19,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:19,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:19,282 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:19,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 179 transitions, 560 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:19,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:19,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:19,435 INFO L129 PetriNetUnfolder]: 96/342 cut-off events. [2021-10-15 19:41:19,435 INFO L130 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2021-10-15 19:41:19,436 INFO L84 FinitePrefix]: Finished finitePrefix Result has 650 conditions, 342 events. 96/342 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 593 event pairs, 0 based on Foata normal form. 10/296 useless extension candidates. Maximal degree in co-relation 455. Up to 164 conditions per place. [2021-10-15 19:41:19,438 INFO L132 encePairwiseOnDemand]: 200/213 looper letters, 109 selfloop transitions, 4 changer transitions 0/193 dead transitions. [2021-10-15 19:41:19,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 193 transitions, 822 flow [2021-10-15 19:41:19,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:19,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2021-10-15 19:41:19,457 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7370892018779343 [2021-10-15 19:41:19,458 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2021-10-15 19:41:19,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2021-10-15 19:41:19,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:19,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2021-10-15 19:41:19,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,463 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,463 INFO L186 Difference]: Start difference. First operand has 121 places, 179 transitions, 560 flow. Second operand 3 states and 471 transitions. [2021-10-15 19:41:19,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 193 transitions, 822 flow [2021-10-15 19:41:19,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 193 transitions, 798 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:19,471 INFO L242 Difference]: Finished difference. Result has 123 places, 181 transitions, 582 flow [2021-10-15 19:41:19,471 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=582, PETRI_PLACES=123, PETRI_TRANSITIONS=181} [2021-10-15 19:41:19,472 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 14 predicate places. [2021-10-15 19:41:19,472 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 181 transitions, 582 flow [2021-10-15 19:41:19,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,473 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:19,473 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-10-15 19:41:19,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 19:41:19,473 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:19,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:19,474 INFO L82 PathProgramCache]: Analyzing trace with hash 362960642, now seen corresponding path program 1 times [2021-10-15 19:41:19,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:19,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90105295] [2021-10-15 19:41:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:19,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-15 19:41:19,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:19,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90105295] [2021-10-15 19:41:19,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90105295] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:19,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:19,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:19,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585030311] [2021-10-15 19:41:19,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:19,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:19,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:19,527 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:19,528 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 181 transitions, 582 flow. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,528 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:19,528 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:19,528 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:19,692 INFO L129 PetriNetUnfolder]: 102/372 cut-off events. [2021-10-15 19:41:19,692 INFO L130 PetriNetUnfolder]: For 157/157 co-relation queries the response was YES. [2021-10-15 19:41:19,694 INFO L84 FinitePrefix]: Finished finitePrefix Result has 711 conditions, 372 events. 102/372 cut-off events. For 157/157 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 552 event pairs, 0 based on Foata normal form. 12/322 useless extension candidates. Maximal degree in co-relation 516. Up to 178 conditions per place. [2021-10-15 19:41:19,696 INFO L132 encePairwiseOnDemand]: 198/213 looper letters, 113 selfloop transitions, 4 changer transitions 0/197 dead transitions. [2021-10-15 19:41:19,696 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 858 flow [2021-10-15 19:41:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:19,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2021-10-15 19:41:19,699 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7433489827856025 [2021-10-15 19:41:19,699 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2021-10-15 19:41:19,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2021-10-15 19:41:19,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:19,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2021-10-15 19:41:19,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,705 INFO L186 Difference]: Start difference. First operand has 123 places, 181 transitions, 582 flow. Second operand 3 states and 475 transitions. [2021-10-15 19:41:19,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 858 flow [2021-10-15 19:41:19,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 197 transitions, 848 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:19,713 INFO L242 Difference]: Finished difference. Result has 125 places, 183 transitions, 622 flow [2021-10-15 19:41:19,714 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=622, PETRI_PLACES=125, PETRI_TRANSITIONS=183} [2021-10-15 19:41:19,714 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 16 predicate places. [2021-10-15 19:41:19,714 INFO L470 AbstractCegarLoop]: Abstraction has has 125 places, 183 transitions, 622 flow [2021-10-15 19:41:19,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,715 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:19,715 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-10-15 19:41:19,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 19:41:19,716 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:19,716 INFO L82 PathProgramCache]: Analyzing trace with hash -941059334, now seen corresponding path program 1 times [2021-10-15 19:41:19,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:19,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780784969] [2021-10-15 19:41:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:19,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:41:19,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:19,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780784969] [2021-10-15 19:41:19,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780784969] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:19,772 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:19,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:19,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932983345] [2021-10-15 19:41:19,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:19,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:19,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:19,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:19,776 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 213 [2021-10-15 19:41:19,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 183 transitions, 622 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:19,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 213 [2021-10-15 19:41:19,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:19,879 INFO L129 PetriNetUnfolder]: 183/688 cut-off events. [2021-10-15 19:41:19,879 INFO L130 PetriNetUnfolder]: For 244/244 co-relation queries the response was YES. [2021-10-15 19:41:19,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1024 conditions, 688 events. 183/688 cut-off events. For 244/244 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2092 event pairs, 0 based on Foata normal form. 2/583 useless extension candidates. Maximal degree in co-relation 469. Up to 67 conditions per place. [2021-10-15 19:41:19,884 INFO L132 encePairwiseOnDemand]: 206/213 looper letters, 17 selfloop transitions, 3 changer transitions 0/189 dead transitions. [2021-10-15 19:41:19,885 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 189 transitions, 676 flow [2021-10-15 19:41:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:19,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2021-10-15 19:41:19,888 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9640062597809077 [2021-10-15 19:41:19,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2021-10-15 19:41:19,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2021-10-15 19:41:19,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:19,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2021-10-15 19:41:19,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,914 INFO L186 Difference]: Start difference. First operand has 125 places, 183 transitions, 622 flow. Second operand 3 states and 616 transitions. [2021-10-15 19:41:19,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 189 transitions, 676 flow [2021-10-15 19:41:19,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 189 transitions, 666 flow, removed 1 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:19,922 INFO L242 Difference]: Finished difference. Result has 126 places, 184 transitions, 635 flow [2021-10-15 19:41:19,923 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=635, PETRI_PLACES=126, PETRI_TRANSITIONS=184} [2021-10-15 19:41:19,923 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 17 predicate places. [2021-10-15 19:41:19,924 INFO L470 AbstractCegarLoop]: Abstraction has has 126 places, 184 transitions, 635 flow [2021-10-15 19:41:19,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:19,924 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:19,924 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:19,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 19:41:19,925 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:19,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:19,926 INFO L82 PathProgramCache]: Analyzing trace with hash 726600603, now seen corresponding path program 1 times [2021-10-15 19:41:19,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:19,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576488638] [2021-10-15 19:41:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:19,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:19,996 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-15 19:41:19,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:19,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576488638] [2021-10-15 19:41:19,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576488638] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:19,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:19,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:19,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376412049] [2021-10-15 19:41:19,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:19,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:19,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:19,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:20,000 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 213 [2021-10-15 19:41:20,001 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 184 transitions, 635 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,002 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:20,002 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 213 [2021-10-15 19:41:20,002 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:20,108 INFO L129 PetriNetUnfolder]: 190/721 cut-off events. [2021-10-15 19:41:20,109 INFO L130 PetriNetUnfolder]: For 258/258 co-relation queries the response was YES. [2021-10-15 19:41:20,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1075 conditions, 721 events. 190/721 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2267 event pairs, 1 based on Foata normal form. 1/615 useless extension candidates. Maximal degree in co-relation 820. Up to 70 conditions per place. [2021-10-15 19:41:20,114 INFO L132 encePairwiseOnDemand]: 210/213 looper letters, 14 selfloop transitions, 2 changer transitions 0/185 dead transitions. [2021-10-15 19:41:20,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 185 transitions, 673 flow [2021-10-15 19:41:20,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2021-10-15 19:41:20,117 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9483568075117371 [2021-10-15 19:41:20,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2021-10-15 19:41:20,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2021-10-15 19:41:20,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:20,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2021-10-15 19:41:20,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,123 INFO L186 Difference]: Start difference. First operand has 126 places, 184 transitions, 635 flow. Second operand 3 states and 606 transitions. [2021-10-15 19:41:20,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 185 transitions, 673 flow [2021-10-15 19:41:20,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 185 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:20,132 INFO L242 Difference]: Finished difference. Result has 128 places, 185 transitions, 648 flow [2021-10-15 19:41:20,133 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=648, PETRI_PLACES=128, PETRI_TRANSITIONS=185} [2021-10-15 19:41:20,133 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 19 predicate places. [2021-10-15 19:41:20,133 INFO L470 AbstractCegarLoop]: Abstraction has has 128 places, 185 transitions, 648 flow [2021-10-15 19:41:20,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,134 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:20,134 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:20,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 19:41:20,135 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:20,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:20,135 INFO L82 PathProgramCache]: Analyzing trace with hash -160267774, now seen corresponding path program 1 times [2021-10-15 19:41:20,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:20,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726794269] [2021-10-15 19:41:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:20,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-15 19:41:20,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:20,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726794269] [2021-10-15 19:41:20,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726794269] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:20,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:20,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:20,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190873161] [2021-10-15 19:41:20,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:20,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:20,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:20,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:20,210 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 213 [2021-10-15 19:41:20,211 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 185 transitions, 648 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,211 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:20,211 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 213 [2021-10-15 19:41:20,211 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:20,326 INFO L129 PetriNetUnfolder]: 195/753 cut-off events. [2021-10-15 19:41:20,326 INFO L130 PetriNetUnfolder]: For 272/272 co-relation queries the response was YES. [2021-10-15 19:41:20,328 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 753 events. 195/753 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2494 event pairs, 0 based on Foata normal form. 1/642 useless extension candidates. Maximal degree in co-relation 1051. Up to 75 conditions per place. [2021-10-15 19:41:20,332 INFO L132 encePairwiseOnDemand]: 210/213 looper letters, 14 selfloop transitions, 3 changer transitions 0/186 dead transitions. [2021-10-15 19:41:20,332 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 186 transitions, 686 flow [2021-10-15 19:41:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:20,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2021-10-15 19:41:20,335 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9483568075117371 [2021-10-15 19:41:20,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2021-10-15 19:41:20,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2021-10-15 19:41:20,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:20,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2021-10-15 19:41:20,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,341 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,341 INFO L186 Difference]: Start difference. First operand has 128 places, 185 transitions, 648 flow. Second operand 3 states and 606 transitions. [2021-10-15 19:41:20,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 186 transitions, 686 flow [2021-10-15 19:41:20,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 186 transitions, 682 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:20,351 INFO L242 Difference]: Finished difference. Result has 130 places, 186 transitions, 661 flow [2021-10-15 19:41:20,352 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=661, PETRI_PLACES=130, PETRI_TRANSITIONS=186} [2021-10-15 19:41:20,352 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 21 predicate places. [2021-10-15 19:41:20,353 INFO L470 AbstractCegarLoop]: Abstraction has has 130 places, 186 transitions, 661 flow [2021-10-15 19:41:20,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,353 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:20,354 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:20,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 19:41:20,354 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:20,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:20,356 INFO L82 PathProgramCache]: Analyzing trace with hash -26254268, now seen corresponding path program 1 times [2021-10-15 19:41:20,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:20,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944248838] [2021-10-15 19:41:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:20,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-15 19:41:20,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:20,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944248838] [2021-10-15 19:41:20,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944248838] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:20,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:20,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:20,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596622305] [2021-10-15 19:41:20,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:20,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:20,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:20,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:20,432 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 213 [2021-10-15 19:41:20,433 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 186 transitions, 661 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,433 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:20,433 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 213 [2021-10-15 19:41:20,433 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:20,601 INFO L129 PetriNetUnfolder]: 286/1081 cut-off events. [2021-10-15 19:41:20,602 INFO L130 PetriNetUnfolder]: For 449/449 co-relation queries the response was YES. [2021-10-15 19:41:20,604 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1645 conditions, 1081 events. 286/1081 cut-off events. For 449/449 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3518 event pairs, 0 based on Foata normal form. 1/928 useless extension candidates. Maximal degree in co-relation 1007. Up to 105 conditions per place. [2021-10-15 19:41:20,610 INFO L132 encePairwiseOnDemand]: 206/213 looper letters, 22 selfloop transitions, 6 changer transitions 0/197 dead transitions. [2021-10-15 19:41:20,610 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 197 transitions, 768 flow [2021-10-15 19:41:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2021-10-15 19:41:20,613 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9640062597809077 [2021-10-15 19:41:20,613 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2021-10-15 19:41:20,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2021-10-15 19:41:20,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:20,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2021-10-15 19:41:20,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,621 INFO L186 Difference]: Start difference. First operand has 130 places, 186 transitions, 661 flow. Second operand 3 states and 616 transitions. [2021-10-15 19:41:20,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 197 transitions, 768 flow [2021-10-15 19:41:20,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 197 transitions, 762 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:20,631 INFO L242 Difference]: Finished difference. Result has 133 places, 191 transitions, 722 flow [2021-10-15 19:41:20,632 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=722, PETRI_PLACES=133, PETRI_TRANSITIONS=191} [2021-10-15 19:41:20,633 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 24 predicate places. [2021-10-15 19:41:20,633 INFO L470 AbstractCegarLoop]: Abstraction has has 133 places, 191 transitions, 722 flow [2021-10-15 19:41:20,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,633 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:20,634 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:20,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 19:41:20,634 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:20,635 INFO L82 PathProgramCache]: Analyzing trace with hash 2111720797, now seen corresponding path program 1 times [2021-10-15 19:41:20,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:20,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628948505] [2021-10-15 19:41:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:20,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:20,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:20,696 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-10-15 19:41:20,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:20,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628948505] [2021-10-15 19:41:20,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628948505] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:20,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:20,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:20,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826764770] [2021-10-15 19:41:20,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:20,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:20,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:20,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:20,700 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:20,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 191 transitions, 722 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:20,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:20,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:20,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:21,086 INFO L129 PetriNetUnfolder]: 361/1282 cut-off events. [2021-10-15 19:41:21,087 INFO L130 PetriNetUnfolder]: For 774/774 co-relation queries the response was YES. [2021-10-15 19:41:21,090 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2683 conditions, 1282 events. 361/1282 cut-off events. For 774/774 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4079 event pairs, 0 based on Foata normal form. 33/1149 useless extension candidates. Maximal degree in co-relation 1804. Up to 384 conditions per place. [2021-10-15 19:41:21,097 INFO L132 encePairwiseOnDemand]: 173/213 looper letters, 126 selfloop transitions, 31 changer transitions 1/246 dead transitions. [2021-10-15 19:41:21,097 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 246 transitions, 1226 flow [2021-10-15 19:41:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:21,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:21,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2021-10-15 19:41:21,100 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8043818466353677 [2021-10-15 19:41:21,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2021-10-15 19:41:21,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2021-10-15 19:41:21,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:21,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2021-10-15 19:41:21,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,105 INFO L186 Difference]: Start difference. First operand has 133 places, 191 transitions, 722 flow. Second operand 3 states and 514 transitions. [2021-10-15 19:41:21,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 246 transitions, 1226 flow [2021-10-15 19:41:21,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 246 transitions, 1214 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:21,117 INFO L242 Difference]: Finished difference. Result has 135 places, 212 transitions, 1008 flow [2021-10-15 19:41:21,117 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1008, PETRI_PLACES=135, PETRI_TRANSITIONS=212} [2021-10-15 19:41:21,118 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 26 predicate places. [2021-10-15 19:41:21,118 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 212 transitions, 1008 flow [2021-10-15 19:41:21,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,118 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:21,119 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:21,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-15 19:41:21,119 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:21,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:21,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1480770973, now seen corresponding path program 2 times [2021-10-15 19:41:21,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:21,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799775651] [2021-10-15 19:41:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:21,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:21,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-10-15 19:41:21,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:21,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799775651] [2021-10-15 19:41:21,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799775651] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:21,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:21,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:21,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783543928] [2021-10-15 19:41:21,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:21,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:21,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:21,191 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:21,191 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 212 transitions, 1008 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:21,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:21,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:21,656 INFO L129 PetriNetUnfolder]: 424/1602 cut-off events. [2021-10-15 19:41:21,656 INFO L130 PetriNetUnfolder]: For 2052/2052 co-relation queries the response was YES. [2021-10-15 19:41:21,661 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3710 conditions, 1602 events. 424/1602 cut-off events. For 2052/2052 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5739 event pairs, 0 based on Foata normal form. 120/1529 useless extension candidates. Maximal degree in co-relation 2454. Up to 509 conditions per place. [2021-10-15 19:41:21,669 INFO L132 encePairwiseOnDemand]: 174/213 looper letters, 151 selfloop transitions, 21 changer transitions 0/260 dead transitions. [2021-10-15 19:41:21,670 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 260 transitions, 1564 flow [2021-10-15 19:41:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:21,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 515 transitions. [2021-10-15 19:41:21,676 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.8059467918622848 [2021-10-15 19:41:21,676 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 515 transitions. [2021-10-15 19:41:21,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 515 transitions. [2021-10-15 19:41:21,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:21,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 515 transitions. [2021-10-15 19:41:21,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,682 INFO L186 Difference]: Start difference. First operand has 135 places, 212 transitions, 1008 flow. Second operand 3 states and 515 transitions. [2021-10-15 19:41:21,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 260 transitions, 1564 flow [2021-10-15 19:41:21,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 260 transitions, 1498 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:21,697 INFO L242 Difference]: Finished difference. Result has 137 places, 226 transitions, 1268 flow [2021-10-15 19:41:21,698 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1268, PETRI_PLACES=137, PETRI_TRANSITIONS=226} [2021-10-15 19:41:21,698 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 28 predicate places. [2021-10-15 19:41:21,698 INFO L470 AbstractCegarLoop]: Abstraction has has 137 places, 226 transitions, 1268 flow [2021-10-15 19:41:21,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,699 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:21,699 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:21,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 19:41:21,700 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:21,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1483315329, now seen corresponding path program 1 times [2021-10-15 19:41:21,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:21,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367280642] [2021-10-15 19:41:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:21,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-15 19:41:21,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 19:41:21,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367280642] [2021-10-15 19:41:21,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367280642] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:21,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:21,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 19:41:21,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884873852] [2021-10-15 19:41:21,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:21,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 19:41:21,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:21,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:21,811 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 213 [2021-10-15 19:41:21,812 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 226 transitions, 1268 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:21,812 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:21,812 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 213 [2021-10-15 19:41:21,812 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:22,130 INFO L129 PetriNetUnfolder]: 546/2082 cut-off events. [2021-10-15 19:41:22,130 INFO L130 PetriNetUnfolder]: For 2681/2681 co-relation queries the response was YES. [2021-10-15 19:41:22,136 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3799 conditions, 2082 events. 546/2082 cut-off events. For 2681/2681 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 8789 event pairs, 0 based on Foata normal form. 0/1833 useless extension candidates. Maximal degree in co-relation 2605. Up to 247 conditions per place. [2021-10-15 19:41:22,147 INFO L132 encePairwiseOnDemand]: 211/213 looper letters, 5 selfloop transitions, 1 changer transitions 0/228 dead transitions. [2021-10-15 19:41:22,147 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 228 transitions, 1284 flow [2021-10-15 19:41:22,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:22,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2021-10-15 19:41:22,151 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9780907668231612 [2021-10-15 19:41:22,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2021-10-15 19:41:22,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2021-10-15 19:41:22,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:22,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2021-10-15 19:41:22,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:22,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:22,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:22,158 INFO L186 Difference]: Start difference. First operand has 137 places, 226 transitions, 1268 flow. Second operand 3 states and 625 transitions. [2021-10-15 19:41:22,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 228 transitions, 1284 flow [2021-10-15 19:41:22,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 228 transitions, 1242 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:22,175 INFO L242 Difference]: Finished difference. Result has 139 places, 227 transitions, 1236 flow [2021-10-15 19:41:22,176 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1236, PETRI_PLACES=139, PETRI_TRANSITIONS=227} [2021-10-15 19:41:22,176 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 30 predicate places. [2021-10-15 19:41:22,176 INFO L470 AbstractCegarLoop]: Abstraction has has 139 places, 227 transitions, 1236 flow [2021-10-15 19:41:22,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:22,177 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:22,177 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:22,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 19:41:22,178 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:22,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:22,178 INFO L82 PathProgramCache]: Analyzing trace with hash -319918519, now seen corresponding path program 1 times [2021-10-15 19:41:22,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 19:41:22,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934452830] [2021-10-15 19:41:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:22,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 19:41:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:41:22,260 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:41:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:41:22,453 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 19:41:22,454 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:41:22,455 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:41:22,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 19:41:22,463 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:41:22,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:41:22 BoogieIcfgContainer [2021-10-15 19:41:22,632 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:41:22,633 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:41:22,633 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:41:22,633 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:41:22,634 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:41:17" (3/4) ... [2021-10-15 19:41:22,637 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 19:41:22,637 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:41:22,639 INFO L168 Benchmark]: Toolchain (without parser) took 6786.72 ms. Allocated memory was 94.4 MB in the beginning and 182.5 MB in the end (delta: 88.1 MB). Free memory was 59.4 MB in the beginning and 62.1 MB in the end (delta: -2.8 MB). Peak memory consumption was 85.6 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:22,639 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 64.0 MB in the beginning and 64.0 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:41:22,640 INFO L168 Benchmark]: CACSL2BoogieTranslator took 393.10 ms. Allocated memory was 94.4 MB in the beginning and 125.8 MB in the end (delta: 31.5 MB). Free memory was 59.4 MB in the beginning and 97.7 MB in the end (delta: -38.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:22,643 INFO L168 Benchmark]: Boogie Procedure Inliner took 63.76 ms. Allocated memory is still 125.8 MB. Free memory was 97.7 MB in the beginning and 95.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:22,643 INFO L168 Benchmark]: Boogie Preprocessor took 41.84 ms. Allocated memory is still 125.8 MB. Free memory was 95.0 MB in the beginning and 92.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:22,643 INFO L168 Benchmark]: RCFGBuilder took 721.39 ms. Allocated memory is still 125.8 MB. Free memory was 92.9 MB in the beginning and 68.9 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:22,644 INFO L168 Benchmark]: TraceAbstraction took 5554.34 ms. Allocated memory was 125.8 MB in the beginning and 182.5 MB in the end (delta: 56.6 MB). Free memory was 68.1 MB in the beginning and 63.2 MB in the end (delta: 4.9 MB). Peak memory consumption was 63.3 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:22,644 INFO L168 Benchmark]: Witness Printer took 4.11 ms. Allocated memory is still 182.5 MB. Free memory was 63.2 MB in the beginning and 62.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:22,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 94.4 MB. Free memory was 64.0 MB in the beginning and 64.0 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 393.10 ms. Allocated memory was 94.4 MB in the beginning and 125.8 MB in the end (delta: 31.5 MB). Free memory was 59.4 MB in the beginning and 97.7 MB in the end (delta: -38.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 63.76 ms. Allocated memory is still 125.8 MB. Free memory was 97.7 MB in the beginning and 95.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.84 ms. Allocated memory is still 125.8 MB. Free memory was 95.0 MB in the beginning and 92.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 721.39 ms. Allocated memory is still 125.8 MB. Free memory was 92.9 MB in the beginning and 68.9 MB in the end (delta: 24.1 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5554.34 ms. Allocated memory was 125.8 MB in the beginning and 182.5 MB in the end (delta: 56.6 MB). Free memory was 68.1 MB in the beginning and 63.2 MB in the end (delta: 4.9 MB). Peak memory consumption was 63.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.11 ms. Allocated memory is still 182.5 MB. Free memory was 63.2 MB in the beginning and 62.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 609]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseXor at line 357. Possible FailurePath: [L618] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 = __VERIFIER_nondet_int(); [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_uint(); [L28] unsigned int s__ctx__stats__sess_connect = __VERIFIER_nondet_uint(); [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags = __VERIFIER_nondet_int(); [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 = __VERIFIER_nondet_int(); [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y = __VERIFIER_nondet_int(); [L65] int __retres59 ; [L68] s__state = 12292 [L69] blastFlag = 0 [L70] tmp = __VERIFIER_nondet_int() [L71] cb = 0 [L72] ret = -1 [L73] skip = 0 [L74] tmp___0 = 0 [L75] COND TRUE s__info_callback != 0 [L76] cb = s__info_callback [L84] s__in_handshake = s__in_handshake + 1 [L85] COND FALSE !(tmp___1 - 12288) [L95] COND TRUE 1 [L97] state = s__state [L98] COND TRUE s__state == 12292 [L201] s__new_session = 1 [L202] s__state = 4096 [L203] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L208] s__server = 0 [L209] COND TRUE cb != 0 [L214] COND FALSE !(s__version - 65280 != 768) [L220] s__type = 4096 [L221] COND FALSE !(s__init_buf___0 == 0) [L239] COND FALSE !(! tmp___4) [L245] COND FALSE !(! tmp___5) [L251] s__state = 4368 [L252] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L253] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND TRUE blastFlag == 0 [L260] blastFlag = 1 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND FALSE !(s__bbio != s__wbio) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND TRUE blastFlag == 1 [L285] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND TRUE blastFlag == 2 [L308] blastFlag = 3 [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND TRUE blastFlag == 3 [L325] blastFlag = 4 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND FALSE !(blastFlag == 5) [L352] COND FALSE !(ret <= 0) [L357] s__state = ag_X ^ ag_Y [L358] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND FALSE !(blastFlag == 0) [L262] COND TRUE blastFlag == 4 [L263] blastFlag = 5 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND FALSE !(s__bbio != s__wbio) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND FALSE !(blastFlag == 1) [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND FALSE !(blastFlag == 2) [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND FALSE !(blastFlag == 3) [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND TRUE blastFlag == 5 [L609] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 125 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 31.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5327.3ms, OverallIterations: 15, TraceHistogramMax: 11, EmptinessCheckTime: 0.0ms, AutomataDifference: 3460.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 128.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 638 SDtfs, 137 SDslu, 0 SDs, 0 SdLazy, 899 SolverSat, 169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 870.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1268occurred in iteration=13, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 92.3ms SsaConstructionTime, 435.1ms SatisfiabilityAnalysisTime, 702.0ms InterpolantComputationTime, 1559 NumberOfCodeBlocks, 1559 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 1349 ConstructedInterpolants, 0 QuantifiedInterpolants, 2691 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2354/2354 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-15 19:41:22,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-15 19:41:25,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 19:41:25,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 19:41:25,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 19:41:25,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 19:41:25,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 19:41:25,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 19:41:25,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 19:41:25,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 19:41:25,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 19:41:25,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 19:41:25,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 19:41:25,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 19:41:25,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 19:41:25,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 19:41:25,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 19:41:25,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 19:41:25,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 19:41:25,264 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 19:41:25,275 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 19:41:25,277 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 19:41:25,278 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 19:41:25,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 19:41:25,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 19:41:25,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 19:41:25,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 19:41:25,293 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 19:41:25,295 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 19:41:25,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 19:41:25,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 19:41:25,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 19:41:25,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 19:41:25,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 19:41:25,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 19:41:25,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 19:41:25,303 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 19:41:25,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 19:41:25,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 19:41:25,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 19:41:25,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 19:41:25,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 19:41:25,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-10-15 19:41:25,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 19:41:25,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 19:41:25,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 19:41:25,355 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 19:41:25,357 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 19:41:25,357 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 19:41:25,357 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 19:41:25,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 19:41:25,359 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 19:41:25,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 19:41:25,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 19:41:25,360 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-15 19:41:25,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 19:41:25,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-15 19:41:25,361 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 19:41:25,362 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 19:41:25,362 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 19:41:25,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-15 19:41:25,362 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 19:41:25,363 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-15 19:41:25,363 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 19:41:25,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 19:41:25,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 19:41:25,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:41:25,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 19:41:25,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 19:41:25,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-15 19:41:25,365 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 19:41:25,365 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 19:41:25,365 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-15 19:41:25,366 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-15 19:41:25,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-15 19:41:25,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 19:41:25,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 19:41:25,367 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a92f0f2e799b323440c6f0b05c6a9c0af057fa0c [2021-10-15 19:41:25,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 19:41:25,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 19:41:25,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 19:41:25,747 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 19:41:25,748 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 19:41:25,749 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-15 19:41:25,817 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/data/8e850954a/03185e0d99354fb89b38d2ca6ea284fa/FLAGa950db932 [2021-10-15 19:41:26,399 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 19:41:26,400 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c [2021-10-15 19:41:26,416 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/data/8e850954a/03185e0d99354fb89b38d2ca6ea284fa/FLAGa950db932 [2021-10-15 19:41:26,702 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/data/8e850954a/03185e0d99354fb89b38d2ca6ea284fa [2021-10-15 19:41:26,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 19:41:26,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-15 19:41:26,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 19:41:26,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 19:41:26,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 19:41:26,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:41:26" (1/1) ... [2021-10-15 19:41:26,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e86cbf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:26, skipping insertion in model container [2021-10-15 19:41:26,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 07:41:26" (1/1) ... [2021-10-15 19:41:26,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 19:41:26,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 19:41:27,078 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_1286921c-80f4-4997-8bed-63b6467da29e/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-15 19:41:27,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:41:27,154 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 19:41:27,235 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_1286921c-80f4-4997-8bed-63b6467da29e/sv-benchmarks/c/bitvector/s3_clnt_2.BV.c.cil-2a.c[37311,37324] [2021-10-15 19:41:27,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 19:41:27,261 INFO L208 MainTranslator]: Completed translation [2021-10-15 19:41:27,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27 WrapperNode [2021-10-15 19:41:27,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 19:41:27,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-15 19:41:27,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-15 19:41:27,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-15 19:41:27,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (1/1) ... [2021-10-15 19:41:27,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (1/1) ... [2021-10-15 19:41:27,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-15 19:41:27,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 19:41:27,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 19:41:27,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 19:41:27,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (1/1) ... [2021-10-15 19:41:27,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (1/1) ... [2021-10-15 19:41:27,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (1/1) ... [2021-10-15 19:41:27,370 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (1/1) ... [2021-10-15 19:41:27,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (1/1) ... [2021-10-15 19:41:27,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (1/1) ... [2021-10-15 19:41:27,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (1/1) ... [2021-10-15 19:41:27,393 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 19:41:27,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 19:41:27,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 19:41:27,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 19:41:27,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (1/1) ... [2021-10-15 19:41:27,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 19:41:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 19:41:27,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 19:41:27,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 19:41:27,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 19:41:27,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 19:41:27,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 19:41:27,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 19:41:27,642 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-10-15 19:41:28,133 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##85: assume !false; [2021-10-15 19:41:28,134 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume false; [2021-10-15 19:41:28,142 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 19:41:28,143 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-15 19:41:28,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:41:28 BoogieIcfgContainer [2021-10-15 19:41:28,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 19:41:28,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 19:41:28,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 19:41:28,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 19:41:28,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 07:41:26" (1/3) ... [2021-10-15 19:41:28,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2428be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:41:28, skipping insertion in model container [2021-10-15 19:41:28,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 07:41:27" (2/3) ... [2021-10-15 19:41:28,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2428be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 07:41:28, skipping insertion in model container [2021-10-15 19:41:28,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:41:28" (3/3) ... [2021-10-15 19:41:28,163 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_clnt_2.BV.c.cil-2a.c [2021-10-15 19:41:28,168 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 19:41:28,176 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-15 19:41:28,238 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 19:41:28,244 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, mConcurrency=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 [2021-10-15 19:41:28,244 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-15 19:41:28,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 125 places, 213 transitions, 426 flow [2021-10-15 19:41:28,356 INFO L129 PetriNetUnfolder]: 89/213 cut-off events. [2021-10-15 19:41:28,356 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:41:28,357 INFO L84 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 213 events. 89/213 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 363 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2021-10-15 19:41:28,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 213 transitions, 426 flow [2021-10-15 19:41:28,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 166 transitions, 332 flow [2021-10-15 19:41:28,385 INFO L129 PetriNetUnfolder]: 35/101 cut-off events. [2021-10-15 19:41:28,386 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:41:28,386 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:28,387 INFO L254 CegarLoopForPetriNet]: 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] [2021-10-15 19:41:28,387 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:28,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:28,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1457697026, now seen corresponding path program 1 times [2021-10-15 19:41:28,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:28,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667584885] [2021-10-15 19:41:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:28,406 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:28,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:28,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:28,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 19:41:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:28,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:28,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:28,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:28,807 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:28,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667584885] [2021-10-15 19:41:28,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667584885] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:28,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:28,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 19:41:28,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321552389] [2021-10-15 19:41:28,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:28,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:28,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:28,838 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:28,842 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 166 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:28,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:28,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:28,844 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:29,040 INFO L129 PetriNetUnfolder]: 58/169 cut-off events. [2021-10-15 19:41:29,040 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-10-15 19:41:29,042 INFO L84 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 169 events. 58/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 229 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 11. Up to 86 conditions per place. [2021-10-15 19:41:29,047 INFO L132 encePairwiseOnDemand]: 209/213 looper letters, 86 selfloop transitions, 3 changer transitions 0/168 dead transitions. [2021-10-15 19:41:29,048 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 168 transitions, 514 flow [2021-10-15 19:41:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:29,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:29,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2021-10-15 19:41:29,071 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.704225352112676 [2021-10-15 19:41:29,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2021-10-15 19:41:29,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2021-10-15 19:41:29,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:29,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2021-10-15 19:41:29,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,099 INFO L186 Difference]: Start difference. First operand has 109 places, 166 transitions, 332 flow. Second operand 3 states and 450 transitions. [2021-10-15 19:41:29,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 168 transitions, 514 flow [2021-10-15 19:41:29,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 168 transitions, 514 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:41:29,112 INFO L242 Difference]: Finished difference. Result has 113 places, 167 transitions, 350 flow [2021-10-15 19:41:29,114 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=350, PETRI_PLACES=113, PETRI_TRANSITIONS=167} [2021-10-15 19:41:29,115 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 4 predicate places. [2021-10-15 19:41:29,115 INFO L470 AbstractCegarLoop]: Abstraction has has 113 places, 167 transitions, 350 flow [2021-10-15 19:41:29,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,116 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:29,117 INFO L254 CegarLoopForPetriNet]: trace histogram [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] [2021-10-15 19:41:29,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:29,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:29,337 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:29,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:29,338 INFO L82 PathProgramCache]: Analyzing trace with hash -611475394, now seen corresponding path program 1 times [2021-10-15 19:41:29,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:29,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529413303] [2021-10-15 19:41:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:29,339 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:29,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:29,341 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:29,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 19:41:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:29,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:29,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:29,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 19:41:29,718 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:29,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529413303] [2021-10-15 19:41:29,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529413303] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:29,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:29,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 19:41:29,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133471230] [2021-10-15 19:41:29,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:29,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:29,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:29,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:29,724 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:29,725 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 167 transitions, 350 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,726 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:29,726 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:29,726 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:29,908 INFO L129 PetriNetUnfolder]: 65/195 cut-off events. [2021-10-15 19:41:29,914 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-10-15 19:41:29,916 INFO L84 FinitePrefix]: Finished finitePrefix Result has 307 conditions, 195 events. 65/195 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 249 event pairs, 0 based on Foata normal form. 1/133 useless extension candidates. Maximal degree in co-relation 275. Up to 89 conditions per place. [2021-10-15 19:41:29,917 INFO L132 encePairwiseOnDemand]: 204/213 looper letters, 95 selfloop transitions, 3 changer transitions 0/177 dead transitions. [2021-10-15 19:41:29,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 177 transitions, 568 flow [2021-10-15 19:41:29,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2021-10-15 19:41:29,920 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7245696400625978 [2021-10-15 19:41:29,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2021-10-15 19:41:29,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2021-10-15 19:41:29,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:29,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2021-10-15 19:41:29,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 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) [2021-10-15 19:41:29,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,927 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,927 INFO L186 Difference]: Start difference. First operand has 113 places, 167 transitions, 350 flow. Second operand 3 states and 463 transitions. [2021-10-15 19:41:29,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 177 transitions, 568 flow [2021-10-15 19:41:29,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 177 transitions, 562 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:29,938 INFO L242 Difference]: Finished difference. Result has 115 places, 169 transitions, 376 flow [2021-10-15 19:41:29,939 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=115, PETRI_TRANSITIONS=169} [2021-10-15 19:41:29,939 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 6 predicate places. [2021-10-15 19:41:29,939 INFO L470 AbstractCegarLoop]: Abstraction has has 115 places, 169 transitions, 376 flow [2021-10-15 19:41:29,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:29,940 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:29,940 INFO L254 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:29,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-15 19:41:30,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:30,141 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:30,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:30,142 INFO L82 PathProgramCache]: Analyzing trace with hash 432494245, now seen corresponding path program 1 times [2021-10-15 19:41:30,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:30,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442167624] [2021-10-15 19:41:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:30,143 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:30,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:30,144 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:30,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-15 19:41:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:30,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:30,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:41:30,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:41:30,551 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:30,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442167624] [2021-10-15 19:41:30,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442167624] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:30,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:30,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 19:41:30,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75848408] [2021-10-15 19:41:30,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:30,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:30,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:30,558 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:30,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 169 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:30,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:30,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:30,559 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:30,757 INFO L129 PetriNetUnfolder]: 72/223 cut-off events. [2021-10-15 19:41:30,757 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-10-15 19:41:30,758 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 223 events. 72/223 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 258 event pairs, 0 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 278. Up to 99 conditions per place. [2021-10-15 19:41:30,760 INFO L132 encePairwiseOnDemand]: 201/213 looper letters, 98 selfloop transitions, 5 changer transitions 0/182 dead transitions. [2021-10-15 19:41:30,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 182 transitions, 612 flow [2021-10-15 19:41:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2021-10-15 19:41:30,764 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7323943661971831 [2021-10-15 19:41:30,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2021-10-15 19:41:30,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2021-10-15 19:41:30,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:30,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2021-10-15 19:41:30,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:30,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:30,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:30,770 INFO L186 Difference]: Start difference. First operand has 115 places, 169 transitions, 376 flow. Second operand 3 states and 468 transitions. [2021-10-15 19:41:30,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 182 transitions, 612 flow [2021-10-15 19:41:30,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 182 transitions, 606 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:30,779 INFO L242 Difference]: Finished difference. Result has 117 places, 172 transitions, 418 flow [2021-10-15 19:41:30,780 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=117, PETRI_TRANSITIONS=172} [2021-10-15 19:41:30,780 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 8 predicate places. [2021-10-15 19:41:30,780 INFO L470 AbstractCegarLoop]: Abstraction has has 117 places, 172 transitions, 418 flow [2021-10-15 19:41:30,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:30,781 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:30,782 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:41:30,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:30,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:30,995 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:30,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:30,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1155533614, now seen corresponding path program 1 times [2021-10-15 19:41:30,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:30,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1605566676] [2021-10-15 19:41:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:30,997 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:30,998 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:31,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-15 19:41:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:31,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:41:31,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-15 19:41:31,494 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:31,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1605566676] [2021-10-15 19:41:31,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1605566676] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:31,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:31,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 19:41:31,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707222980] [2021-10-15 19:41:31,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:31,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:31,499 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 213 [2021-10-15 19:41:31,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 172 transitions, 418 flow. Second operand has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:31,501 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:31,501 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 213 [2021-10-15 19:41:31,501 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:31,554 INFO L129 PetriNetUnfolder]: 78/251 cut-off events. [2021-10-15 19:41:31,555 INFO L130 PetriNetUnfolder]: For 23/23 co-relation queries the response was YES. [2021-10-15 19:41:31,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 251 events. 78/251 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 339 event pairs, 0 based on Foata normal form. 0/181 useless extension candidates. Maximal degree in co-relation 171. Up to 20 conditions per place. [2021-10-15 19:41:31,562 INFO L132 encePairwiseOnDemand]: 210/213 looper letters, 12 selfloop transitions, 2 changer transitions 0/173 dead transitions. [2021-10-15 19:41:31,562 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 173 transitions, 448 flow [2021-10-15 19:41:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:31,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2021-10-15 19:41:31,565 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9483568075117371 [2021-10-15 19:41:31,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2021-10-15 19:41:31,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2021-10-15 19:41:31,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:31,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2021-10-15 19:41:31,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:31,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:31,573 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:31,573 INFO L186 Difference]: Start difference. First operand has 117 places, 172 transitions, 418 flow. Second operand 3 states and 606 transitions. [2021-10-15 19:41:31,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 173 transitions, 448 flow [2021-10-15 19:41:31,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 173 transitions, 438 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:31,581 INFO L242 Difference]: Finished difference. Result has 118 places, 173 transitions, 420 flow [2021-10-15 19:41:31,582 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=420, PETRI_PLACES=118, PETRI_TRANSITIONS=173} [2021-10-15 19:41:31,582 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 9 predicate places. [2021-10-15 19:41:31,582 INFO L470 AbstractCegarLoop]: Abstraction has has 118 places, 173 transitions, 420 flow [2021-10-15 19:41:31,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.33333333333334) internal successors, (595), 3 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:31,583 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:31,583 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:41:31,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:31,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:31,795 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:31,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1474543958, now seen corresponding path program 1 times [2021-10-15 19:41:31,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:31,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [562838022] [2021-10-15 19:41:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:31,797 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:31,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:31,798 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:31,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-15 19:41:31,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:31,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:31,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:41:32,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:41:32,332 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:32,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [562838022] [2021-10-15 19:41:32,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [562838022] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:32,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:32,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-15 19:41:32,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937158454] [2021-10-15 19:41:32,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:41:32,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:32,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:41:32,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:41:32,337 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:32,339 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 173 transitions, 420 flow. Second operand has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:32,339 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:32,339 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:32,339 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:32,622 INFO L129 PetriNetUnfolder]: 102/346 cut-off events. [2021-10-15 19:41:32,623 INFO L130 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2021-10-15 19:41:32,623 INFO L84 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 346 events. 102/346 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 713 event pairs, 0 based on Foata normal form. 7/267 useless extension candidates. Maximal degree in co-relation 438. Up to 134 conditions per place. [2021-10-15 19:41:32,626 INFO L132 encePairwiseOnDemand]: 174/213 looper letters, 136 selfloop transitions, 23 changer transitions 0/239 dead transitions. [2021-10-15 19:41:32,626 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 239 transitions, 912 flow [2021-10-15 19:41:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:41:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:41:32,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 664 transitions. [2021-10-15 19:41:32,629 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7793427230046949 [2021-10-15 19:41:32,629 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 664 transitions. [2021-10-15 19:41:32,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 664 transitions. [2021-10-15 19:41:32,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:32,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 664 transitions. [2021-10-15 19:41:32,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 166.0) internal successors, (664), 4 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:32,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:32,636 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:32,636 INFO L186 Difference]: Start difference. First operand has 118 places, 173 transitions, 420 flow. Second operand 4 states and 664 transitions. [2021-10-15 19:41:32,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 239 transitions, 912 flow [2021-10-15 19:41:32,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 239 transitions, 910 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:32,644 INFO L242 Difference]: Finished difference. Result has 123 places, 191 transitions, 674 flow [2021-10-15 19:41:32,645 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=674, PETRI_PLACES=123, PETRI_TRANSITIONS=191} [2021-10-15 19:41:32,645 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 14 predicate places. [2021-10-15 19:41:32,645 INFO L470 AbstractCegarLoop]: Abstraction has has 123 places, 191 transitions, 674 flow [2021-10-15 19:41:32,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:32,646 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:32,646 INFO L254 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2021-10-15 19:41:32,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:32,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:32,864 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1395137893, now seen corresponding path program 1 times [2021-10-15 19:41:32,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:32,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454155276] [2021-10-15 19:41:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:32,866 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:32,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:32,867 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:32,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-15 19:41:33,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:33,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:33,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:41:33,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-15 19:41:33,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:33,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454155276] [2021-10-15 19:41:33,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454155276] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:33,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:33,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 19:41:33,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827082304] [2021-10-15 19:41:33,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:33,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:33,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:33,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:33,420 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:33,421 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 191 transitions, 674 flow. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:33,421 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:33,421 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:33,421 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:33,586 INFO L129 PetriNetUnfolder]: 109/376 cut-off events. [2021-10-15 19:41:33,586 INFO L130 PetriNetUnfolder]: For 200/200 co-relation queries the response was YES. [2021-10-15 19:41:33,587 INFO L84 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 376 events. 109/376 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 693 event pairs, 0 based on Foata normal form. 10/324 useless extension candidates. Maximal degree in co-relation 568. Up to 189 conditions per place. [2021-10-15 19:41:33,590 INFO L132 encePairwiseOnDemand]: 200/213 looper letters, 120 selfloop transitions, 5 changer transitions 0/205 dead transitions. [2021-10-15 19:41:33,590 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 205 transitions, 962 flow [2021-10-15 19:41:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2021-10-15 19:41:33,593 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7370892018779343 [2021-10-15 19:41:33,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2021-10-15 19:41:33,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2021-10-15 19:41:33,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:33,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2021-10-15 19:41:33,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:33,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:33,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:33,599 INFO L186 Difference]: Start difference. First operand has 123 places, 191 transitions, 674 flow. Second operand 3 states and 471 transitions. [2021-10-15 19:41:33,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 205 transitions, 962 flow [2021-10-15 19:41:33,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 205 transitions, 962 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:41:33,608 INFO L242 Difference]: Finished difference. Result has 127 places, 193 transitions, 726 flow [2021-10-15 19:41:33,609 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=726, PETRI_PLACES=127, PETRI_TRANSITIONS=193} [2021-10-15 19:41:33,609 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 18 predicate places. [2021-10-15 19:41:33,609 INFO L470 AbstractCegarLoop]: Abstraction has has 127 places, 193 transitions, 726 flow [2021-10-15 19:41:33,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:33,610 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:33,610 INFO L254 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:33,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:33,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:33,822 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:33,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1637748145, now seen corresponding path program 1 times [2021-10-15 19:41:33,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:33,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173476629] [2021-10-15 19:41:33,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:33,827 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:33,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:33,828 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:33,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-15 19:41:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:34,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:34,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-15 19:41:34,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-10-15 19:41:34,421 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:34,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173476629] [2021-10-15 19:41:34,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173476629] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:34,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:34,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 19:41:34,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886399729] [2021-10-15 19:41:34,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:34,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:34,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:34,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:34,424 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:34,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 193 transitions, 726 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:34,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:34,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:34,608 INFO L129 PetriNetUnfolder]: 115/406 cut-off events. [2021-10-15 19:41:34,608 INFO L130 PetriNetUnfolder]: For 303/303 co-relation queries the response was YES. [2021-10-15 19:41:34,609 INFO L84 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 406 events. 115/406 cut-off events. For 303/303 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 678 event pairs, 0 based on Foata normal form. 12/350 useless extension candidates. Maximal degree in co-relation 644. Up to 203 conditions per place. [2021-10-15 19:41:34,612 INFO L132 encePairwiseOnDemand]: 198/213 looper letters, 124 selfloop transitions, 5 changer transitions 0/209 dead transitions. [2021-10-15 19:41:34,612 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 209 transitions, 1032 flow [2021-10-15 19:41:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:34,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:34,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2021-10-15 19:41:34,615 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.7433489827856025 [2021-10-15 19:41:34,615 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2021-10-15 19:41:34,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2021-10-15 19:41:34,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:34,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2021-10-15 19:41:34,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,619 INFO L186 Difference]: Start difference. First operand has 127 places, 193 transitions, 726 flow. Second operand 3 states and 475 transitions. [2021-10-15 19:41:34,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 209 transitions, 1032 flow [2021-10-15 19:41:34,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 209 transitions, 1018 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:34,629 INFO L242 Difference]: Finished difference. Result has 129 places, 195 transitions, 772 flow [2021-10-15 19:41:34,630 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=712, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=772, PETRI_PLACES=129, PETRI_TRANSITIONS=195} [2021-10-15 19:41:34,630 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 20 predicate places. [2021-10-15 19:41:34,631 INFO L470 AbstractCegarLoop]: Abstraction has has 129 places, 195 transitions, 772 flow [2021-10-15 19:41:34,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:34,631 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:34,631 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 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] [2021-10-15 19:41:34,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-15 19:41:34,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:34,844 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash -941059334, now seen corresponding path program 1 times [2021-10-15 19:41:34,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:34,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278267734] [2021-10-15 19:41:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:34,845 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:34,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:34,846 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:34,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-15 19:41:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:35,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:35,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:41:35,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-10-15 19:41:35,641 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:35,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278267734] [2021-10-15 19:41:35,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278267734] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:35,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:35,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-15 19:41:35,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397822116] [2021-10-15 19:41:35,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:41:35,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:35,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:41:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:41:35,646 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 213 [2021-10-15 19:41:35,647 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 195 transitions, 772 flow. Second operand has 4 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:35,647 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:35,647 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 213 [2021-10-15 19:41:35,648 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:35,774 INFO L129 PetriNetUnfolder]: 213/785 cut-off events. [2021-10-15 19:41:35,775 INFO L130 PetriNetUnfolder]: For 486/486 co-relation queries the response was YES. [2021-10-15 19:41:35,778 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1276 conditions, 785 events. 213/785 cut-off events. For 486/486 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2628 event pairs, 0 based on Foata normal form. 2/665 useless extension candidates. Maximal degree in co-relation 600. Up to 80 conditions per place. [2021-10-15 19:41:35,781 INFO L132 encePairwiseOnDemand]: 204/213 looper letters, 14 selfloop transitions, 7 changer transitions 0/202 dead transitions. [2021-10-15 19:41:35,782 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 202 transitions, 830 flow [2021-10-15 19:41:35,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:41:35,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:41:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 815 transitions. [2021-10-15 19:41:35,785 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9565727699530516 [2021-10-15 19:41:35,785 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 815 transitions. [2021-10-15 19:41:35,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 815 transitions. [2021-10-15 19:41:35,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:35,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 815 transitions. [2021-10-15 19:41:35,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.75) internal successors, (815), 4 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:35,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:35,791 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:35,792 INFO L186 Difference]: Start difference. First operand has 129 places, 195 transitions, 772 flow. Second operand 4 states and 815 transitions. [2021-10-15 19:41:35,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 202 transitions, 830 flow [2021-10-15 19:41:35,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 202 transitions, 816 flow, removed 2 selfloop flow, removed 2 redundant places. [2021-10-15 19:41:35,801 INFO L242 Difference]: Finished difference. Result has 132 places, 197 transitions, 794 flow [2021-10-15 19:41:35,802 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=794, PETRI_PLACES=132, PETRI_TRANSITIONS=197} [2021-10-15 19:41:35,802 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 23 predicate places. [2021-10-15 19:41:35,802 INFO L470 AbstractCegarLoop]: Abstraction has has 132 places, 197 transitions, 794 flow [2021-10-15 19:41:35,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 198.75) internal successors, (795), 4 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:35,803 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:35,803 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:35,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:36,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:36,017 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:36,017 INFO L82 PathProgramCache]: Analyzing trace with hash 592587097, now seen corresponding path program 1 times [2021-10-15 19:41:36,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:36,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429727754] [2021-10-15 19:41:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:36,018 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:36,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:36,020 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:36,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-15 19:41:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:36,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:36,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-15 19:41:36,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-15 19:41:36,877 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:36,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429727754] [2021-10-15 19:41:36,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429727754] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:36,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:36,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 19:41:36,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398313095] [2021-10-15 19:41:36,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:36,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:36,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:36,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:36,880 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 213 [2021-10-15 19:41:36,881 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 197 transitions, 794 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:36,881 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:36,881 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 213 [2021-10-15 19:41:36,881 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:36,992 INFO L129 PetriNetUnfolder]: 220/818 cut-off events. [2021-10-15 19:41:36,992 INFO L130 PetriNetUnfolder]: For 494/494 co-relation queries the response was YES. [2021-10-15 19:41:36,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1326 conditions, 818 events. 220/818 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3013 event pairs, 0 based on Foata normal form. 1/698 useless extension candidates. Maximal degree in co-relation 1081. Up to 85 conditions per place. [2021-10-15 19:41:36,997 INFO L132 encePairwiseOnDemand]: 210/213 looper letters, 15 selfloop transitions, 2 changer transitions 0/198 dead transitions. [2021-10-15 19:41:36,997 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 198 transitions, 834 flow [2021-10-15 19:41:36,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:36,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2021-10-15 19:41:37,000 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9483568075117371 [2021-10-15 19:41:37,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2021-10-15 19:41:37,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2021-10-15 19:41:37,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:37,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2021-10-15 19:41:37,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:37,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:37,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:37,006 INFO L186 Difference]: Start difference. First operand has 132 places, 197 transitions, 794 flow. Second operand 3 states and 606 transitions. [2021-10-15 19:41:37,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 198 transitions, 834 flow [2021-10-15 19:41:37,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 198 transitions, 834 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:41:37,015 INFO L242 Difference]: Finished difference. Result has 135 places, 198 transitions, 810 flow [2021-10-15 19:41:37,016 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=810, PETRI_PLACES=135, PETRI_TRANSITIONS=198} [2021-10-15 19:41:37,016 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 26 predicate places. [2021-10-15 19:41:37,016 INFO L470 AbstractCegarLoop]: Abstraction has has 135 places, 198 transitions, 810 flow [2021-10-15 19:41:37,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:37,020 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:37,020 INFO L254 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:37,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-15 19:41:37,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:37,233 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash -26254268, now seen corresponding path program 1 times [2021-10-15 19:41:37,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:37,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1384547141] [2021-10-15 19:41:37,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:37,234 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:37,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:37,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:37,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-15 19:41:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:37,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-15 19:41:37,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:38,054 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-10-15 19:41:38,054 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:38,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1384547141] [2021-10-15 19:41:38,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1384547141] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:38,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:38,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-15 19:41:38,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468434342] [2021-10-15 19:41:38,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:41:38,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:41:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:41:38,061 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 213 [2021-10-15 19:41:38,062 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 198 transitions, 810 flow. Second operand has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:38,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:38,063 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 213 [2021-10-15 19:41:38,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:38,294 INFO L129 PetriNetUnfolder]: 410/1498 cut-off events. [2021-10-15 19:41:38,294 INFO L130 PetriNetUnfolder]: For 1023/1023 co-relation queries the response was YES. [2021-10-15 19:41:38,298 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2465 conditions, 1498 events. 410/1498 cut-off events. For 1023/1023 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 6491 event pairs, 0 based on Foata normal form. 12/1297 useless extension candidates. Maximal degree in co-relation 2386. Up to 150 conditions per place. [2021-10-15 19:41:38,304 INFO L132 encePairwiseOnDemand]: 204/213 looper letters, 25 selfloop transitions, 8 changer transitions 0/214 dead transitions. [2021-10-15 19:41:38,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 214 transitions, 942 flow [2021-10-15 19:41:38,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:41:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:41:38,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 823 transitions. [2021-10-15 19:41:38,308 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.965962441314554 [2021-10-15 19:41:38,309 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 823 transitions. [2021-10-15 19:41:38,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 823 transitions. [2021-10-15 19:41:38,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:38,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 823 transitions. [2021-10-15 19:41:38,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 205.75) internal successors, (823), 4 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:38,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:38,318 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:38,318 INFO L186 Difference]: Start difference. First operand has 135 places, 198 transitions, 810 flow. Second operand 4 states and 823 transitions. [2021-10-15 19:41:38,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 214 transitions, 942 flow [2021-10-15 19:41:38,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 214 transitions, 938 flow, removed 1 selfloop flow, removed 1 redundant places. [2021-10-15 19:41:38,333 INFO L242 Difference]: Finished difference. Result has 140 places, 204 transitions, 890 flow [2021-10-15 19:41:38,334 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=890, PETRI_PLACES=140, PETRI_TRANSITIONS=204} [2021-10-15 19:41:38,334 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 31 predicate places. [2021-10-15 19:41:38,335 INFO L470 AbstractCegarLoop]: Abstraction has has 140 places, 204 transitions, 890 flow [2021-10-15 19:41:38,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:38,335 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:38,336 INFO L254 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:38,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:38,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:38,549 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:38,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2111720797, now seen corresponding path program 1 times [2021-10-15 19:41:38,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:38,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828671195] [2021-10-15 19:41:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:38,552 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:38,553 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:38,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-15 19:41:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:38,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:39,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-10-15 19:41:39,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-10-15 19:41:39,757 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:39,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828671195] [2021-10-15 19:41:39,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828671195] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:39,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:39,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-15 19:41:39,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039131061] [2021-10-15 19:41:39,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 19:41:39,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:39,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 19:41:39,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 19:41:39,760 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 213 [2021-10-15 19:41:39,761 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 204 transitions, 890 flow. Second operand has 4 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:39,761 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:39,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 213 [2021-10-15 19:41:39,761 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:40,189 INFO L129 PetriNetUnfolder]: 426/1606 cut-off events. [2021-10-15 19:41:40,189 INFO L130 PetriNetUnfolder]: For 1382/1382 co-relation queries the response was YES. [2021-10-15 19:41:40,193 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3477 conditions, 1606 events. 426/1606 cut-off events. For 1382/1382 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6349 event pairs, 0 based on Foata normal form. 60/1438 useless extension candidates. Maximal degree in co-relation 2391. Up to 737 conditions per place. [2021-10-15 19:41:40,200 INFO L132 encePairwiseOnDemand]: 191/213 looper letters, 125 selfloop transitions, 15 changer transitions 0/229 dead transitions. [2021-10-15 19:41:40,201 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 229 transitions, 1226 flow [2021-10-15 19:41:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 19:41:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-10-15 19:41:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 615 transitions. [2021-10-15 19:41:40,204 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.721830985915493 [2021-10-15 19:41:40,204 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 615 transitions. [2021-10-15 19:41:40,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 615 transitions. [2021-10-15 19:41:40,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:40,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 615 transitions. [2021-10-15 19:41:40,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.75) internal successors, (615), 4 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:40,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:40,209 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 213.0) internal successors, (1065), 5 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:40,209 INFO L186 Difference]: Start difference. First operand has 140 places, 204 transitions, 890 flow. Second operand 4 states and 615 transitions. [2021-10-15 19:41:40,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 229 transitions, 1226 flow [2021-10-15 19:41:40,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 229 transitions, 1226 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-10-15 19:41:40,221 INFO L242 Difference]: Finished difference. Result has 146 places, 205 transitions, 968 flow [2021-10-15 19:41:40,222 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=968, PETRI_PLACES=146, PETRI_TRANSITIONS=205} [2021-10-15 19:41:40,222 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 37 predicate places. [2021-10-15 19:41:40,222 INFO L470 AbstractCegarLoop]: Abstraction has has 146 places, 205 transitions, 968 flow [2021-10-15 19:41:40,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:40,223 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:40,223 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:40,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:40,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:40,436 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:40,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1483315329, now seen corresponding path program 1 times [2021-10-15 19:41:40,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:40,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504486168] [2021-10-15 19:41:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:40,438 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:40,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:40,439 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:40,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-15 19:41:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 19:41:40,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 19:41:40,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 19:41:41,410 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-15 19:41:41,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 19:41:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 597 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-10-15 19:41:41,933 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 19:41:41,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504486168] [2021-10-15 19:41:41,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504486168] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 19:41:41,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 19:41:41,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 19:41:41,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330318563] [2021-10-15 19:41:41,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 19:41:41,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 19:41:41,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 19:41:41,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 19:41:41,937 INFO L499 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 213 [2021-10-15 19:41:41,938 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 205 transitions, 968 flow. Second operand has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:41,938 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-10-15 19:41:41,938 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 213 [2021-10-15 19:41:41,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-10-15 19:41:42,212 INFO L129 PetriNetUnfolder]: 517/1970 cut-off events. [2021-10-15 19:41:42,213 INFO L130 PetriNetUnfolder]: For 1794/1794 co-relation queries the response was YES. [2021-10-15 19:41:42,219 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3378 conditions, 1970 events. 517/1970 cut-off events. For 1794/1794 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 8615 event pairs, 0 based on Foata normal form. 0/1691 useless extension candidates. Maximal degree in co-relation 2416. Up to 210 conditions per place. [2021-10-15 19:41:42,227 INFO L132 encePairwiseOnDemand]: 211/213 looper letters, 5 selfloop transitions, 1 changer transitions 0/207 dead transitions. [2021-10-15 19:41:42,227 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 207 transitions, 984 flow [2021-10-15 19:41:42,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 19:41:42,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-10-15 19:41:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2021-10-15 19:41:42,230 INFO L544 CegarLoopForPetriNet]: DFA transition density 0.9780907668231612 [2021-10-15 19:41:42,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2021-10-15 19:41:42,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2021-10-15 19:41:42,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-15 19:41:42,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2021-10-15 19:41:42,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:42,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:42,236 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 213.0) internal successors, (852), 4 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:42,237 INFO L186 Difference]: Start difference. First operand has 146 places, 205 transitions, 968 flow. Second operand 3 states and 625 transitions. [2021-10-15 19:41:42,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 207 transitions, 984 flow [2021-10-15 19:41:42,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 207 transitions, 982 flow, removed 1 selfloop flow, removed 0 redundant places. [2021-10-15 19:41:42,252 INFO L242 Difference]: Finished difference. Result has 150 places, 206 transitions, 976 flow [2021-10-15 19:41:42,252 INFO L317 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=976, PETRI_PLACES=150, PETRI_TRANSITIONS=206} [2021-10-15 19:41:42,252 INFO L334 CegarLoopForPetriNet]: 109 programPoint places, 41 predicate places. [2021-10-15 19:41:42,253 INFO L470 AbstractCegarLoop]: Abstraction has has 150 places, 206 transitions, 976 flow [2021-10-15 19:41:42,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-15 19:41:42,253 INFO L246 CegarLoopForPetriNet]: Found error trace [2021-10-15 19:41:42,254 INFO L254 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 19:41:42,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:42,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:42,467 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-15 19:41:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 19:41:42,467 INFO L82 PathProgramCache]: Analyzing trace with hash -319918519, now seen corresponding path program 1 times [2021-10-15 19:41:42,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 19:41:42,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597977093] [2021-10-15 19:41:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 19:41:42,468 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 19:41:42,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 19:41:42,470 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 19:41:42,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-15 19:41:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:41:43,121 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 19:41:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 19:41:43,495 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-15 19:41:43,495 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 19:41:43,496 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-15 19:41:43,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-15 19:41:43,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 19:41:43,703 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 19:41:43,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 07:41:43 BoogieIcfgContainer [2021-10-15 19:41:43,896 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 19:41:43,897 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 19:41:43,897 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 19:41:43,897 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 19:41:43,898 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 07:41:28" (3/4) ... [2021-10-15 19:41:43,900 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-15 19:41:44,058 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/witness.graphml [2021-10-15 19:41:44,058 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 19:41:44,060 INFO L168 Benchmark]: Toolchain (without parser) took 17348.38 ms. Allocated memory was 60.8 MB in the beginning and 144.7 MB in the end (delta: 83.9 MB). Free memory was 40.7 MB in the beginning and 73.1 MB in the end (delta: -32.5 MB). Peak memory consumption was 52.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:44,060 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 60.8 MB. Free memory is still 41.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 19:41:44,061 INFO L168 Benchmark]: CACSL2BoogieTranslator took 549.28 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 41.3 MB in the end (delta: -830.8 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:44,061 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.70 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 38.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:44,062 INFO L168 Benchmark]: Boogie Preprocessor took 41.41 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 36.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:44,062 INFO L168 Benchmark]: RCFGBuilder took 751.26 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 36.6 MB in the beginning and 54.9 MB in the end (delta: -18.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:44,063 INFO L168 Benchmark]: TraceAbstraction took 15749.18 ms. Allocated memory was 81.8 MB in the beginning and 144.7 MB in the end (delta: 62.9 MB). Free memory was 54.2 MB in the beginning and 95.2 MB in the end (delta: -41.0 MB). Peak memory consumption was 86.0 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:44,063 INFO L168 Benchmark]: Witness Printer took 161.38 ms. Allocated memory is still 144.7 MB. Free memory was 95.2 MB in the beginning and 73.1 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-15 19:41:44,068 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 60.8 MB. Free memory is still 41.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 549.28 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 41.3 MB in the end (delta: -830.8 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 87.70 ms. Allocated memory is still 60.8 MB. Free memory was 41.3 MB in the beginning and 38.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.41 ms. Allocated memory is still 60.8 MB. Free memory was 38.7 MB in the beginning and 36.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 751.26 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 36.6 MB in the beginning and 54.9 MB in the end (delta: -18.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15749.18 ms. Allocated memory was 81.8 MB in the beginning and 144.7 MB in the end (delta: 62.9 MB). Free memory was 54.2 MB in the beginning and 95.2 MB in the end (delta: -41.0 MB). Peak memory consumption was 86.0 MB. Max. memory is 16.1 GB. * Witness Printer took 161.38 ms. Allocated memory is still 144.7 MB. Free memory was 95.2 MB in the beginning and 73.1 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 609]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L618] int __retres1 ; [L11] int s__info_callback = __VERIFIER_nondet_int(); [L12] unsigned int s__in_handshake = __VERIFIER_nondet_uint(); [L13] int s__state ; [L14] int s__new_session ; [L15] int s__server ; [L16] unsigned int s__version = __VERIFIER_nondet_uint(); [L17] int s__type ; [L18] int s__init_num ; [L19] int s__bbio = __VERIFIER_nondet_int(); [L20] int s__wbio = __VERIFIER_nondet_int(); [L21] int s__hit = __VERIFIER_nondet_int(); [L22] int s__rwstate ; [L23] int s__init_buf___0 = __VERIFIER_nondet_int(); [L24] int s__debug = __VERIFIER_nondet_int(); [L25] int s__shutdown ; [L26] int s__ctx__info_callback = __VERIFIER_nondet_int(); [L27] unsigned int s__ctx__stats__sess_connect_renegotiate = __VERIFIER_nondet_uint(); [L28] unsigned int s__ctx__stats__sess_connect = __VERIFIER_nondet_uint(); [L29] unsigned int s__ctx__stats__sess_hit = __VERIFIER_nondet_uint(); [L30] unsigned int s__ctx__stats__sess_connect_good = __VERIFIER_nondet_uint(); [L31] int s__s3__change_cipher_spec ; [L32] int s__s3__flags = __VERIFIER_nondet_int(); [L33] int s__s3__delay_buf_pop_ret ; [L34] int s__s3__tmp__cert_req = __VERIFIER_nondet_int(); [L35] int s__s3__tmp__new_compression = __VERIFIER_nondet_int(); [L36] int s__s3__tmp__reuse_message = __VERIFIER_nondet_int(); [L37] int s__s3__tmp__new_cipher = __VERIFIER_nondet_int(); [L38] int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int(); [L39] int s__s3__tmp__next_state___0 ; [L40] int s__s3__tmp__new_compression__id = __VERIFIER_nondet_int(); [L41] int s__session__cipher ; [L42] int s__session__compress_meth ; [L43] int buf ; [L44] unsigned long tmp ; [L45] unsigned long l ; [L46] int num1 = __VERIFIER_nondet_int(); [L47] int cb ; [L48] int ret ; [L49] int new_state ; [L50] int state ; [L51] int skip ; [L52] int tmp___0 ; [L53] unsigned int tmp___1 = __VERIFIER_nondet_uint(); [L54] unsigned int tmp___2 = __VERIFIER_nondet_uint(); [L55] int tmp___3 = __VERIFIER_nondet_int(); [L56] int tmp___4 = __VERIFIER_nondet_int(); [L57] int tmp___5 = __VERIFIER_nondet_int(); [L58] int tmp___6 = __VERIFIER_nondet_int(); [L59] int tmp___7 = __VERIFIER_nondet_int(); [L60] int tmp___8 = __VERIFIER_nondet_int(); [L61] int tmp___9 = __VERIFIER_nondet_int(); [L62] int blastFlag ; [L63] int ag_X ; [L64] int ag_Y = __VERIFIER_nondet_int(); [L65] int __retres59 ; [L68] s__state = 12292 [L69] blastFlag = 0 [L70] tmp = __VERIFIER_nondet_int() [L71] cb = 0 [L72] ret = -1 [L73] skip = 0 [L74] tmp___0 = 0 [L75] COND TRUE s__info_callback != 0 [L76] cb = s__info_callback [L84] s__in_handshake = s__in_handshake + 1 [L85] COND FALSE !(tmp___1 - 12288) [L95] COND TRUE 1 [L97] state = s__state [L98] COND TRUE s__state == 12292 [L201] s__new_session = 1 [L202] s__state = 4096 [L203] s__ctx__stats__sess_connect_renegotiate = s__ctx__stats__sess_connect_renegotiate + 1 [L208] s__server = 0 [L209] COND TRUE cb != 0 [L214] COND FALSE !(s__version - 65280 != 768) [L220] s__type = 4096 [L221] COND FALSE !(s__init_buf___0 == 0) [L239] COND FALSE !(! tmp___4) [L245] COND FALSE !(! tmp___5) [L251] s__state = 4368 [L252] s__ctx__stats__sess_connect = s__ctx__stats__sess_connect + 1 [L253] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND TRUE blastFlag == 0 [L260] blastFlag = 1 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND FALSE !(s__bbio != s__wbio) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND TRUE blastFlag == 1 [L285] blastFlag = 2 [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND TRUE blastFlag == 2 [L308] blastFlag = 3 [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND TRUE blastFlag == 3 [L325] blastFlag = 4 [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND FALSE !(blastFlag == 5) [L352] COND FALSE !(ret <= 0) [L357] s__state = ag_X ^ ag_Y [L358] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND TRUE s__state == 4368 [L257] s__shutdown = 0 [L258] ret = __VERIFIER_nondet_int() [L259] COND FALSE !(blastFlag == 0) [L262] COND TRUE blastFlag == 4 [L263] blastFlag = 5 [L268] COND FALSE !(ret <= 0) [L273] s__state = 4384 [L274] s__init_num = 0 [L275] COND FALSE !(s__bbio != s__wbio) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND TRUE s__state == 4384 [L283] ret = __VERIFIER_nondet_int() [L284] COND FALSE !(blastFlag == 1) [L289] COND FALSE !(ret <= 0) [L294] COND FALSE !(\read(s__hit)) [L297] s__state = 4400 [L299] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND TRUE s__state == 4400 [L303] COND FALSE !((unsigned long )s__s3__tmp__new_cipher__algorithms - 256UL) [L306] ret = __VERIFIER_nondet_int() [L307] COND FALSE !(blastFlag == 2) [L312] COND FALSE !(ret <= 0) [L318] s__state = 4416 [L319] s__init_num = 0 [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND TRUE s__state == 4416 [L323] ret = __VERIFIER_nondet_int() [L324] COND FALSE !(blastFlag == 3) [L329] COND FALSE !(ret <= 0) [L334] s__state = 4432 [L335] ag_X = (unsigned short)65535 [L336] s__init_num = 0 [L337] COND FALSE !(! tmp___6) [L567] COND FALSE !(! s__s3__tmp__reuse_message) [L596] skip = 0 [L95] COND TRUE 1 [L97] state = s__state [L98] COND FALSE !(s__state == 12292) [L101] COND FALSE !(s__state == 16384) [L104] COND FALSE !(s__state == 4096) [L107] COND FALSE !(s__state == 20480) [L110] COND FALSE !(s__state == 4099) [L113] COND FALSE !(s__state == 4368) [L116] COND FALSE !(s__state == 4369) [L119] COND FALSE !(s__state == 4384) [L122] COND FALSE !(s__state == 4385) [L125] COND FALSE !(s__state == 4400) [L128] COND FALSE !(s__state == 4401) [L131] COND FALSE !(s__state == 4416) [L134] COND FALSE !(s__state == 4417) [L137] COND TRUE s__state == 4432 [L346] ret = __VERIFIER_nondet_int() [L347] COND TRUE blastFlag == 5 [L609] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 125 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 19.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 15468.0ms, OverallIterations: 13, TraceHistogramMax: 11, EmptinessCheckTime: 0.0ms, AutomataDifference: 2872.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 121.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 504 SDtfs, 167 SDslu, 0 SDs, 0 SdLazy, 952 SolverSat, 167 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 879.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2126 GetRequests, 2110 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=976occurred in iteration=12, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 225.8ms SsaConstructionTime, 679.7ms SatisfiabilityAnalysisTime, 5463.0ms InterpolantComputationTime, 1271 NumberOfCodeBlocks, 1271 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 2126 ConstructedInterpolants, 0 QuantifiedInterpolants, 3339 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1948 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 24 InterpolantComputations, 24 PerfectInterpolantSequences, 3388/3388 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-15 19:41:44,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1286921c-80f4-4997-8bed-63b6467da29e/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...