./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/locks/test_locks_7.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/locks/test_locks_7.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg --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 05c715fd95d2209519e9aa0425ca71b72050ac0ff5d332c8a9deb8ead8471230 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:18:05,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:18:05,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:18:05,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:18:05,479 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:18:05,483 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:18:05,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:18:05,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:18:05,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:18:05,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:18:05,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:18:05,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:18:05,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:18:05,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:18:05,507 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:18:05,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:18:05,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:18:05,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:18:05,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:18:05,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:18:05,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:18:05,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:18:05,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:18:05,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:18:05,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:18:05,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:18:05,548 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:18:05,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:18:05,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:18:05,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:18:05,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:18:05,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:18:05,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:18:05,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:18:05,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:18:05,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:18:05,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:18:05,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:18:05,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:18:05,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:18:05,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:18:05,563 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:18:05,610 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:18:05,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:18:05,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:18:05,611 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:18:05,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:18:05,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:18:05,614 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:18:05,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:18:05,614 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:18:05,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:18:05,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:18:05,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:18:05,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:18:05,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:18:05,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:18:05,617 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:18:05,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:18:05,617 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:18:05,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:18:05,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:18:05,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:18:05,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:18:05,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:18:05,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:18:05,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:18:05,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:18:05,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:18:05,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:18:05,620 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:18:05,622 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:18:05,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:18:05,623 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:18:05,623 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_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05c715fd95d2209519e9aa0425ca71b72050ac0ff5d332c8a9deb8ead8471230 [2021-10-28 09:18:05,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:18:05,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:18:05,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:18:05,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:18:05,920 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:18:05,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/locks/test_locks_7.c [2021-10-28 09:18:06,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/data/31f2a939f/4296172db71046be9de3302558044731/FLAGcc40e3baa [2021-10-28 09:18:06,429 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:18:06,430 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/sv-benchmarks/c/locks/test_locks_7.c [2021-10-28 09:18:06,439 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/data/31f2a939f/4296172db71046be9de3302558044731/FLAGcc40e3baa [2021-10-28 09:18:06,453 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/data/31f2a939f/4296172db71046be9de3302558044731 [2021-10-28 09:18:06,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:18:06,457 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:18:06,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:18:06,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:18:06,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:18:06,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d634809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06, skipping insertion in model container [2021-10-28 09:18:06,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,472 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:18:06,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:18:06,673 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_e57a95c3-b2eb-4ba8-8695-8e883b29f543/sv-benchmarks/c/locks/test_locks_7.c[2881,2894] [2021-10-28 09:18:06,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:18:06,689 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:18:06,731 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_e57a95c3-b2eb-4ba8-8695-8e883b29f543/sv-benchmarks/c/locks/test_locks_7.c[2881,2894] [2021-10-28 09:18:06,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:18:06,748 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:18:06,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06 WrapperNode [2021-10-28 09:18:06,749 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:18:06,750 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:18:06,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:18:06,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:18:06,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,765 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:18:06,787 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:18:06,787 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:18:06,787 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:18:06,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,807 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:18:06,811 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:18:06,811 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:18:06,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:18:06,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (1/1) ... [2021-10-28 09:18:06,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:18:06,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:06,866 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:06,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:18:06,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:18:06,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:18:06,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:18:06,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:18:07,218 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:18:07,219 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-28 09:18:07,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:18:07 BoogieIcfgContainer [2021-10-28 09:18:07,221 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:18:07,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:18:07,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:18:07,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:18:07,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:18:06" (1/3) ... [2021-10-28 09:18:07,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ea14c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:18:07, skipping insertion in model container [2021-10-28 09:18:07,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:06" (2/3) ... [2021-10-28 09:18:07,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ea14c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:18:07, skipping insertion in model container [2021-10-28 09:18:07,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:18:07" (3/3) ... [2021-10-28 09:18:07,228 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2021-10-28 09:18:07,233 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:18:07,234 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:18:07,278 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:18:07,285 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:18:07,285 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:18:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:18:07,318 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:07,319 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:07,319 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:07,325 INFO L85 PathProgramCache]: Analyzing trace with hash -882170869, now seen corresponding path program 1 times [2021-10-28 09:18:07,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:07,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42405732] [2021-10-28 09:18:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:07,335 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:07,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:07,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:07,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42405732] [2021-10-28 09:18:07,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42405732] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:07,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:07,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:07,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705119538] [2021-10-28 09:18:07,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:07,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:07,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:07,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:07,594 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:07,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:07,648 INFO L93 Difference]: Finished difference Result 65 states and 109 transitions. [2021-10-28 09:18:07,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:07,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 09:18:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:07,659 INFO L225 Difference]: With dead ends: 65 [2021-10-28 09:18:07,659 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:18:07,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:18:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2021-10-28 09:18:07,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 34 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:07,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 62 transitions. [2021-10-28 09:18:07,695 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 62 transitions. Word has length 14 [2021-10-28 09:18:07,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:07,696 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 62 transitions. [2021-10-28 09:18:07,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:07,697 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 62 transitions. [2021-10-28 09:18:07,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 09:18:07,698 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:07,698 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:07,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:18:07,699 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:07,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:07,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1275197879, now seen corresponding path program 1 times [2021-10-28 09:18:07,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:07,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084955581] [2021-10-28 09:18:07,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:07,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:07,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:07,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084955581] [2021-10-28 09:18:07,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084955581] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:07,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:07,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:07,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105539365] [2021-10-28 09:18:07,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:07,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:07,798 INFO L87 Difference]: Start difference. First operand 35 states and 62 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:07,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:07,830 INFO L93 Difference]: Finished difference Result 84 states and 149 transitions. [2021-10-28 09:18:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-28 09:18:07,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:07,836 INFO L225 Difference]: With dead ends: 84 [2021-10-28 09:18:07,837 INFO L226 Difference]: Without dead ends: 51 [2021-10-28 09:18:07,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:07,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-28 09:18:07,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-10-28 09:18:07,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 86 transitions. [2021-10-28 09:18:07,855 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 86 transitions. Word has length 14 [2021-10-28 09:18:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:07,856 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 86 transitions. [2021-10-28 09:18:07,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 86 transitions. [2021-10-28 09:18:07,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:18:07,858 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:07,858 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:07,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:18:07,860 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:07,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1577278843, now seen corresponding path program 1 times [2021-10-28 09:18:07,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:07,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882403046] [2021-10-28 09:18:07,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:07,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:07,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:07,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:07,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882403046] [2021-10-28 09:18:07,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882403046] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:07,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:07,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:07,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3611230] [2021-10-28 09:18:07,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:07,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:07,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:07,985 INFO L87 Difference]: Start difference. First operand 49 states and 86 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,015 INFO L93 Difference]: Finished difference Result 78 states and 132 transitions. [2021-10-28 09:18:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-28 09:18:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,017 INFO L225 Difference]: With dead ends: 78 [2021-10-28 09:18:08,018 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 09:18:08,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 09:18:08,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-10-28 09:18:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 88 transitions. [2021-10-28 09:18:08,029 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 88 transitions. Word has length 15 [2021-10-28 09:18:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,030 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 88 transitions. [2021-10-28 09:18:08,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 88 transitions. [2021-10-28 09:18:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:18:08,032 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,032 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:18:08,033 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,035 INFO L85 PathProgramCache]: Analyzing trace with hash -876214265, now seen corresponding path program 1 times [2021-10-28 09:18:08,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489376193] [2021-10-28 09:18:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489376193] [2021-10-28 09:18:08,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489376193] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943817398] [2021-10-28 09:18:08,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,120 INFO L87 Difference]: Start difference. First operand 52 states and 88 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,134 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2021-10-28 09:18:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-28 09:18:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,136 INFO L225 Difference]: With dead ends: 97 [2021-10-28 09:18:08,136 INFO L226 Difference]: Without dead ends: 95 [2021-10-28 09:18:08,137 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-28 09:18:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2021-10-28 09:18:08,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.7205882352941178) internal successors, (117), 68 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2021-10-28 09:18:08,146 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 15 [2021-10-28 09:18:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,146 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2021-10-28 09:18:08,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2021-10-28 09:18:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:18:08,147 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,148 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:18:08,148 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1269241275, now seen corresponding path program 1 times [2021-10-28 09:18:08,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79250275] [2021-10-28 09:18:08,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79250275] [2021-10-28 09:18:08,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79250275] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030857984] [2021-10-28 09:18:08,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,203 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,219 INFO L93 Difference]: Finished difference Result 161 states and 275 transitions. [2021-10-28 09:18:08,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-28 09:18:08,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,221 INFO L225 Difference]: With dead ends: 161 [2021-10-28 09:18:08,221 INFO L226 Difference]: Without dead ends: 97 [2021-10-28 09:18:08,222 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-28 09:18:08,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-10-28 09:18:08,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.6914893617021276) internal successors, (159), 94 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2021-10-28 09:18:08,231 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 15 [2021-10-28 09:18:08,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,232 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2021-10-28 09:18:08,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,232 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2021-10-28 09:18:08,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:18:08,233 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:18:08,234 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1392623778, now seen corresponding path program 1 times [2021-10-28 09:18:08,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214024424] [2021-10-28 09:18:08,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214024424] [2021-10-28 09:18:08,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214024424] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332826474] [2021-10-28 09:18:08,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,272 INFO L87 Difference]: Start difference. First operand 95 states and 159 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,286 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2021-10-28 09:18:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-28 09:18:08,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,287 INFO L225 Difference]: With dead ends: 144 [2021-10-28 09:18:08,288 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 09:18:08,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 09:18:08,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-10-28 09:18:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.65625) internal successors, (159), 96 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 159 transitions. [2021-10-28 09:18:08,297 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 159 transitions. Word has length 16 [2021-10-28 09:18:08,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,298 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 159 transitions. [2021-10-28 09:18:08,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 159 transitions. [2021-10-28 09:18:08,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:18:08,299 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,299 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:18:08,300 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,300 INFO L85 PathProgramCache]: Analyzing trace with hash -691559200, now seen corresponding path program 1 times [2021-10-28 09:18:08,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576890400] [2021-10-28 09:18:08,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576890400] [2021-10-28 09:18:08,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576890400] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606929337] [2021-10-28 09:18:08,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,352 INFO L87 Difference]: Start difference. First operand 97 states and 159 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,376 INFO L93 Difference]: Finished difference Result 273 states and 449 transitions. [2021-10-28 09:18:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-28 09:18:08,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,378 INFO L225 Difference]: With dead ends: 273 [2021-10-28 09:18:08,378 INFO L226 Difference]: Without dead ends: 183 [2021-10-28 09:18:08,379 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-10-28 09:18:08,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2021-10-28 09:18:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.6166666666666667) internal successors, (291), 180 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 291 transitions. [2021-10-28 09:18:08,394 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 291 transitions. Word has length 16 [2021-10-28 09:18:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,394 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 291 transitions. [2021-10-28 09:18:08,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 291 transitions. [2021-10-28 09:18:08,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 09:18:08,396 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,396 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:18:08,396 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash -298532190, now seen corresponding path program 1 times [2021-10-28 09:18:08,397 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993396629] [2021-10-28 09:18:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993396629] [2021-10-28 09:18:08,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993396629] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012713770] [2021-10-28 09:18:08,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,434 INFO L87 Difference]: Start difference. First operand 181 states and 291 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,457 INFO L93 Difference]: Finished difference Result 225 states and 365 transitions. [2021-10-28 09:18:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-28 09:18:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,460 INFO L225 Difference]: With dead ends: 225 [2021-10-28 09:18:08,461 INFO L226 Difference]: Without dead ends: 223 [2021-10-28 09:18:08,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-10-28 09:18:08,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2021-10-28 09:18:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.5944444444444446) internal successors, (287), 180 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 287 transitions. [2021-10-28 09:18:08,484 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 287 transitions. Word has length 16 [2021-10-28 09:18:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,484 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 287 transitions. [2021-10-28 09:18:08,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 287 transitions. [2021-10-28 09:18:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:18:08,490 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,491 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:18:08,491 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash 36716282, now seen corresponding path program 1 times [2021-10-28 09:18:08,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942234795] [2021-10-28 09:18:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942234795] [2021-10-28 09:18:08,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942234795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614799171] [2021-10-28 09:18:08,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,553 INFO L87 Difference]: Start difference. First operand 181 states and 287 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,582 INFO L93 Difference]: Finished difference Result 325 states and 521 transitions. [2021-10-28 09:18:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-28 09:18:08,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,585 INFO L225 Difference]: With dead ends: 325 [2021-10-28 09:18:08,586 INFO L226 Difference]: Without dead ends: 323 [2021-10-28 09:18:08,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-28 09:18:08,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 257. [2021-10-28 09:18:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.55859375) internal successors, (399), 256 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 399 transitions. [2021-10-28 09:18:08,603 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 399 transitions. Word has length 17 [2021-10-28 09:18:08,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,603 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 399 transitions. [2021-10-28 09:18:08,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,603 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 399 transitions. [2021-10-28 09:18:08,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:18:08,604 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,605 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 09:18:08,605 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash -356310728, now seen corresponding path program 1 times [2021-10-28 09:18:08,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447037665] [2021-10-28 09:18:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447037665] [2021-10-28 09:18:08,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447037665] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637031794] [2021-10-28 09:18:08,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,633 INFO L87 Difference]: Start difference. First operand 257 states and 399 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,652 INFO L93 Difference]: Finished difference Result 597 states and 929 transitions. [2021-10-28 09:18:08,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-28 09:18:08,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,655 INFO L225 Difference]: With dead ends: 597 [2021-10-28 09:18:08,655 INFO L226 Difference]: Without dead ends: 347 [2021-10-28 09:18:08,656 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-10-28 09:18:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2021-10-28 09:18:08,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.5203488372093024) internal successors, (523), 344 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2021-10-28 09:18:08,673 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 17 [2021-10-28 09:18:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,674 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2021-10-28 09:18:08,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2021-10-28 09:18:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:18:08,675 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,675 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:18:08,676 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1138420085, now seen corresponding path program 1 times [2021-10-28 09:18:08,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852931496] [2021-10-28 09:18:08,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852931496] [2021-10-28 09:18:08,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852931496] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195677129] [2021-10-28 09:18:08,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,702 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,718 INFO L93 Difference]: Finished difference Result 525 states and 793 transitions. [2021-10-28 09:18:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 09:18:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,721 INFO L225 Difference]: With dead ends: 525 [2021-10-28 09:18:08,721 INFO L226 Difference]: Without dead ends: 359 [2021-10-28 09:18:08,722 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-10-28 09:18:08,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2021-10-28 09:18:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 1.4915730337078652) internal successors, (531), 356 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 531 transitions. [2021-10-28 09:18:08,736 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 531 transitions. Word has length 18 [2021-10-28 09:18:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,737 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 531 transitions. [2021-10-28 09:18:08,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,737 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 531 transitions. [2021-10-28 09:18:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:18:08,738 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,738 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 09:18:08,738 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1839484663, now seen corresponding path program 1 times [2021-10-28 09:18:08,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773122564] [2021-10-28 09:18:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773122564] [2021-10-28 09:18:08,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773122564] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990622693] [2021-10-28 09:18:08,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,765 INFO L87 Difference]: Start difference. First operand 357 states and 531 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,784 INFO L93 Difference]: Finished difference Result 617 states and 925 transitions. [2021-10-28 09:18:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 09:18:08,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,789 INFO L225 Difference]: With dead ends: 617 [2021-10-28 09:18:08,789 INFO L226 Difference]: Without dead ends: 615 [2021-10-28 09:18:08,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-10-28 09:18:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 517. [2021-10-28 09:18:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 1.447674418604651) internal successors, (747), 516 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 747 transitions. [2021-10-28 09:18:08,818 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 747 transitions. Word has length 18 [2021-10-28 09:18:08,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,818 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 747 transitions. [2021-10-28 09:18:08,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 747 transitions. [2021-10-28 09:18:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 09:18:08,820 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 09:18:08,820 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1446457653, now seen corresponding path program 1 times [2021-10-28 09:18:08,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331619832] [2021-10-28 09:18:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331619832] [2021-10-28 09:18:08,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331619832] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814782408] [2021-10-28 09:18:08,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,845 INFO L87 Difference]: Start difference. First operand 517 states and 747 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,867 INFO L93 Difference]: Finished difference Result 1177 states and 1693 transitions. [2021-10-28 09:18:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-28 09:18:08,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,872 INFO L225 Difference]: With dead ends: 1177 [2021-10-28 09:18:08,872 INFO L226 Difference]: Without dead ends: 679 [2021-10-28 09:18:08,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-10-28 09:18:08,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 677. [2021-10-28 09:18:08,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.400887573964497) internal successors, (947), 676 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 947 transitions. [2021-10-28 09:18:08,898 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 947 transitions. Word has length 18 [2021-10-28 09:18:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,898 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 947 transitions. [2021-10-28 09:18:08,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,898 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 947 transitions. [2021-10-28 09:18:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:18:08,900 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,900 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 09:18:08,900 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1189665389, now seen corresponding path program 1 times [2021-10-28 09:18:08,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:08,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630695283] [2021-10-28 09:18:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:08,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:08,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630695283] [2021-10-28 09:18:08,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630695283] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:08,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:08,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:08,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779008313] [2021-10-28 09:18:08,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:08,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:08,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,925 INFO L87 Difference]: Start difference. First operand 677 states and 947 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:08,955 INFO L93 Difference]: Finished difference Result 1017 states and 1413 transitions. [2021-10-28 09:18:08,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:08,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 09:18:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:08,960 INFO L225 Difference]: With dead ends: 1017 [2021-10-28 09:18:08,961 INFO L226 Difference]: Without dead ends: 695 [2021-10-28 09:18:08,962 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:08,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-10-28 09:18:08,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 693. [2021-10-28 09:18:08,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.3684971098265897) internal successors, (947), 692 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 947 transitions. [2021-10-28 09:18:08,994 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 947 transitions. Word has length 19 [2021-10-28 09:18:08,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:08,995 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 947 transitions. [2021-10-28 09:18:08,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:08,995 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 947 transitions. [2021-10-28 09:18:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:18:08,998 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:08,998 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:08,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 09:18:08,999 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:08,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1890729967, now seen corresponding path program 1 times [2021-10-28 09:18:08,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:09,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813156911] [2021-10-28 09:18:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:09,003 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:09,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:09,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:09,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:09,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813156911] [2021-10-28 09:18:09,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813156911] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:09,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:09,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:09,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41641865] [2021-10-28 09:18:09,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:09,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:09,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:09,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:09,045 INFO L87 Difference]: Start difference. First operand 693 states and 947 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:09,079 INFO L93 Difference]: Finished difference Result 1161 states and 1589 transitions. [2021-10-28 09:18:09,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:09,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 09:18:09,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:09,087 INFO L225 Difference]: With dead ends: 1161 [2021-10-28 09:18:09,087 INFO L226 Difference]: Without dead ends: 1159 [2021-10-28 09:18:09,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:09,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-10-28 09:18:09,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1029. [2021-10-28 09:18:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 1.325875486381323) internal successors, (1363), 1028 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1363 transitions. [2021-10-28 09:18:09,146 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1363 transitions. Word has length 19 [2021-10-28 09:18:09,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:09,146 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 1363 transitions. [2021-10-28 09:18:09,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1363 transitions. [2021-10-28 09:18:09,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:18:09,151 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:09,151 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:09,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 09:18:09,158 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:09,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1497702957, now seen corresponding path program 1 times [2021-10-28 09:18:09,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:09,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345188747] [2021-10-28 09:18:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:09,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:09,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:09,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345188747] [2021-10-28 09:18:09,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345188747] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:09,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:09,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:09,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046299904] [2021-10-28 09:18:09,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:09,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:09,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:09,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:09,205 INFO L87 Difference]: Start difference. First operand 1029 states and 1363 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:09,241 INFO L93 Difference]: Finished difference Result 2313 states and 3029 transitions. [2021-10-28 09:18:09,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:09,242 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 09:18:09,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:09,249 INFO L225 Difference]: With dead ends: 2313 [2021-10-28 09:18:09,249 INFO L226 Difference]: Without dead ends: 1319 [2021-10-28 09:18:09,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:09,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-10-28 09:18:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2021-10-28 09:18:09,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 1316 states have (on average 1.2667173252279635) internal successors, (1667), 1316 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1667 transitions. [2021-10-28 09:18:09,297 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1667 transitions. Word has length 19 [2021-10-28 09:18:09,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:09,298 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 1667 transitions. [2021-10-28 09:18:09,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,298 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1667 transitions. [2021-10-28 09:18:09,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:18:09,300 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:09,300 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:09,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 09:18:09,301 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1516697142, now seen corresponding path program 1 times [2021-10-28 09:18:09,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:09,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258960150] [2021-10-28 09:18:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:09,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:09,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:09,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258960150] [2021-10-28 09:18:09,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258960150] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:09,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:09,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:09,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033962298] [2021-10-28 09:18:09,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:09,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:09,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:09,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:09,345 INFO L87 Difference]: Start difference. First operand 1317 states and 1667 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:09,380 INFO L93 Difference]: Finished difference Result 1977 states and 2485 transitions. [2021-10-28 09:18:09,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:09,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 09:18:09,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:09,389 INFO L225 Difference]: With dead ends: 1977 [2021-10-28 09:18:09,389 INFO L226 Difference]: Without dead ends: 1351 [2021-10-28 09:18:09,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:09,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-10-28 09:18:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1349. [2021-10-28 09:18:09,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 1.236646884272997) internal successors, (1667), 1348 states have internal predecessors, (1667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1667 transitions. [2021-10-28 09:18:09,455 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1667 transitions. Word has length 20 [2021-10-28 09:18:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:09,455 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 1667 transitions. [2021-10-28 09:18:09,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1667 transitions. [2021-10-28 09:18:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:18:09,458 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:09,458 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:09,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 09:18:09,458 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:09,459 INFO L85 PathProgramCache]: Analyzing trace with hash -815632564, now seen corresponding path program 1 times [2021-10-28 09:18:09,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:09,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609737795] [2021-10-28 09:18:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:09,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:09,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:09,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:09,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609737795] [2021-10-28 09:18:09,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609737795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:09,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:09,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:09,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966033482] [2021-10-28 09:18:09,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:09,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:09,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:09,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:09,496 INFO L87 Difference]: Start difference. First operand 1349 states and 1667 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:09,556 INFO L93 Difference]: Finished difference Result 2183 states and 2660 transitions. [2021-10-28 09:18:09,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:09,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 09:18:09,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:09,568 INFO L225 Difference]: With dead ends: 2183 [2021-10-28 09:18:09,569 INFO L226 Difference]: Without dead ends: 2181 [2021-10-28 09:18:09,570 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-10-28 09:18:09,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2053. [2021-10-28 09:18:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 1.2022417153996101) internal successors, (2467), 2052 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 2467 transitions. [2021-10-28 09:18:09,646 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 2467 transitions. Word has length 20 [2021-10-28 09:18:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:09,648 INFO L470 AbstractCegarLoop]: Abstraction has 2053 states and 2467 transitions. [2021-10-28 09:18:09,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 2467 transitions. [2021-10-28 09:18:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 09:18:09,651 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:18:09,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:09,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 09:18:09,652 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:18:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:09,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1208659574, now seen corresponding path program 1 times [2021-10-28 09:18:09,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:09,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064719066] [2021-10-28 09:18:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:09,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:09,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:09,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064719066] [2021-10-28 09:18:09,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064719066] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:09,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:09,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:09,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335853918] [2021-10-28 09:18:09,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:18:09,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:09,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:09,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:09,686 INFO L87 Difference]: Start difference. First operand 2053 states and 2467 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:09,747 INFO L93 Difference]: Finished difference Result 4549 states and 5347 transitions. [2021-10-28 09:18:09,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:09,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-28 09:18:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:18:09,748 INFO L225 Difference]: With dead ends: 4549 [2021-10-28 09:18:09,748 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:18:09,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:09,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:18:09,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:18:09,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:18:09,752 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-10-28 09:18:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:18:09,752 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:18:09,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:18:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:18:09,753 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:18:09,755 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:18:09,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 09:18:09,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-28 09:18:09,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:18:09,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:18:09,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:18:09,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-28 09:18:09,771 INFO L857 garLoopResultBuilder]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,771 INFO L857 garLoopResultBuilder]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,771 INFO L857 garLoopResultBuilder]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,771 INFO L857 garLoopResultBuilder]: For program point L94(line 94) no Hoare annotation was computed. [2021-10-28 09:18:09,771 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-28 09:18:09,772 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-28 09:18:09,772 INFO L857 garLoopResultBuilder]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,772 INFO L860 garLoopResultBuilder]: At program point L119(lines 7 123) the Hoare annotation is: true [2021-10-28 09:18:09,772 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 55) no Hoare annotation was computed. [2021-10-28 09:18:09,772 INFO L857 garLoopResultBuilder]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,772 INFO L857 garLoopResultBuilder]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,772 INFO L857 garLoopResultBuilder]: For program point L104(line 104) no Hoare annotation was computed. [2021-10-28 09:18:09,773 INFO L857 garLoopResultBuilder]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,773 INFO L860 garLoopResultBuilder]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2021-10-28 09:18:09,773 INFO L860 garLoopResultBuilder]: At program point L122(lines 6 123) the Hoare annotation is: true [2021-10-28 09:18:09,773 INFO L857 garLoopResultBuilder]: For program point L89(line 89) no Hoare annotation was computed. [2021-10-28 09:18:09,773 INFO L857 garLoopResultBuilder]: For program point L114(line 114) no Hoare annotation was computed. [2021-10-28 09:18:09,773 INFO L853 garLoopResultBuilder]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2021-10-28 09:18:09,773 INFO L857 garLoopResultBuilder]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,773 INFO L857 garLoopResultBuilder]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,774 INFO L857 garLoopResultBuilder]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,774 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-28 09:18:09,774 INFO L857 garLoopResultBuilder]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,774 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 121) no Hoare annotation was computed. [2021-10-28 09:18:09,774 INFO L857 garLoopResultBuilder]: For program point L99(line 99) no Hoare annotation was computed. [2021-10-28 09:18:09,774 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-28 09:18:09,774 INFO L857 garLoopResultBuilder]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,774 INFO L857 garLoopResultBuilder]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2021-10-28 09:18:09,774 INFO L857 garLoopResultBuilder]: For program point L34(lines 34 36) no Hoare annotation was computed. [2021-10-28 09:18:09,775 INFO L857 garLoopResultBuilder]: For program point L84(line 84) no Hoare annotation was computed. [2021-10-28 09:18:09,775 INFO L857 garLoopResultBuilder]: For program point L109(line 109) no Hoare annotation was computed. [2021-10-28 09:18:09,778 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:09,779 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:18:09,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:18:09 BoogieIcfgContainer [2021-10-28 09:18:09,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:18:09,787 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:18:09,787 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:18:09,787 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:18:09,787 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:18:07" (3/4) ... [2021-10-28 09:18:09,791 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:18:09,802 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 09:18:09,802 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-28 09:18:09,802 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:18:09,802 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:18:09,847 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:18:09,847 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:18:09,848 INFO L168 Benchmark]: Toolchain (without parser) took 3391.20 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 57.6 MB in the beginning and 119.3 MB in the end (delta: -61.8 MB). Peak memory consumption was 59.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:09,849 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 94.4 MB. Free memory was 74.2 MB in the beginning and 74.1 MB in the end (delta: 64.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:18:09,849 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.38 ms. Allocated memory is still 94.4 MB. Free memory was 57.4 MB in the beginning and 69.6 MB in the end (delta: -12.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:09,850 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.79 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 68.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:18:09,850 INFO L168 Benchmark]: Boogie Preprocessor took 23.66 ms. Allocated memory is still 94.4 MB. Free memory was 67.9 MB in the beginning and 67.0 MB in the end (delta: 937.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:09,850 INFO L168 Benchmark]: RCFGBuilder took 409.70 ms. Allocated memory is still 94.4 MB. Free memory was 66.7 MB in the beginning and 55.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:09,851 INFO L168 Benchmark]: TraceAbstraction took 2564.03 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 55.2 MB in the beginning and 51.1 MB in the end (delta: 4.1 MB). Peak memory consumption was 57.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:09,851 INFO L168 Benchmark]: Witness Printer took 60.09 ms. Allocated memory is still 144.7 MB. Free memory was 51.1 MB in the beginning and 119.3 MB in the end (delta: -68.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:09,853 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 94.4 MB. Free memory was 74.2 MB in the beginning and 74.1 MB in the end (delta: 64.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.38 ms. Allocated memory is still 94.4 MB. Free memory was 57.4 MB in the beginning and 69.6 MB in the end (delta: -12.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.79 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 68.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.66 ms. Allocated memory is still 94.4 MB. Free memory was 67.9 MB in the beginning and 67.0 MB in the end (delta: 937.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 409.70 ms. Allocated memory is still 94.4 MB. Free memory was 66.7 MB in the beginning and 55.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2564.03 ms. Allocated memory was 94.4 MB in the beginning and 144.7 MB in the end (delta: 50.3 MB). Free memory was 55.2 MB in the beginning and 51.1 MB in the end (delta: 4.1 MB). Peak memory consumption was 57.5 MB. Max. memory is 16.1 GB. * Witness Printer took 60.09 ms. Allocated memory is still 144.7 MB. Free memory was 51.1 MB in the beginning and 119.3 MB in the end (delta: -68.2 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 121]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 19, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1128 SDtfs, 543 SDslu, 729 SDs, 0 SdLazy, 101 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2053occurred in iteration=18, InterpolantAutomatonStates: 57, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 19 MinimizatonAttempts, 528 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 137 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 326 NumberOfCodeBlocks, 326 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 622 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-28 09:18:09,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e57a95c3-b2eb-4ba8-8695-8e883b29f543/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...