./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa --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 7faac2784283dee994e5ed7918d7d85d1512ca1f167512880a4c4b876443c5f9 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:07:34,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:07:34,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:07:34,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:07:34,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:07:34,843 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:07:34,844 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:07:34,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:07:34,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:07:34,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:07:34,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:07:34,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:07:34,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:07:34,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:07:34,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:07:34,853 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:07:34,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:07:34,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:07:34,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:07:34,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:07:34,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:07:34,861 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:07:34,862 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:07:34,863 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:07:34,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:07:34,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:07:34,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:07:34,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:07:34,867 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:07:34,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:07:34,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:07:34,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:07:34,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:07:34,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:07:34,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:07:34,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:07:34,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:07:34,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:07:34,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:07:34,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:07:34,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:07:34,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:07:34,895 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:07:34,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:07:34,896 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:07:34,896 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:07:34,896 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:07:34,896 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:07:34,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:07:34,897 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:07:34,897 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:07:34,897 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:07:34,897 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:07:34,897 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:07:34,898 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:07:34,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:07:34,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:07:34,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:07:34,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:07:34,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:07:34,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:07:34,899 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:07:34,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:07:34,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:07:34,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:07:34,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:07:34,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:07:34,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:07:34,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:07:34,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:07:34,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:07:34,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:07:34,900 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:07:34,900 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:07:34,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:07:34,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:07:34,900 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_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7faac2784283dee994e5ed7918d7d85d1512ca1f167512880a4c4b876443c5f9 [2021-12-06 21:07:35,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:07:35,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:07:35,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:07:35,114 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:07:35,114 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:07:35,115 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-06 21:07:35,160 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/data/9eeb5ee02/51677060256f49f49beef945c38f4e88/FLAG707a1fc33 [2021-12-06 21:07:35,720 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:07:35,720 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-06 21:07:35,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/data/9eeb5ee02/51677060256f49f49beef945c38f4e88/FLAG707a1fc33 [2021-12-06 21:07:36,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/data/9eeb5ee02/51677060256f49f49beef945c38f4e88 [2021-12-06 21:07:36,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:07:36,147 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:07:36,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:07:36,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:07:36,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:07:36,152 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:07:36" (1/1) ... [2021-12-06 21:07:36,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b6b9231 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:36, skipping insertion in model container [2021-12-06 21:07:36,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:07:36" (1/1) ... [2021-12-06 21:07:36,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:07:36,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:07:36,521 WARN L230 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_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[8786,8799] [2021-12-06 21:07:36,565 WARN L230 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_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[16076,16089] [2021-12-06 21:07:37,112 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:07:37,118 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:07:37,140 WARN L230 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_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[8786,8799] [2021-12-06 21:07:37,151 WARN L230 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_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/sv-benchmarks/c/combinations/pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c[16076,16089] [2021-12-06 21:07:37,516 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:07:37,538 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:07:37,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37 WrapperNode [2021-12-06 21:07:37,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:07:37,539 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:07:37,539 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:07:37,539 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:07:37,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (1/1) ... [2021-12-06 21:07:37,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (1/1) ... [2021-12-06 21:07:37,761 INFO L137 Inliner]: procedures = 36, calls = 21, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 5029 [2021-12-06 21:07:37,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:07:37,761 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:07:37,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:07:37,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:07:37,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (1/1) ... [2021-12-06 21:07:37,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (1/1) ... [2021-12-06 21:07:37,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (1/1) ... [2021-12-06 21:07:37,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (1/1) ... [2021-12-06 21:07:37,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (1/1) ... [2021-12-06 21:07:37,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (1/1) ... [2021-12-06 21:07:37,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (1/1) ... [2021-12-06 21:07:38,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:07:38,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:07:38,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:07:38,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:07:38,105 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (1/1) ... [2021-12-06 21:07:38,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:07:38,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:07:38,132 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:07:38,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:07:38,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:07:38,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:07:38,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:07:38,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:07:38,246 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:07:38,247 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:07:41,127 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:07:41,146 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:07:41,147 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 21:07:41,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:07:41 BoogieIcfgContainer [2021-12-06 21:07:41,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:07:41,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:07:41,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:07:41,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:07:41,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:07:36" (1/3) ... [2021-12-06 21:07:41,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741151e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:07:41, skipping insertion in model container [2021-12-06 21:07:41,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:07:37" (2/3) ... [2021-12-06 21:07:41,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@741151e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:07:41, skipping insertion in model container [2021-12-06 21:07:41,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:07:41" (3/3) ... [2021-12-06 21:07:41,156 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4_overflow.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-06 21:07:41,160 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:07:41,160 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 21:07:41,204 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:07:41,209 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 [2021-12-06 21:07:41,209 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 21:07:41,240 INFO L276 IsEmpty]: Start isEmpty. Operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:41,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:07:41,248 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:41,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:41,249 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:41,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1675876582, now seen corresponding path program 1 times [2021-12-06 21:07:41,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:41,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690740409] [2021-12-06 21:07:41,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:41,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:41,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690740409] [2021-12-06 21:07:41,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690740409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:41,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:41,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:07:41,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026469716] [2021-12-06 21:07:41,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:41,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:07:41,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:41,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:07:41,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:07:41,436 INFO L87 Difference]: Start difference. First operand has 893 states, 890 states have (on average 1.902247191011236) internal successors, (1693), 892 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:41,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:41,501 INFO L93 Difference]: Finished difference Result 1755 states and 3330 transitions. [2021-12-06 21:07:41,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:07:41,503 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-06 21:07:41,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:41,521 INFO L225 Difference]: With dead ends: 1755 [2021-12-06 21:07:41,521 INFO L226 Difference]: Without dead ends: 827 [2021-12-06 21:07:41,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:07:41,531 INFO L933 BasicCegarLoop]: 1624 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1624 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:41,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:41,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-12-06 21:07:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-12-06 21:07:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.8909090909090909) internal successors, (1560), 826 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1560 transitions. [2021-12-06 21:07:41,595 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1560 transitions. Word has length 30 [2021-12-06 21:07:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:41,596 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1560 transitions. [2021-12-06 21:07:41,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:41,596 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1560 transitions. [2021-12-06 21:07:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 21:07:41,598 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:41,598 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:41,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:07:41,599 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:41,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1541863076, now seen corresponding path program 1 times [2021-12-06 21:07:41,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:41,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994884234] [2021-12-06 21:07:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:41,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:41,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:41,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:41,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994884234] [2021-12-06 21:07:41,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994884234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:41,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:41,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:07:41,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264386014] [2021-12-06 21:07:41,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:41,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:07:41,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:41,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:07:41,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:07:41,725 INFO L87 Difference]: Start difference. First operand 827 states and 1560 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:41,825 INFO L93 Difference]: Finished difference Result 875 states and 1633 transitions. [2021-12-06 21:07:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:07:41,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-06 21:07:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:41,830 INFO L225 Difference]: With dead ends: 875 [2021-12-06 21:07:41,830 INFO L226 Difference]: Without dead ends: 827 [2021-12-06 21:07:41,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:07:41,832 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 3 mSDsluCounter, 4648 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6206 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:41,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6206 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-12-06 21:07:41,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 827. [2021-12-06 21:07:41,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 825 states have (on average 1.863030303030303) internal successors, (1537), 826 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1537 transitions. [2021-12-06 21:07:41,853 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1537 transitions. Word has length 30 [2021-12-06 21:07:41,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:41,853 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 1537 transitions. [2021-12-06 21:07:41,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:41,854 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1537 transitions. [2021-12-06 21:07:41,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 21:07:41,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:41,855 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:41,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:07:41,856 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash 159296799, now seen corresponding path program 1 times [2021-12-06 21:07:41,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:41,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814049754] [2021-12-06 21:07:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:41,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:41,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:41,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814049754] [2021-12-06 21:07:41,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814049754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:41,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:41,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:07:41,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833103609] [2021-12-06 21:07:41,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:41,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:07:41,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:41,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:07:41,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:41,918 INFO L87 Difference]: Start difference. First operand 827 states and 1537 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:41,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:41,947 INFO L93 Difference]: Finished difference Result 909 states and 1665 transitions. [2021-12-06 21:07:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:07:41,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 21:07:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:41,951 INFO L225 Difference]: With dead ends: 909 [2021-12-06 21:07:41,951 INFO L226 Difference]: Without dead ends: 865 [2021-12-06 21:07:41,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:41,953 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 1498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:41,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1659 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-12-06 21:07:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 863. [2021-12-06 21:07:41,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 861 states have (on average 1.8513356562137049) internal successors, (1594), 862 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:41,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1594 transitions. [2021-12-06 21:07:41,974 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1594 transitions. Word has length 52 [2021-12-06 21:07:41,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:41,974 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1594 transitions. [2021-12-06 21:07:41,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:41,974 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1594 transitions. [2021-12-06 21:07:41,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 21:07:41,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:41,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:41,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:07:41,976 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:41,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:41,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1780734059, now seen corresponding path program 1 times [2021-12-06 21:07:41,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:41,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783144191] [2021-12-06 21:07:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:41,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:42,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:42,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:42,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783144191] [2021-12-06 21:07:42,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783144191] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:42,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:42,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:07:42,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126109493] [2021-12-06 21:07:42,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:42,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:07:42,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:42,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:07:42,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:42,062 INFO L87 Difference]: Start difference. First operand 863 states and 1594 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:42,097 INFO L93 Difference]: Finished difference Result 1011 states and 1826 transitions. [2021-12-06 21:07:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:07:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 21:07:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:42,103 INFO L225 Difference]: With dead ends: 1011 [2021-12-06 21:07:42,103 INFO L226 Difference]: Without dead ends: 931 [2021-12-06 21:07:42,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:42,105 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 1494 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1494 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:42,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1494 Valid, 1658 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:42,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-12-06 21:07:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 929. [2021-12-06 21:07:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 927 states have (on average 1.8306364617044228) internal successors, (1697), 928 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1697 transitions. [2021-12-06 21:07:42,128 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1697 transitions. Word has length 52 [2021-12-06 21:07:42,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:42,128 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 1697 transitions. [2021-12-06 21:07:42,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1697 transitions. [2021-12-06 21:07:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 21:07:42,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:42,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:42,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:07:42,131 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:42,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:42,132 INFO L85 PathProgramCache]: Analyzing trace with hash 919948555, now seen corresponding path program 1 times [2021-12-06 21:07:42,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:42,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696435574] [2021-12-06 21:07:42,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:42,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:42,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:42,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696435574] [2021-12-06 21:07:42,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696435574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:42,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:42,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:07:42,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421600846] [2021-12-06 21:07:42,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:42,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:07:42,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:42,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:07:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:42,193 INFO L87 Difference]: Start difference. First operand 929 states and 1697 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:42,223 INFO L93 Difference]: Finished difference Result 1197 states and 2115 transitions. [2021-12-06 21:07:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:07:42,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 21:07:42,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:42,229 INFO L225 Difference]: With dead ends: 1197 [2021-12-06 21:07:42,229 INFO L226 Difference]: Without dead ends: 1051 [2021-12-06 21:07:42,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:42,230 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 1490 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1490 SdHoareTripleChecker+Valid, 1657 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:42,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1490 Valid, 1657 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-12-06 21:07:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 1049. [2021-12-06 21:07:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1047 states have (on average 1.7965616045845272) internal successors, (1881), 1048 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1881 transitions. [2021-12-06 21:07:42,255 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1881 transitions. Word has length 52 [2021-12-06 21:07:42,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:42,256 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 1881 transitions. [2021-12-06 21:07:42,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1881 transitions. [2021-12-06 21:07:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 21:07:42,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:42,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:42,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:07:42,257 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:42,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1515907135, now seen corresponding path program 1 times [2021-12-06 21:07:42,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:42,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854077530] [2021-12-06 21:07:42,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:42,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:42,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:42,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854077530] [2021-12-06 21:07:42,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854077530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:42,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:42,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:07:42,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840711684] [2021-12-06 21:07:42,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:42,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:07:42,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:42,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:07:42,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:42,297 INFO L87 Difference]: Start difference. First operand 1049 states and 1881 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:42,326 INFO L93 Difference]: Finished difference Result 1533 states and 2627 transitions. [2021-12-06 21:07:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:07:42,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 21:07:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:42,333 INFO L225 Difference]: With dead ends: 1533 [2021-12-06 21:07:42,333 INFO L226 Difference]: Without dead ends: 1267 [2021-12-06 21:07:42,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:42,334 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1486 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1486 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:42,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1486 Valid, 1656 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:42,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2021-12-06 21:07:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 1265. [2021-12-06 21:07:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1263 states have (on average 1.7458432304038005) internal successors, (2205), 1264 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 2205 transitions. [2021-12-06 21:07:42,364 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 2205 transitions. Word has length 52 [2021-12-06 21:07:42,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:42,364 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 2205 transitions. [2021-12-06 21:07:42,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 2205 transitions. [2021-12-06 21:07:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 21:07:42,365 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:42,365 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:42,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:07:42,366 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:42,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1924545907, now seen corresponding path program 1 times [2021-12-06 21:07:42,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:42,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31537680] [2021-12-06 21:07:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:42,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:42,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:42,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31537680] [2021-12-06 21:07:42,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31537680] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:42,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:42,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:42,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309386122] [2021-12-06 21:07:42,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:42,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:42,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:42,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:42,414 INFO L87 Difference]: Start difference. First operand 1265 states and 2205 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:42,581 INFO L93 Difference]: Finished difference Result 5121 states and 8101 transitions. [2021-12-06 21:07:42,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:07:42,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 21:07:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:42,602 INFO L225 Difference]: With dead ends: 5121 [2021-12-06 21:07:42,602 INFO L226 Difference]: Without dead ends: 4639 [2021-12-06 21:07:42,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:07:42,605 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 6521 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6521 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:42,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6521 Valid, 2068 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:42,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4639 states. [2021-12-06 21:07:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4639 to 1745. [2021-12-06 21:07:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1745 states, 1743 states have (on average 1.6689615605278256) internal successors, (2909), 1744 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1745 states to 1745 states and 2909 transitions. [2021-12-06 21:07:42,681 INFO L78 Accepts]: Start accepts. Automaton has 1745 states and 2909 transitions. Word has length 52 [2021-12-06 21:07:42,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:42,681 INFO L470 AbstractCegarLoop]: Abstraction has 1745 states and 2909 transitions. [2021-12-06 21:07:42,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1745 states and 2909 transitions. [2021-12-06 21:07:42,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 21:07:42,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:42,682 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:42,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 21:07:42,682 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:42,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1236981091, now seen corresponding path program 1 times [2021-12-06 21:07:42,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:42,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249040941] [2021-12-06 21:07:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:42,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:42,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:42,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249040941] [2021-12-06 21:07:42,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249040941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:42,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:42,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:07:42,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134445207] [2021-12-06 21:07:42,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:42,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:07:42,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:42,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:07:42,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:42,721 INFO L87 Difference]: Start difference. First operand 1745 states and 2909 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) [2021-12-06 21:07:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:42,801 INFO L93 Difference]: Finished difference Result 3151 states and 5009 transitions. [2021-12-06 21:07:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:07:42,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) Word has length 54 [2021-12-06 21:07:42,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:42,811 INFO L225 Difference]: With dead ends: 3151 [2021-12-06 21:07:42,812 INFO L226 Difference]: Without dead ends: 2189 [2021-12-06 21:07:42,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:42,814 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1478 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1478 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:42,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1478 Valid, 1623 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-12-06 21:07:42,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2021-12-06 21:07:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6215102974828375) internal successors, (3543), 2186 states have internal predecessors, (3543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3543 transitions. [2021-12-06 21:07:42,881 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3543 transitions. Word has length 54 [2021-12-06 21:07:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:42,881 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3543 transitions. [2021-12-06 21:07:42,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 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) [2021-12-06 21:07:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3543 transitions. [2021-12-06 21:07:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 21:07:42,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:42,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:42,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 21:07:42,882 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:42,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:42,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1303474603, now seen corresponding path program 1 times [2021-12-06 21:07:42,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:42,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457457995] [2021-12-06 21:07:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:42,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:42,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:42,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:42,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457457995] [2021-12-06 21:07:42,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457457995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:42,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:42,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:42,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716173175] [2021-12-06 21:07:42,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:42,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:42,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:42,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:42,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:42,974 INFO L87 Difference]: Start difference. First operand 2187 states and 3543 transitions. Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 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) [2021-12-06 21:07:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:43,102 INFO L93 Difference]: Finished difference Result 3591 states and 5617 transitions. [2021-12-06 21:07:43,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:07:43,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 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) Word has length 54 [2021-12-06 21:07:43,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:43,112 INFO L225 Difference]: With dead ends: 3591 [2021-12-06 21:07:43,112 INFO L226 Difference]: Without dead ends: 2189 [2021-12-06 21:07:43,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:07:43,114 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 3072 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3072 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:43,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3072 Valid, 1732 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:43,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2021-12-06 21:07:43,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 2187. [2021-12-06 21:07:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.6105263157894736) internal successors, (3519), 2186 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3519 transitions. [2021-12-06 21:07:43,179 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3519 transitions. Word has length 54 [2021-12-06 21:07:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:43,179 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3519 transitions. [2021-12-06 21:07:43,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 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) [2021-12-06 21:07:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3519 transitions. [2021-12-06 21:07:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 21:07:43,180 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:43,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:43,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 21:07:43,180 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1338283904, now seen corresponding path program 1 times [2021-12-06 21:07:43,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:43,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439565586] [2021-12-06 21:07:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:43,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:43,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:43,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439565586] [2021-12-06 21:07:43,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439565586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:43,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:43,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:07:43,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283294424] [2021-12-06 21:07:43,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:43,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:43,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:43,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:43,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:43,225 INFO L87 Difference]: Start difference. First operand 2187 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:43,357 INFO L93 Difference]: Finished difference Result 3589 states and 5568 transitions. [2021-12-06 21:07:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:07:43,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-06 21:07:43,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:43,369 INFO L225 Difference]: With dead ends: 3589 [2021-12-06 21:07:43,370 INFO L226 Difference]: Without dead ends: 2187 [2021-12-06 21:07:43,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:07:43,373 INFO L933 BasicCegarLoop]: 1503 mSDtfsCounter, 4543 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4543 SdHoareTripleChecker+Valid, 2992 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:43,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4543 Valid, 2992 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:43,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-12-06 21:07:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2021-12-06 21:07:43,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.59954233409611) internal successors, (3495), 2186 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:43,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3495 transitions. [2021-12-06 21:07:43,490 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3495 transitions. Word has length 55 [2021-12-06 21:07:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:43,491 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3495 transitions. [2021-12-06 21:07:43,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:43,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3495 transitions. [2021-12-06 21:07:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 21:07:43,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:43,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:43,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 21:07:43,492 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:43,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:43,492 INFO L85 PathProgramCache]: Analyzing trace with hash 637219326, now seen corresponding path program 1 times [2021-12-06 21:07:43,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:43,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953511588] [2021-12-06 21:07:43,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:43,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:43,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:43,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953511588] [2021-12-06 21:07:43,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953511588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:43,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:43,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:07:43,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89133785] [2021-12-06 21:07:43,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:43,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:43,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:43,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:43,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:43,540 INFO L87 Difference]: Start difference. First operand 2187 states and 3495 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:43,683 INFO L93 Difference]: Finished difference Result 3589 states and 5520 transitions. [2021-12-06 21:07:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:07:43,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-06 21:07:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:43,693 INFO L225 Difference]: With dead ends: 3589 [2021-12-06 21:07:43,693 INFO L226 Difference]: Without dead ends: 2187 [2021-12-06 21:07:43,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:07:43,696 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4627 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:43,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4627 Valid, 2982 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-12-06 21:07:43,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2187. [2021-12-06 21:07:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2187 states, 2185 states have (on average 1.588558352402746) internal successors, (3471), 2186 states have internal predecessors, (3471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:43,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2187 states to 2187 states and 3471 transitions. [2021-12-06 21:07:43,784 INFO L78 Accepts]: Start accepts. Automaton has 2187 states and 3471 transitions. Word has length 55 [2021-12-06 21:07:43,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:43,784 INFO L470 AbstractCegarLoop]: Abstraction has 2187 states and 3471 transitions. [2021-12-06 21:07:43,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:43,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2187 states and 3471 transitions. [2021-12-06 21:07:43,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 21:07:43,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:43,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:43,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 21:07:43,785 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:43,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:43,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1917083004, now seen corresponding path program 1 times [2021-12-06 21:07:43,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:43,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777951622] [2021-12-06 21:07:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:43,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:43,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:43,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777951622] [2021-12-06 21:07:43,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777951622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:43,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:43,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:07:43,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775340171] [2021-12-06 21:07:43,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:43,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:07:43,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:43,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:07:43,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:07:43,832 INFO L87 Difference]: Start difference. First operand 2187 states and 3471 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:43,983 INFO L93 Difference]: Finished difference Result 3418 states and 5169 transitions. [2021-12-06 21:07:43,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 21:07:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-06 21:07:43,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:43,997 INFO L225 Difference]: With dead ends: 3418 [2021-12-06 21:07:43,997 INFO L226 Difference]: Without dead ends: 3416 [2021-12-06 21:07:43,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:07:43,999 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 172 mSDsluCounter, 4598 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 6153 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:43,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 6153 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2021-12-06 21:07:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 2283. [2021-12-06 21:07:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2281 states have (on average 1.5602805786935554) internal successors, (3559), 2282 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:44,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 3559 transitions. [2021-12-06 21:07:44,091 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 3559 transitions. Word has length 55 [2021-12-06 21:07:44,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:44,091 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 3559 transitions. [2021-12-06 21:07:44,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:44,091 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 3559 transitions. [2021-12-06 21:07:44,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 21:07:44,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:44,092 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:44,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 21:07:44,092 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:44,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:44,092 INFO L85 PathProgramCache]: Analyzing trace with hash -748597284, now seen corresponding path program 1 times [2021-12-06 21:07:44,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:44,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789914000] [2021-12-06 21:07:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:44,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:44,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:44,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789914000] [2021-12-06 21:07:44,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789914000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:44,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:44,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:07:44,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869290906] [2021-12-06 21:07:44,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:44,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:07:44,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:44,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:07:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:44,120 INFO L87 Difference]: Start difference. First operand 2283 states and 3559 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:46,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:46,647 INFO L93 Difference]: Finished difference Result 3787 states and 6432 transitions. [2021-12-06 21:07:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:07:46,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-12-06 21:07:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:46,661 INFO L225 Difference]: With dead ends: 3787 [2021-12-06 21:07:46,661 INFO L226 Difference]: Without dead ends: 3034 [2021-12-06 21:07:46,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:07:46,664 INFO L933 BasicCegarLoop]: 564 mSDtfsCounter, 834 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 652 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 652 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:46,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 571 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [652 Valid, 2261 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-06 21:07:46,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3034 states. [2021-12-06 21:07:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3034 to 3034. [2021-12-06 21:07:46,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3034 states, 3032 states have (on average 1.4967018469656992) internal successors, (4538), 3033 states have internal predecessors, (4538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4538 transitions. [2021-12-06 21:07:46,800 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4538 transitions. Word has length 63 [2021-12-06 21:07:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:46,801 INFO L470 AbstractCegarLoop]: Abstraction has 3034 states and 4538 transitions. [2021-12-06 21:07:46,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4538 transitions. [2021-12-06 21:07:46,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 21:07:46,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:46,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:46,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 21:07:46,803 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:46,804 INFO L85 PathProgramCache]: Analyzing trace with hash -484645446, now seen corresponding path program 1 times [2021-12-06 21:07:46,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:46,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368156743] [2021-12-06 21:07:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:46,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 21:07:46,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:46,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368156743] [2021-12-06 21:07:46,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368156743] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:46,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:46,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:46,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816045401] [2021-12-06 21:07:46,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:46,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:46,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:46,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:46,886 INFO L87 Difference]: Start difference. First operand 3034 states and 4538 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:47,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:47,174 INFO L93 Difference]: Finished difference Result 9340 states and 13307 transitions. [2021-12-06 21:07:47,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:07:47,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 21:07:47,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:47,187 INFO L225 Difference]: With dead ends: 9340 [2021-12-06 21:07:47,187 INFO L226 Difference]: Without dead ends: 7842 [2021-12-06 21:07:47,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:07:47,190 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4751 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4751 SdHoareTripleChecker+Valid, 3330 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:47,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4751 Valid, 3330 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:47,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7842 states. [2021-12-06 21:07:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7842 to 4530. [2021-12-06 21:07:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4530 states, 4528 states have (on average 1.4580388692579505) internal successors, (6602), 4529 states have internal predecessors, (6602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4530 states to 4530 states and 6602 transitions. [2021-12-06 21:07:47,348 INFO L78 Accepts]: Start accepts. Automaton has 4530 states and 6602 transitions. Word has length 79 [2021-12-06 21:07:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:47,348 INFO L470 AbstractCegarLoop]: Abstraction has 4530 states and 6602 transitions. [2021-12-06 21:07:47,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:47,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4530 states and 6602 transitions. [2021-12-06 21:07:47,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 21:07:47,349 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:47,350 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:47,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 21:07:47,350 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:47,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:47,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2041539034, now seen corresponding path program 1 times [2021-12-06 21:07:47,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:47,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224283040] [2021-12-06 21:07:47,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:47,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 21:07:47,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:47,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224283040] [2021-12-06 21:07:47,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224283040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:47,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:47,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:47,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411077113] [2021-12-06 21:07:47,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:47,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:47,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:47,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:47,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:47,394 INFO L87 Difference]: Start difference. First operand 4530 states and 6602 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:47,759 INFO L93 Difference]: Finished difference Result 10836 states and 15371 transitions. [2021-12-06 21:07:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:07:47,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 21:07:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:47,771 INFO L225 Difference]: With dead ends: 10836 [2021-12-06 21:07:47,771 INFO L226 Difference]: Without dead ends: 9338 [2021-12-06 21:07:47,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:07:47,775 INFO L933 BasicCegarLoop]: 1592 mSDtfsCounter, 4708 mSDsluCounter, 1774 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4708 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:47,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4708 Valid, 3366 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2021-12-06 21:07:48,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 6778. [2021-12-06 21:07:48,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6778 states, 6776 states have (on average 1.42827626918536) internal successors, (9678), 6777 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:48,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6778 states to 6778 states and 9678 transitions. [2021-12-06 21:07:48,085 INFO L78 Accepts]: Start accepts. Automaton has 6778 states and 9678 transitions. Word has length 79 [2021-12-06 21:07:48,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:48,085 INFO L470 AbstractCegarLoop]: Abstraction has 6778 states and 9678 transitions. [2021-12-06 21:07:48,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:48,085 INFO L276 IsEmpty]: Start isEmpty. Operand 6778 states and 9678 transitions. [2021-12-06 21:07:48,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 21:07:48,087 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:48,088 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:48,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 21:07:48,088 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:48,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:48,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1121788422, now seen corresponding path program 1 times [2021-12-06 21:07:48,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:48,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069061241] [2021-12-06 21:07:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:48,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:07:48,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:48,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069061241] [2021-12-06 21:07:48,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069061241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:48,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:48,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:48,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185964511] [2021-12-06 21:07:48,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:48,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:48,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:48,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:48,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:48,139 INFO L87 Difference]: Start difference. First operand 6778 states and 9678 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:48,538 INFO L93 Difference]: Finished difference Result 12332 states and 17435 transitions. [2021-12-06 21:07:48,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:07:48,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 21:07:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:48,553 INFO L225 Difference]: With dead ends: 12332 [2021-12-06 21:07:48,553 INFO L226 Difference]: Without dead ends: 10834 [2021-12-06 21:07:48,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:07:48,557 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 4740 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4740 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:48,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4740 Valid, 3382 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:48,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10834 states. [2021-12-06 21:07:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10834 to 8274. [2021-12-06 21:07:48,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8272 states have (on average 1.4194874274661509) internal successors, (11742), 8273 states have internal predecessors, (11742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 11742 transitions. [2021-12-06 21:07:48,872 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 11742 transitions. Word has length 79 [2021-12-06 21:07:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:48,872 INFO L470 AbstractCegarLoop]: Abstraction has 8274 states and 11742 transitions. [2021-12-06 21:07:48,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 11742 transitions. [2021-12-06 21:07:48,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-06 21:07:48,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:48,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:48,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 21:07:48,875 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:48,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:48,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1937719834, now seen corresponding path program 1 times [2021-12-06 21:07:48,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:48,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5282286] [2021-12-06 21:07:48,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:48,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:07:48,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:48,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5282286] [2021-12-06 21:07:48,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5282286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:07:48,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:07:48,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:07:48,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252652782] [2021-12-06 21:07:48,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:07:48,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:07:48,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:48,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:07:48,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:07:48,925 INFO L87 Difference]: Start difference. First operand 8274 states and 11742 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:07:49,390 INFO L93 Difference]: Finished difference Result 12948 states and 18299 transitions. [2021-12-06 21:07:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:07:49,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-12-06 21:07:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:07:49,401 INFO L225 Difference]: With dead ends: 12948 [2021-12-06 21:07:49,401 INFO L226 Difference]: Without dead ends: 11890 [2021-12-06 21:07:49,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:07:49,405 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 4739 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4739 SdHoareTripleChecker+Valid, 3335 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:07:49,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4739 Valid, 3335 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:07:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11890 states. [2021-12-06 21:07:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11890 to 9330. [2021-12-06 21:07:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9330 states, 9328 states have (on average 1.4165951972555746) internal successors, (13214), 9329 states have internal predecessors, (13214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:49,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 13214 transitions. [2021-12-06 21:07:49,801 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 13214 transitions. Word has length 79 [2021-12-06 21:07:49,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:07:49,801 INFO L470 AbstractCegarLoop]: Abstraction has 9330 states and 13214 transitions. [2021-12-06 21:07:49,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:07:49,801 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 13214 transitions. [2021-12-06 21:07:49,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 21:07:49,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:07:49,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:07:49,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 21:07:49,804 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:07:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:07:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash -596667294, now seen corresponding path program 1 times [2021-12-06 21:07:49,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:07:49,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853910538] [2021-12-06 21:07:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:49,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:07:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:49,972 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:07:49,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:07:49,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853910538] [2021-12-06 21:07:49,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853910538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:07:49,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865653263] [2021-12-06 21:07:49,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:07:49,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:07:49,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:07:49,974 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:07:49,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:07:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:07:50,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 21:07:50,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:07:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:07:50,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:07:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:07:50,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865653263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:07:50,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:07:50,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-06 21:07:50,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836638937] [2021-12-06 21:07:50,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:07:50,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 21:07:50,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:07:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 21:07:50,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:07:50,480 INFO L87 Difference]: Start difference. First operand 9330 states and 13214 transitions. Second operand has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:08:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:08:00,498 INFO L93 Difference]: Finished difference Result 116598 states and 160124 transitions. [2021-12-06 21:08:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-12-06 21:08:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-12-06 21:08:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:08:00,652 INFO L225 Difference]: With dead ends: 116598 [2021-12-06 21:08:00,652 INFO L226 Difference]: Without dead ends: 108804 [2021-12-06 21:08:00,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11149 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4231, Invalid=21209, Unknown=0, NotChecked=0, Total=25440 [2021-12-06 21:08:00,678 INFO L933 BasicCegarLoop]: 1657 mSDtfsCounter, 14359 mSDsluCounter, 5776 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14359 SdHoareTripleChecker+Valid, 7433 SdHoareTripleChecker+Invalid, 2086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:08:00,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14359 Valid, 7433 Invalid, 2086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 21:08:00,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108804 states. [2021-12-06 21:08:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108804 to 55658. [2021-12-06 21:08:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55658 states, 55656 states have (on average 1.3617220066120455) internal successors, (75788), 55657 states have internal predecessors, (75788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:08:04,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55658 states to 55658 states and 75788 transitions. [2021-12-06 21:08:04,301 INFO L78 Accepts]: Start accepts. Automaton has 55658 states and 75788 transitions. Word has length 80 [2021-12-06 21:08:04,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:08:04,301 INFO L470 AbstractCegarLoop]: Abstraction has 55658 states and 75788 transitions. [2021-12-06 21:08:04,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.38888888888889) internal successors, (223), 18 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:08:04,302 INFO L276 IsEmpty]: Start isEmpty. Operand 55658 states and 75788 transitions. [2021-12-06 21:08:04,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 21:08:04,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:08:04,305 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:08:04,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:08:04,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 21:08:04,506 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:08:04,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:08:04,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2064719954, now seen corresponding path program 1 times [2021-12-06 21:08:04,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:08:04,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729628379] [2021-12-06 21:08:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:04,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:08:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:08:04,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:08:04,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729628379] [2021-12-06 21:08:04,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729628379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:08:04,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072277940] [2021-12-06 21:08:04,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:08:04,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:08:04,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:08:04,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:08:04,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:08:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:08:04,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 21:08:04,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:08:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:08:05,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:08:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:08:05,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072277940] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:08:05,744 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:08:05,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-12-06 21:08:05,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259392007] [2021-12-06 21:08:05,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:08:05,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 21:08:05,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:08:05,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 21:08:05,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-12-06 21:08:05,746 INFO L87 Difference]: Start difference. First operand 55658 states and 75788 transitions. Second operand has 25 states, 25 states have (on average 8.12) internal successors, (203), 24 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:08:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:08:56,826 INFO L93 Difference]: Finished difference Result 732083 states and 971319 transitions. [2021-12-06 21:08:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2021-12-06 21:08:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.12) internal successors, (203), 24 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 21:08:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:08:57,826 INFO L225 Difference]: With dead ends: 732083 [2021-12-06 21:08:57,826 INFO L226 Difference]: Without dead ends: 677961 [2021-12-06 21:08:58,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16234 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5337, Invalid=36483, Unknown=0, NotChecked=0, Total=41820 [2021-12-06 21:08:58,172 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 20464 mSDsluCounter, 10033 mSDsCounter, 0 mSdLazyCounter, 2719 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20464 SdHoareTripleChecker+Valid, 11715 SdHoareTripleChecker+Invalid, 3038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 2719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 21:08:58,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20464 Valid, 11715 Invalid, 3038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 2719 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 21:08:58,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677961 states. [2021-12-06 21:09:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677961 to 253854. [2021-12-06 21:09:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253854 states, 253852 states have (on average 1.3468595874761673) internal successors, (341903), 253853 states have internal predecessors, (341903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:09:19,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253854 states to 253854 states and 341903 transitions. [2021-12-06 21:09:19,864 INFO L78 Accepts]: Start accepts. Automaton has 253854 states and 341903 transitions. Word has length 81 [2021-12-06 21:09:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:19,864 INFO L470 AbstractCegarLoop]: Abstraction has 253854 states and 341903 transitions. [2021-12-06 21:09:19,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.12) internal successors, (203), 24 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:09:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 253854 states and 341903 transitions. [2021-12-06 21:09:19,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 21:09:19,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:19,871 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:09:19,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:09:20,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:09:20,072 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:20,073 INFO L85 PathProgramCache]: Analyzing trace with hash 526176474, now seen corresponding path program 1 times [2021-12-06 21:09:20,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:20,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314589541] [2021-12-06 21:09:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:20,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:09:20,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:20,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314589541] [2021-12-06 21:09:20,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314589541] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:20,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:20,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:09:20,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419273375] [2021-12-06 21:09:20,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:20,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:09:20,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:20,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:09:20,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:09:20,123 INFO L87 Difference]: Start difference. First operand 253854 states and 341903 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:09:38,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:09:38,293 INFO L93 Difference]: Finished difference Result 506174 states and 681358 transitions. [2021-12-06 21:09:38,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:09:38,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 21:09:38,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:09:38,655 INFO L225 Difference]: With dead ends: 506174 [2021-12-06 21:09:38,655 INFO L226 Difference]: Without dead ends: 253856 [2021-12-06 21:09:38,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:09:38,776 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 37 mSDsluCounter, 1522 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3084 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:09:38,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 3084 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:09:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253856 states. [2021-12-06 21:09:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253856 to 248262. [2021-12-06 21:09:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248262 states, 248260 states have (on average 1.3243011359059051) internal successors, (328771), 248261 states have internal predecessors, (328771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:09:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248262 states to 248262 states and 328771 transitions. [2021-12-06 21:09:57,083 INFO L78 Accepts]: Start accepts. Automaton has 248262 states and 328771 transitions. Word has length 81 [2021-12-06 21:09:57,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:09:57,083 INFO L470 AbstractCegarLoop]: Abstraction has 248262 states and 328771 transitions. [2021-12-06 21:09:57,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:09:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 248262 states and 328771 transitions. [2021-12-06 21:09:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 21:09:57,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:09:57,087 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:09:57,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 21:09:57,087 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:09:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:09:57,087 INFO L85 PathProgramCache]: Analyzing trace with hash 252488762, now seen corresponding path program 1 times [2021-12-06 21:09:57,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:09:57,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246690530] [2021-12-06 21:09:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:09:57,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:09:57,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:09:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:09:57,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:09:57,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246690530] [2021-12-06 21:09:57,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246690530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:09:57,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:09:57,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:09:57,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46665993] [2021-12-06 21:09:57,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:09:57,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:09:57,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:09:57,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:09:57,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:09:57,116 INFO L87 Difference]: Start difference. First operand 248262 states and 328771 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:07,079 INFO L93 Difference]: Finished difference Result 386578 states and 510614 transitions. [2021-12-06 21:10:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:10:07,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 21:10:07,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:07,265 INFO L225 Difference]: With dead ends: 386578 [2021-12-06 21:10:07,265 INFO L226 Difference]: Without dead ends: 139852 [2021-12-06 21:10:07,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:07,343 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 30 mSDsluCounter, 1519 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 3076 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:07,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 3076 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:10:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139852 states. [2021-12-06 21:10:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139852 to 136034. [2021-12-06 21:10:17,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136034 states, 136032 states have (on average 1.2893069277816984) internal successors, (175387), 136033 states have internal predecessors, (175387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:17,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136034 states to 136034 states and 175387 transitions. [2021-12-06 21:10:17,315 INFO L78 Accepts]: Start accepts. Automaton has 136034 states and 175387 transitions. Word has length 81 [2021-12-06 21:10:17,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:17,315 INFO L470 AbstractCegarLoop]: Abstraction has 136034 states and 175387 transitions. [2021-12-06 21:10:17,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 136034 states and 175387 transitions. [2021-12-06 21:10:17,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 21:10:17,317 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:17,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:17,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 21:10:17,318 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:17,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash 176324506, now seen corresponding path program 1 times [2021-12-06 21:10:17,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:17,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274590605] [2021-12-06 21:10:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:17,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:17,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:17,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274590605] [2021-12-06 21:10:17,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274590605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:17,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:17,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:10:17,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283237233] [2021-12-06 21:10:17,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:17,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:10:17,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:10:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:17,345 INFO L87 Difference]: Start difference. First operand 136034 states and 175387 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:21,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:21,920 INFO L93 Difference]: Finished difference Result 197474 states and 253928 transitions. [2021-12-06 21:10:21,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:10:21,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 21:10:21,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:21,993 INFO L225 Difference]: With dead ends: 197474 [2021-12-06 21:10:21,993 INFO L226 Difference]: Without dead ends: 62976 [2021-12-06 21:10:22,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:22,043 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 24 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3066 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:22,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 3066 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:10:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62976 states. [2021-12-06 21:10:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62976 to 60706. [2021-12-06 21:10:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60706 states, 60704 states have (on average 1.2691255930416447) internal successors, (77041), 60705 states have internal predecessors, (77041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:26,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60706 states to 60706 states and 77041 transitions. [2021-12-06 21:10:26,412 INFO L78 Accepts]: Start accepts. Automaton has 60706 states and 77041 transitions. Word has length 81 [2021-12-06 21:10:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:26,413 INFO L470 AbstractCegarLoop]: Abstraction has 60706 states and 77041 transitions. [2021-12-06 21:10:26,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:26,413 INFO L276 IsEmpty]: Start isEmpty. Operand 60706 states and 77041 transitions. [2021-12-06 21:10:26,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 21:10:26,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:26,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:26,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 21:10:26,415 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:26,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:26,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1081869670, now seen corresponding path program 1 times [2021-12-06 21:10:26,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:26,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063827357] [2021-12-06 21:10:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:26,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:10:26,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:26,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063827357] [2021-12-06 21:10:26,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063827357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:26,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:26,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:10:26,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080769410] [2021-12-06 21:10:26,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:26,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:10:26,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:26,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:10:26,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:26,451 INFO L87 Difference]: Start difference. First operand 60706 states and 77041 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:29,908 INFO L93 Difference]: Finished difference Result 105182 states and 133186 transitions. [2021-12-06 21:10:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:10:29,909 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 21:10:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:29,953 INFO L225 Difference]: With dead ends: 105182 [2021-12-06 21:10:29,953 INFO L226 Difference]: Without dead ends: 46133 [2021-12-06 21:10:29,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:10:29,971 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4582 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4582 SdHoareTripleChecker+Valid, 2987 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:29,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4582 Valid, 2987 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:10:30,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46133 states. [2021-12-06 21:10:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46133 to 46133. [2021-12-06 21:10:33,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46133 states, 46131 states have (on average 1.2531486419110793) internal successors, (57809), 46132 states have internal predecessors, (57809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46133 states to 46133 states and 57809 transitions. [2021-12-06 21:10:33,379 INFO L78 Accepts]: Start accepts. Automaton has 46133 states and 57809 transitions. Word has length 81 [2021-12-06 21:10:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:33,380 INFO L470 AbstractCegarLoop]: Abstraction has 46133 states and 57809 transitions. [2021-12-06 21:10:33,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 46133 states and 57809 transitions. [2021-12-06 21:10:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 21:10:33,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:33,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:33,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 21:10:33,382 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:33,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:33,382 INFO L85 PathProgramCache]: Analyzing trace with hash -958775226, now seen corresponding path program 1 times [2021-12-06 21:10:33,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:33,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192967067] [2021-12-06 21:10:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:33,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 21:10:33,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:33,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192967067] [2021-12-06 21:10:33,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192967067] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:33,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:33,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:10:33,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829071883] [2021-12-06 21:10:33,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:33,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:10:33,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:33,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:10:33,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:33,418 INFO L87 Difference]: Start difference. First operand 46133 states and 57809 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:36,272 INFO L93 Difference]: Finished difference Result 81197 states and 101594 transitions. [2021-12-06 21:10:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:10:36,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 21:10:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:36,311 INFO L225 Difference]: With dead ends: 81197 [2021-12-06 21:10:36,311 INFO L226 Difference]: Without dead ends: 36640 [2021-12-06 21:10:36,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:10:36,332 INFO L933 BasicCegarLoop]: 1505 mSDtfsCounter, 4588 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4588 SdHoareTripleChecker+Valid, 2981 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:36,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4588 Valid, 2981 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:10:36,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36640 states. [2021-12-06 21:10:39,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36640 to 36640. [2021-12-06 21:10:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36640 states, 36638 states have (on average 1.246465418418036) internal successors, (45668), 36639 states have internal predecessors, (45668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36640 states to 36640 states and 45668 transitions. [2021-12-06 21:10:39,137 INFO L78 Accepts]: Start accepts. Automaton has 36640 states and 45668 transitions. Word has length 81 [2021-12-06 21:10:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:39,137 INFO L470 AbstractCegarLoop]: Abstraction has 36640 states and 45668 transitions. [2021-12-06 21:10:39,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 5 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 36640 states and 45668 transitions. [2021-12-06 21:10:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 21:10:39,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:39,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:39,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 21:10:39,139 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:10:39,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash 584192824, now seen corresponding path program 1 times [2021-12-06 21:10:39,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:39,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902284011] [2021-12-06 21:10:39,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:39,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:39,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:39,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902284011] [2021-12-06 21:10:39,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902284011] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:39,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126647542] [2021-12-06 21:10:39,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:39,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:39,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:39,248 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:39,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:10:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:39,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 21:10:39,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:12:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:12:23,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:12:27,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:12:27,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126647542] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:12:27,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:12:27,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 27, 29] total 60 [2021-12-06 21:12:27,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592530832] [2021-12-06 21:12:27,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:12:27,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 21:12:27,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:12:27,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 21:12:27,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2966, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 21:12:27,962 INFO L87 Difference]: Start difference. First operand 36640 states and 45668 transitions. Second operand has 60 states, 60 states have (on average 3.7666666666666666) internal successors, (226), 60 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:14:39,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:14:39,166 INFO L93 Difference]: Finished difference Result 179183 states and 219542 transitions. [2021-12-06 21:14:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 463 states. [2021-12-06 21:14:39,167 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.7666666666666666) internal successors, (226), 60 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 21:14:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:14:39,359 INFO L225 Difference]: With dead ends: 179183 [2021-12-06 21:14:39,359 INFO L226 Difference]: Without dead ends: 150584 [2021-12-06 21:14:39,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 518 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125945 ImplicationChecksByTransitivity, 108.2s TimeCoverageRelationStatistics Valid=33803, Invalid=236077, Unknown=0, NotChecked=0, Total=269880 [2021-12-06 21:14:39,405 INFO L933 BasicCegarLoop]: 1746 mSDtfsCounter, 16454 mSDsluCounter, 20786 mSDsCounter, 0 mSdLazyCounter, 6945 mSolverCounterSat, 1140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16454 SdHoareTripleChecker+Valid, 22532 SdHoareTripleChecker+Invalid, 8085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1140 IncrementalHoareTripleChecker+Valid, 6945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:14:39,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16454 Valid, 22532 Invalid, 8085 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1140 Valid, 6945 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-12-06 21:14:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150584 states. [2021-12-06 21:14:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150584 to 76529. [2021-12-06 21:14:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76529 states, 76527 states have (on average 1.236308753773178) internal successors, (94611), 76528 states have internal predecessors, (94611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:14:48,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76529 states to 76529 states and 94611 transitions. [2021-12-06 21:14:48,162 INFO L78 Accepts]: Start accepts. Automaton has 76529 states and 94611 transitions. Word has length 82 [2021-12-06 21:14:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:14:48,162 INFO L470 AbstractCegarLoop]: Abstraction has 76529 states and 94611 transitions. [2021-12-06 21:14:48,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.7666666666666666) internal successors, (226), 60 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:14:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 76529 states and 94611 transitions. [2021-12-06 21:14:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 21:14:48,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:14:48,164 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:14:48,184 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:14:48,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 21:14:48,365 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:14:48,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:14:48,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1441826097, now seen corresponding path program 1 times [2021-12-06 21:14:48,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:14:48,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258225807] [2021-12-06 21:14:48,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:14:48,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:14:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:14:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:14:48,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:14:48,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258225807] [2021-12-06 21:14:48,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258225807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:14:48,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:14:48,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 21:14:48,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43542635] [2021-12-06 21:14:48,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:14:48,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:14:48,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:14:48,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:14:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:14:48,411 INFO L87 Difference]: Start difference. First operand 76529 states and 94611 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:14:52,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:14:52,801 INFO L93 Difference]: Finished difference Result 109537 states and 134777 transitions. [2021-12-06 21:14:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:14:52,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-12-06 21:14:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:14:52,846 INFO L225 Difference]: With dead ends: 109537 [2021-12-06 21:14:52,846 INFO L226 Difference]: Without dead ends: 40697 [2021-12-06 21:14:52,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:14:52,867 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 25 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 3040 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:14:52,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 3040 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:14:52,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40697 states. [2021-12-06 21:14:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40697 to 40695. [2021-12-06 21:14:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40695 states, 40693 states have (on average 1.2119037672326936) internal successors, (49316), 40694 states have internal predecessors, (49316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:14:57,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40695 states to 40695 states and 49316 transitions. [2021-12-06 21:14:57,144 INFO L78 Accepts]: Start accepts. Automaton has 40695 states and 49316 transitions. Word has length 82 [2021-12-06 21:14:57,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:14:57,145 INFO L470 AbstractCegarLoop]: Abstraction has 40695 states and 49316 transitions. [2021-12-06 21:14:57,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:14:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 40695 states and 49316 transitions. [2021-12-06 21:14:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 21:14:57,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:14:57,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:14:57,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 21:14:57,146 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:14:57,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:14:57,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1782997605, now seen corresponding path program 1 times [2021-12-06 21:14:57,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:14:57,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695365692] [2021-12-06 21:14:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:14:57,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:14:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:14:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:14:57,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:14:57,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695365692] [2021-12-06 21:14:57,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695365692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:14:57,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271273690] [2021-12-06 21:14:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:14:57,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:14:57,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:14:57,401 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:14:57,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:14:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:14:57,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 21:14:57,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:15:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:15:02,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:15:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:15:05,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271273690] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:15:05,548 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:15:05,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 28, 25] total 60 [2021-12-06 21:15:05,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651182890] [2021-12-06 21:15:05,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:15:05,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-12-06 21:15:05,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:15:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-12-06 21:15:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=3157, Unknown=0, NotChecked=0, Total=3540 [2021-12-06 21:15:05,550 INFO L87 Difference]: Start difference. First operand 40695 states and 49316 transitions. Second operand has 60 states, 60 states have (on average 3.75) internal successors, (225), 60 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:16:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:16:04,199 INFO L93 Difference]: Finished difference Result 95498 states and 112505 transitions. [2021-12-06 21:16:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 305 states. [2021-12-06 21:16:04,199 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.75) internal successors, (225), 60 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-12-06 21:16:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:16:04,286 INFO L225 Difference]: With dead ends: 95498 [2021-12-06 21:16:04,286 INFO L226 Difference]: Without dead ends: 80366 [2021-12-06 21:16:04,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52036 ImplicationChecksByTransitivity, 44.8s TimeCoverageRelationStatistics Valid=14437, Invalid=108413, Unknown=0, NotChecked=0, Total=122850 [2021-12-06 21:16:04,308 INFO L933 BasicCegarLoop]: 1840 mSDtfsCounter, 24780 mSDsluCounter, 25979 mSDsCounter, 0 mSdLazyCounter, 5458 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24780 SdHoareTripleChecker+Valid, 27819 SdHoareTripleChecker+Invalid, 6071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 5458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:16:04,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24780 Valid, 27819 Invalid, 6071 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [613 Valid, 5458 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-06 21:16:04,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80366 states. [2021-12-06 21:16:09,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80366 to 37598. [2021-12-06 21:16:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37598 states, 37596 states have (on average 1.2129481859772315) internal successors, (45602), 37597 states have internal predecessors, (45602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:16:09,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37598 states to 37598 states and 45602 transitions. [2021-12-06 21:16:09,263 INFO L78 Accepts]: Start accepts. Automaton has 37598 states and 45602 transitions. Word has length 83 [2021-12-06 21:16:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:16:09,264 INFO L470 AbstractCegarLoop]: Abstraction has 37598 states and 45602 transitions. [2021-12-06 21:16:09,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.75) internal successors, (225), 60 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:16:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 37598 states and 45602 transitions. [2021-12-06 21:16:09,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 21:16:09,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:16:09,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:16:09,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:16:09,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 21:16:09,467 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:16:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:16:09,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1931323970, now seen corresponding path program 1 times [2021-12-06 21:16:09,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:16:09,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249188090] [2021-12-06 21:16:09,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:16:09,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:16:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:16:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:16:09,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:16:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249188090] [2021-12-06 21:16:09,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249188090] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:16:09,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904927822] [2021-12-06 21:16:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:16:09,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:16:09,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:16:09,707 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:16:09,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f18ca6fa-eb3a-4a81-8e18-d4554bebd816/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:16:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:16:09,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 21:16:09,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:16:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:16:15,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:16:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:16:24,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904927822] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:16:24,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:16:24,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 31, 29] total 70 [2021-12-06 21:16:24,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777170368] [2021-12-06 21:16:24,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:16:24,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 21:16:24,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:16:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 21:16:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=4376, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 21:16:24,564 INFO L87 Difference]: Start difference. First operand 37598 states and 45602 transitions. Second operand has 70 states, 70 states have (on average 3.257142857142857) internal successors, (228), 70 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)