./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.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_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/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_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/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_7efe1227-2dea-4539-8041-8b34267c0e9e/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 c07e007f9f3a362ec25382ccff24a1aeded702728f7c63228a63ffce5d34476e --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 19:33:00,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 19:33:00,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 19:33:00,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 19:33:00,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 19:33:00,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 19:33:00,805 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 19:33:00,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 19:33:00,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 19:33:00,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 19:33:00,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 19:33:00,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 19:33:00,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 19:33:00,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 19:33:00,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 19:33:00,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 19:33:00,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 19:33:00,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 19:33:00,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 19:33:00,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 19:33:00,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 19:33:00,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 19:33:00,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 19:33:00,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 19:33:00,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 19:33:00,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 19:33:00,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 19:33:00,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 19:33:00,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 19:33:00,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 19:33:00,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 19:33:00,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 19:33:00,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 19:33:00,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 19:33:00,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 19:33:00,847 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 19:33:00,848 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 19:33:00,848 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 19:33:00,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 19:33:00,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 19:33:00,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 19:33:00,851 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 19:33:00,873 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 19:33:00,874 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 19:33:00,874 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 19:33:00,874 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 19:33:00,875 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 19:33:00,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 19:33:00,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 19:33:00,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 19:33:00,876 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 19:33:00,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 19:33:00,877 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 19:33:00,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 19:33:00,877 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 19:33:00,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 19:33:00,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 19:33:00,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 19:33:00,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 19:33:00,878 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 19:33:00,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 19:33:00,878 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 19:33:00,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 19:33:00,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 19:33:00,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 19:33:00,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 19:33:00,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:33:00,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 19:33:00,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 19:33:00,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 19:33:00,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 19:33:00,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 19:33:00,880 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 19:33:00,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 19:33:00,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 19:33:00,881 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 19:33:00,881 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_7efe1227-2dea-4539-8041-8b34267c0e9e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c07e007f9f3a362ec25382ccff24a1aeded702728f7c63228a63ffce5d34476e [2021-12-06 19:33:01,081 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 19:33:01,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 19:33:01,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 19:33:01,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 19:33:01,098 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 19:33:01,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c [2021-12-06 19:33:01,142 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/data/e34d05cc4/f9a14add6d8247d3bf25de7380f9148e/FLAG4e4d7629b [2021-12-06 19:33:01,714 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 19:33:01,715 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c [2021-12-06 19:33:01,738 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/data/e34d05cc4/f9a14add6d8247d3bf25de7380f9148e/FLAG4e4d7629b [2021-12-06 19:33:02,174 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/data/e34d05cc4/f9a14add6d8247d3bf25de7380f9148e [2021-12-06 19:33:02,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 19:33:02,178 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 19:33:02,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 19:33:02,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 19:33:02,182 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 19:33:02,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:33:02" (1/1) ... [2021-12-06 19:33:02,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@182acc34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:02, skipping insertion in model container [2021-12-06 19:33:02,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 07:33:02" (1/1) ... [2021-12-06 19:33:02,188 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 19:33:02,279 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 19:33:02,517 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_7efe1227-2dea-4539-8041-8b34267c0e9e/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[11640,11653] [2021-12-06 19:33:02,537 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_7efe1227-2dea-4539-8041-8b34267c0e9e/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[12482,12495] [2021-12-06 19:33:03,085 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:33:03,092 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 19:33:03,114 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_7efe1227-2dea-4539-8041-8b34267c0e9e/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[11640,11653] [2021-12-06 19:33:03,116 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_7efe1227-2dea-4539-8041-8b34267c0e9e/sv-benchmarks/c/combinations/pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c[12482,12495] [2021-12-06 19:33:03,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 19:33:03,495 INFO L208 MainTranslator]: Completed translation [2021-12-06 19:33:03,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03 WrapperNode [2021-12-06 19:33:03,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 19:33:03,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 19:33:03,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 19:33:03,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 19:33:03,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (1/1) ... [2021-12-06 19:33:03,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (1/1) ... [2021-12-06 19:33:03,777 INFO L137 Inliner]: procedures = 36, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5090 [2021-12-06 19:33:03,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 19:33:03,778 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 19:33:03,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 19:33:03,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 19:33:03,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (1/1) ... [2021-12-06 19:33:03,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (1/1) ... [2021-12-06 19:33:03,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (1/1) ... [2021-12-06 19:33:03,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (1/1) ... [2021-12-06 19:33:03,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (1/1) ... [2021-12-06 19:33:04,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (1/1) ... [2021-12-06 19:33:04,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (1/1) ... [2021-12-06 19:33:04,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 19:33:04,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 19:33:04,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 19:33:04,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 19:33:04,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (1/1) ... [2021-12-06 19:33:04,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 19:33:04,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:33:04,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 19:33:04,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 19:33:04,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 19:33:04,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 19:33:04,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 19:33:04,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 19:33:04,185 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 19:33:04,186 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 19:33:07,076 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 19:33:07,094 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 19:33:07,094 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 19:33:07,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:33:07 BoogieIcfgContainer [2021-12-06 19:33:07,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 19:33:07,099 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 19:33:07,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 19:33:07,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 19:33:07,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 07:33:02" (1/3) ... [2021-12-06 19:33:07,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9b201e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:33:07, skipping insertion in model container [2021-12-06 19:33:07,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 07:33:03" (2/3) ... [2021-12-06 19:33:07,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b9b201e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 07:33:07, skipping insertion in model container [2021-12-06 19:33:07,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 07:33:07" (3/3) ... [2021-12-06 19:33:07,103 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.BOUNDED-10.pals+Problem12_label07.c [2021-12-06 19:33:07,108 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 19:33:07,108 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 19:33:07,150 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 19:33:07,157 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 19:33:07,157 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 19:33:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 0 states have call successors, (0), 0 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 19:33:07,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 19:33:07,207 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:07,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:07,208 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:07,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:07,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2089036915, now seen corresponding path program 1 times [2021-12-06 19:33:07,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:07,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667532360] [2021-12-06 19:33:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:07,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:07,348 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 19:33:07,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:07,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667532360] [2021-12-06 19:33:07,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667532360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:07,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:07,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:07,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112071463] [2021-12-06 19:33:07,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:07,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:07,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:07,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:07,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:07,379 INFO L87 Difference]: Start difference. First operand has 909 states, 906 states have (on average 1.900662251655629) internal successors, (1722), 908 states have internal predecessors, (1722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 19:33:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:09,969 INFO L93 Difference]: Finished difference Result 2536 states and 4876 transitions. [2021-12-06 19:33:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-12-06 19:33:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:09,990 INFO L225 Difference]: With dead ends: 2536 [2021-12-06 19:33:09,991 INFO L226 Difference]: Without dead ends: 1594 [2021-12-06 19:33:09,995 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 19:33:09,998 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 981 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:09,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [981 Valid, 636 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 19:33:10,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-12-06 19:33:10,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2021-12-06 19:33:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 1.64321608040201) internal successors, (2616), 1593 states have internal predecessors, (2616), 0 states have call successors, (0), 0 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 19:33:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2616 transitions. [2021-12-06 19:33:10,082 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2616 transitions. Word has length 7 [2021-12-06 19:33:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:10,082 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2616 transitions. [2021-12-06 19:33:10,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 19:33:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2616 transitions. [2021-12-06 19:33:10,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 19:33:10,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:10,084 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] [2021-12-06 19:33:10,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 19:33:10,084 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:10,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:10,085 INFO L85 PathProgramCache]: Analyzing trace with hash -950839655, now seen corresponding path program 1 times [2021-12-06 19:33:10,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:10,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461069442] [2021-12-06 19:33:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:10,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:10,145 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 19:33:10,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:10,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461069442] [2021-12-06 19:33:10,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461069442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:10,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:10,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:33:10,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270543199] [2021-12-06 19:33:10,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:10,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:33:10,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:33:10,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:33:10,150 INFO L87 Difference]: Start difference. First operand 1594 states and 2616 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 19:33:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:10,211 INFO L93 Difference]: Finished difference Result 1650 states and 2702 transitions. [2021-12-06 19:33:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 19:33:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-06 19:33:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:10,219 INFO L225 Difference]: With dead ends: 1650 [2021-12-06 19:33:10,219 INFO L226 Difference]: Without dead ends: 1594 [2021-12-06 19:33:10,220 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 19:33:10,222 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 3 mSDsluCounter, 4727 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6314 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:10,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6314 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2021-12-06 19:33:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1594. [2021-12-06 19:33:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1592 states have (on average 1.6237437185929648) internal successors, (2585), 1593 states have internal predecessors, (2585), 0 states have call successors, (0), 0 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 19:33:10,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2585 transitions. [2021-12-06 19:33:10,254 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2585 transitions. Word has length 34 [2021-12-06 19:33:10,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:10,254 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 2585 transitions. [2021-12-06 19:33:10,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 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 19:33:10,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2585 transitions. [2021-12-06 19:33:10,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:33:10,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:10,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:10,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 19:33:10,258 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:10,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:10,259 INFO L85 PathProgramCache]: Analyzing trace with hash -695028240, now seen corresponding path program 1 times [2021-12-06 19:33:10,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:10,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006553911] [2021-12-06 19:33:10,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:10,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:10,368 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 19:33:10,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006553911] [2021-12-06 19:33:10,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006553911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:10,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:10,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:33:10,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208793269] [2021-12-06 19:33:10,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:10,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:10,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:10,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:10,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:10,371 INFO L87 Difference]: Start difference. First operand 1594 states and 2585 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:10,408 INFO L93 Difference]: Finished difference Result 1692 states and 2739 transitions. [2021-12-06 19:33:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:10,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 19:33:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:10,419 INFO L225 Difference]: With dead ends: 1692 [2021-12-06 19:33:10,419 INFO L226 Difference]: Without dead ends: 1640 [2021-12-06 19:33:10,420 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 19:33:10,422 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 1511 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1706 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 19:33:10,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1706 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-12-06 19:33:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1638. [2021-12-06 19:33:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1636 states have (on average 1.6228606356968216) internal successors, (2655), 1637 states have internal predecessors, (2655), 0 states have call successors, (0), 0 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 19:33:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 2655 transitions. [2021-12-06 19:33:10,467 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 2655 transitions. Word has length 64 [2021-12-06 19:33:10,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:10,467 INFO L470 AbstractCegarLoop]: Abstraction has 1638 states and 2655 transitions. [2021-12-06 19:33:10,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:10,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 2655 transitions. [2021-12-06 19:33:10,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:33:10,469 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:10,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:10,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 19:33:10,470 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:10,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1440610970, now seen corresponding path program 1 times [2021-12-06 19:33:10,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:10,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230783259] [2021-12-06 19:33:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:10,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:10,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:10,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230783259] [2021-12-06 19:33:10,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230783259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:10,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:10,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:33:10,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430475263] [2021-12-06 19:33:10,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:10,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:10,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:10,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:10,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:10,549 INFO L87 Difference]: Start difference. First operand 1638 states and 2655 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:10,584 INFO L93 Difference]: Finished difference Result 1818 states and 2939 transitions. [2021-12-06 19:33:10,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:10,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 19:33:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:10,595 INFO L225 Difference]: With dead ends: 1818 [2021-12-06 19:33:10,595 INFO L226 Difference]: Without dead ends: 1722 [2021-12-06 19:33:10,596 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 19:33:10,597 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 1507 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1705 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 19:33:10,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1705 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:10,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2021-12-06 19:33:10,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1720. [2021-12-06 19:33:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1718 states have (on average 1.620488940628638) internal successors, (2784), 1719 states have internal predecessors, (2784), 0 states have call successors, (0), 0 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 19:33:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 2784 transitions. [2021-12-06 19:33:10,646 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 2784 transitions. Word has length 64 [2021-12-06 19:33:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:10,646 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 2784 transitions. [2021-12-06 19:33:10,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:10,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 2784 transitions. [2021-12-06 19:33:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:33:10,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:10,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:10,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 19:33:10,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:10,650 INFO L85 PathProgramCache]: Analyzing trace with hash 914325468, now seen corresponding path program 1 times [2021-12-06 19:33:10,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:10,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754981661] [2021-12-06 19:33:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:10,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:10,710 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 19:33:10,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:10,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754981661] [2021-12-06 19:33:10,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754981661] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:10,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:10,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:33:10,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995541217] [2021-12-06 19:33:10,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:10,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:10,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:10,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:10,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:10,712 INFO L87 Difference]: Start difference. First operand 1720 states and 2784 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:10,743 INFO L93 Difference]: Finished difference Result 2052 states and 3306 transitions. [2021-12-06 19:33:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 19:33:10,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:10,751 INFO L225 Difference]: With dead ends: 2052 [2021-12-06 19:33:10,752 INFO L226 Difference]: Without dead ends: 1874 [2021-12-06 19:33:10,753 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 19:33:10,753 INFO L933 BasicCegarLoop]: 1616 mSDtfsCounter, 1503 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 1704 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 19:33:10,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1503 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-12-06 19:33:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1872. [2021-12-06 19:33:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1872 states, 1870 states have (on average 1.6149732620320856) internal successors, (3020), 1871 states have internal predecessors, (3020), 0 states have call successors, (0), 0 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 19:33:10,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3020 transitions. [2021-12-06 19:33:10,794 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3020 transitions. Word has length 64 [2021-12-06 19:33:10,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:10,795 INFO L470 AbstractCegarLoop]: Abstraction has 1872 states and 3020 transitions. [2021-12-06 19:33:10,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:10,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3020 transitions. [2021-12-06 19:33:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:33:10,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:10,796 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:10,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 19:33:10,796 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:10,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:10,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1701027568, now seen corresponding path program 1 times [2021-12-06 19:33:10,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:10,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194651726] [2021-12-06 19:33:10,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:10,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:10,851 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 19:33:10,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:10,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194651726] [2021-12-06 19:33:10,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194651726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:10,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:10,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:33:10,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265330350] [2021-12-06 19:33:10,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:10,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:10,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:10,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:10,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:10,853 INFO L87 Difference]: Start difference. First operand 1872 states and 3020 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:10,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:10,885 INFO L93 Difference]: Finished difference Result 2484 states and 3974 transitions. [2021-12-06 19:33:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:10,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 19:33:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:10,895 INFO L225 Difference]: With dead ends: 2484 [2021-12-06 19:33:10,895 INFO L226 Difference]: Without dead ends: 2154 [2021-12-06 19:33:10,896 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 19:33:10,897 INFO L933 BasicCegarLoop]: 1611 mSDtfsCounter, 1499 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1499 SdHoareTripleChecker+Valid, 1703 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 19:33:10,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1499 Valid, 1703 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:10,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-12-06 19:33:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2021-12-06 19:33:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2150 states have (on average 1.6037209302325581) internal successors, (3448), 2151 states have internal predecessors, (3448), 0 states have call successors, (0), 0 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 19:33:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3448 transitions. [2021-12-06 19:33:10,942 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3448 transitions. Word has length 64 [2021-12-06 19:33:10,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:10,943 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3448 transitions. [2021-12-06 19:33:10,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:10,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3448 transitions. [2021-12-06 19:33:10,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:33:10,943 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:10,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:10,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 19:33:10,944 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:10,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:10,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1105068988, now seen corresponding path program 1 times [2021-12-06 19:33:10,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:10,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294256083] [2021-12-06 19:33:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:10,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:10,979 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 19:33:10,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:10,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294256083] [2021-12-06 19:33:10,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294256083] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:10,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:10,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:33:10,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035875037] [2021-12-06 19:33:10,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:10,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:10,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:10,981 INFO L87 Difference]: Start difference. First operand 2152 states and 3448 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:11,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:11,025 INFO L93 Difference]: Finished difference Result 3276 states and 5178 transitions. [2021-12-06 19:33:11,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:11,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 19:33:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:11,037 INFO L225 Difference]: With dead ends: 3276 [2021-12-06 19:33:11,037 INFO L226 Difference]: Without dead ends: 2666 [2021-12-06 19:33:11,039 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 19:33:11,039 INFO L933 BasicCegarLoop]: 1606 mSDtfsCounter, 1495 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 1702 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 19:33:11,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1495 Valid, 1702 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-12-06 19:33:11,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2664. [2021-12-06 19:33:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2664 states, 2662 states have (on average 1.583771600300526) internal successors, (4216), 2663 states have internal predecessors, (4216), 0 states have call successors, (0), 0 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 19:33:11,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2664 states to 2664 states and 4216 transitions. [2021-12-06 19:33:11,099 INFO L78 Accepts]: Start accepts. Automaton has 2664 states and 4216 transitions. Word has length 64 [2021-12-06 19:33:11,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:11,099 INFO L470 AbstractCegarLoop]: Abstraction has 2664 states and 4216 transitions. [2021-12-06 19:33:11,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:11,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2664 states and 4216 transitions. [2021-12-06 19:33:11,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 19:33:11,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:11,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:11,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 19:33:11,101 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:11,101 INFO L85 PathProgramCache]: Analyzing trace with hash 112916410, now seen corresponding path program 1 times [2021-12-06 19:33:11,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:11,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69268200] [2021-12-06 19:33:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:11,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:11,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:11,151 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 19:33:11,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:11,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69268200] [2021-12-06 19:33:11,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69268200] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:11,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:11,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:33:11,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353614087] [2021-12-06 19:33:11,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:11,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:33:11,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:11,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:33:11,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:33:11,153 INFO L87 Difference]: Start difference. First operand 2664 states and 4216 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:11,502 INFO L93 Difference]: Finished difference Result 13884 states and 21346 transitions. [2021-12-06 19:33:11,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 19:33:11,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-06 19:33:11,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:11,559 INFO L225 Difference]: With dead ends: 13884 [2021-12-06 19:33:11,559 INFO L226 Difference]: Without dead ends: 12762 [2021-12-06 19:33:11,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-06 19:33:11,564 INFO L933 BasicCegarLoop]: 1552 mSDtfsCounter, 8512 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8512 SdHoareTripleChecker+Valid, 2392 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:11,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8512 Valid, 2392 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:33:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12762 states. [2021-12-06 19:33:11,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12762 to 3784. [2021-12-06 19:33:11,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3782 states have (on average 1.550502379693284) internal successors, (5864), 3783 states have internal predecessors, (5864), 0 states have call successors, (0), 0 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 19:33:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5864 transitions. [2021-12-06 19:33:11,764 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5864 transitions. Word has length 64 [2021-12-06 19:33:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:11,765 INFO L470 AbstractCegarLoop]: Abstraction has 3784 states and 5864 transitions. [2021-12-06 19:33:11,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5864 transitions. [2021-12-06 19:33:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 19:33:11,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:11,765 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:11,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 19:33:11,766 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:11,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:11,766 INFO L85 PathProgramCache]: Analyzing trace with hash -277208054, now seen corresponding path program 1 times [2021-12-06 19:33:11,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:11,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197337829] [2021-12-06 19:33:11,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:11,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:11,798 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 19:33:11,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:11,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197337829] [2021-12-06 19:33:11,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197337829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:11,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:11,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:33:11,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161554524] [2021-12-06 19:33:11,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:11,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:11,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:11,800 INFO L87 Difference]: Start difference. First operand 3784 states and 5864 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:11,908 INFO L93 Difference]: Finished difference Result 7070 states and 10780 transitions. [2021-12-06 19:33:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:11,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 19:33:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:11,917 INFO L225 Difference]: With dead ends: 7070 [2021-12-06 19:33:11,917 INFO L226 Difference]: Without dead ends: 4828 [2021-12-06 19:33:11,920 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 19:33:11,921 INFO L933 BasicCegarLoop]: 1588 mSDtfsCounter, 1487 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1487 SdHoareTripleChecker+Valid, 1665 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 19:33:11,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1487 Valid, 1665 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-12-06 19:33:12,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2021-12-06 19:33:12,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.5277777777777777) internal successors, (7370), 4825 states have internal predecessors, (7370), 0 states have call successors, (0), 0 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 19:33:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7370 transitions. [2021-12-06 19:33:12,060 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7370 transitions. Word has length 66 [2021-12-06 19:33:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:12,060 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7370 transitions. [2021-12-06 19:33:12,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7370 transitions. [2021-12-06 19:33:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 19:33:12,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:12,061 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:12,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 19:33:12,061 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:12,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:12,061 INFO L85 PathProgramCache]: Analyzing trace with hash -210714542, now seen corresponding path program 1 times [2021-12-06 19:33:12,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:12,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131547423] [2021-12-06 19:33:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:12,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:12,184 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 19:33:12,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:12,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131547423] [2021-12-06 19:33:12,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131547423] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:12,184 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:12,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:33:12,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935655525] [2021-12-06 19:33:12,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:12,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:33:12,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:12,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:33:12,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:33:12,186 INFO L87 Difference]: Start difference. First operand 4826 states and 7370 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:12,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:12,456 INFO L93 Difference]: Finished difference Result 8110 states and 12236 transitions. [2021-12-06 19:33:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:33:12,457 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 19:33:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:12,467 INFO L225 Difference]: With dead ends: 8110 [2021-12-06 19:33:12,468 INFO L226 Difference]: Without dead ends: 4828 [2021-12-06 19:33:12,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-06 19:33:12,474 INFO L933 BasicCegarLoop]: 1551 mSDtfsCounter, 6144 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6144 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:12,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6144 Valid, 1867 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:12,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4828 states. [2021-12-06 19:33:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4828 to 4826. [2021-12-06 19:33:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.5178275290215588) internal successors, (7322), 4825 states have internal predecessors, (7322), 0 states have call successors, (0), 0 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 19:33:12,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7322 transitions. [2021-12-06 19:33:12,650 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7322 transitions. Word has length 66 [2021-12-06 19:33:12,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:12,650 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7322 transitions. [2021-12-06 19:33:12,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7322 transitions. [2021-12-06 19:33:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 19:33:12,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:12,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:12,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 19:33:12,652 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:12,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:12,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1643060746, now seen corresponding path program 1 times [2021-12-06 19:33:12,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:12,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893308677] [2021-12-06 19:33:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:12,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:12,705 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 19:33:12,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:12,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893308677] [2021-12-06 19:33:12,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893308677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:12,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:12,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:33:12,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103816690] [2021-12-06 19:33:12,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:12,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:33:12,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:12,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:33:12,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:33:12,707 INFO L87 Difference]: Start difference. First operand 4826 states and 7322 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:12,888 INFO L93 Difference]: Finished difference Result 8108 states and 12139 transitions. [2021-12-06 19:33:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:33:12,888 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 19:33:12,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:12,895 INFO L225 Difference]: With dead ends: 8108 [2021-12-06 19:33:12,895 INFO L226 Difference]: Without dead ends: 4826 [2021-12-06 19:33:12,899 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 19:33:12,900 INFO L933 BasicCegarLoop]: 1519 mSDtfsCounter, 4627 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4627 SdHoareTripleChecker+Valid, 3022 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:12,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4627 Valid, 3022 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:12,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-12-06 19:33:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-12-06 19:33:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.50787728026534) internal successors, (7274), 4825 states have internal predecessors, (7274), 0 states have call successors, (0), 0 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 19:33:13,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7274 transitions. [2021-12-06 19:33:13,068 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7274 transitions. Word has length 67 [2021-12-06 19:33:13,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:13,068 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7274 transitions. [2021-12-06 19:33:13,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:13,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7274 transitions. [2021-12-06 19:33:13,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 19:33:13,069 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:13,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:13,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 19:33:13,070 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:13,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:13,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1372042872, now seen corresponding path program 1 times [2021-12-06 19:33:13,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:13,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372518916] [2021-12-06 19:33:13,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:13,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:13,126 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 19:33:13,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:13,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372518916] [2021-12-06 19:33:13,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372518916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:13,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:13,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:33:13,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554746948] [2021-12-06 19:33:13,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:13,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 19:33:13,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:13,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 19:33:13,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 19:33:13,129 INFO L87 Difference]: Start difference. First operand 4826 states and 7274 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:13,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:13,317 INFO L93 Difference]: Finished difference Result 8108 states and 12043 transitions. [2021-12-06 19:33:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 19:33:13,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 19:33:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:13,326 INFO L225 Difference]: With dead ends: 8108 [2021-12-06 19:33:13,326 INFO L226 Difference]: Without dead ends: 4826 [2021-12-06 19:33:13,331 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 19:33:13,332 INFO L933 BasicCegarLoop]: 1521 mSDtfsCounter, 4660 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4660 SdHoareTripleChecker+Valid, 3023 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:13,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4660 Valid, 3023 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:13,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4826 states. [2021-12-06 19:33:13,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4826 to 4826. [2021-12-06 19:33:13,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4826 states, 4824 states have (on average 1.497927031509121) internal successors, (7226), 4825 states have internal predecessors, (7226), 0 states have call successors, (0), 0 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 19:33:13,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4826 states to 4826 states and 7226 transitions. [2021-12-06 19:33:13,462 INFO L78 Accepts]: Start accepts. Automaton has 4826 states and 7226 transitions. Word has length 67 [2021-12-06 19:33:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:13,463 INFO L470 AbstractCegarLoop]: Abstraction has 4826 states and 7226 transitions. [2021-12-06 19:33:13,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4826 states and 7226 transitions. [2021-12-06 19:33:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 19:33:13,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:13,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:13,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 19:33:13,464 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash 316900870, now seen corresponding path program 1 times [2021-12-06 19:33:13,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:13,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169152972] [2021-12-06 19:33:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:13,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:13,509 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 19:33:13,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:13,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169152972] [2021-12-06 19:33:13,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169152972] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:13,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:13,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 19:33:13,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99778995] [2021-12-06 19:33:13,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:13,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 19:33:13,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:13,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 19:33:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:33:13,510 INFO L87 Difference]: Start difference. First operand 4826 states and 7226 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:13,749 INFO L93 Difference]: Finished difference Result 7669 states and 11200 transitions. [2021-12-06 19:33:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:33:13,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-12-06 19:33:13,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:13,758 INFO L225 Difference]: With dead ends: 7669 [2021-12-06 19:33:13,758 INFO L226 Difference]: Without dead ends: 7667 [2021-12-06 19:33:13,760 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 19:33:13,760 INFO L933 BasicCegarLoop]: 1581 mSDtfsCounter, 211 mSDsluCounter, 4661 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 6242 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 19:33:13,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 6242 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:13,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7667 states. [2021-12-06 19:33:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7667 to 5018. [2021-12-06 19:33:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5018 states, 5016 states have (on average 1.4756778309409888) internal successors, (7402), 5017 states have internal predecessors, (7402), 0 states have call successors, (0), 0 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 19:33:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5018 states to 5018 states and 7402 transitions. [2021-12-06 19:33:13,944 INFO L78 Accepts]: Start accepts. Automaton has 5018 states and 7402 transitions. Word has length 67 [2021-12-06 19:33:13,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:13,945 INFO L470 AbstractCegarLoop]: Abstraction has 5018 states and 7402 transitions. [2021-12-06 19:33:13,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 5018 states and 7402 transitions. [2021-12-06 19:33:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 19:33:13,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:13,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:13,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 19:33:13,946 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:13,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:13,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2081134109, now seen corresponding path program 1 times [2021-12-06 19:33:13,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:13,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025907511] [2021-12-06 19:33:13,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:13,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:13,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:13,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025907511] [2021-12-06 19:33:13,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025907511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:13,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:13,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:33:13,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824071245] [2021-12-06 19:33:13,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:13,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:13,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:13,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:13,978 INFO L87 Difference]: Start difference. First operand 5018 states and 7402 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:16,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:16,363 INFO L93 Difference]: Finished difference Result 8024 states and 12329 transitions. [2021-12-06 19:33:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:16,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-12-06 19:33:16,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:16,371 INFO L225 Difference]: With dead ends: 8024 [2021-12-06 19:33:16,371 INFO L226 Difference]: Without dead ends: 6520 [2021-12-06 19:33:16,374 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 19:33:16,374 INFO L933 BasicCegarLoop]: 1266 mSDtfsCounter, 762 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:16,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 1391 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:33:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6520 states. [2021-12-06 19:33:16,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6520 to 6520. [2021-12-06 19:33:16,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6520 states, 6518 states have (on average 1.4664007364222154) internal successors, (9558), 6519 states have internal predecessors, (9558), 0 states have call successors, (0), 0 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 19:33:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6520 states to 6520 states and 9558 transitions. [2021-12-06 19:33:16,567 INFO L78 Accepts]: Start accepts. Automaton has 6520 states and 9558 transitions. Word has length 78 [2021-12-06 19:33:16,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:16,567 INFO L470 AbstractCegarLoop]: Abstraction has 6520 states and 9558 transitions. [2021-12-06 19:33:16,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:16,567 INFO L276 IsEmpty]: Start isEmpty. Operand 6520 states and 9558 transitions. [2021-12-06 19:33:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 19:33:16,568 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:16,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:16,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 19:33:16,568 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:16,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1968929968, now seen corresponding path program 1 times [2021-12-06 19:33:16,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:16,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675474410] [2021-12-06 19:33:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:16,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:16,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:16,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675474410] [2021-12-06 19:33:16,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675474410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:16,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:16,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:16,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234855756] [2021-12-06 19:33:16,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:16,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:16,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:16,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:16,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:16,604 INFO L87 Difference]: Start difference. First operand 6520 states and 9558 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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 19:33:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:18,998 INFO L93 Difference]: Finished difference Result 11028 states and 16641 transitions. [2021-12-06 19:33:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:18,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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 19:33:18,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:19,004 INFO L225 Difference]: With dead ends: 11028 [2021-12-06 19:33:19,004 INFO L226 Difference]: Without dead ends: 8022 [2021-12-06 19:33:19,006 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 19:33:19,006 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 841 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 962 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 3267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 962 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:19,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 272 Invalid, 3267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [962 Valid, 2305 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:33:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8022 states. [2021-12-06 19:33:19,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8022 to 8022. [2021-12-06 19:33:19,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8022 states, 8020 states have (on average 1.488279301745636) internal successors, (11936), 8021 states have internal predecessors, (11936), 0 states have call successors, (0), 0 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 19:33:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8022 states to 8022 states and 11936 transitions. [2021-12-06 19:33:19,199 INFO L78 Accepts]: Start accepts. Automaton has 8022 states and 11936 transitions. Word has length 81 [2021-12-06 19:33:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:19,199 INFO L470 AbstractCegarLoop]: Abstraction has 8022 states and 11936 transitions. [2021-12-06 19:33:19,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 2 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 19:33:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 8022 states and 11936 transitions. [2021-12-06 19:33:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 19:33:19,200 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:19,200 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:19,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 19:33:19,201 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:19,201 INFO L85 PathProgramCache]: Analyzing trace with hash -124879277, now seen corresponding path program 1 times [2021-12-06 19:33:19,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:19,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596691371] [2021-12-06 19:33:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:19,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:19,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:19,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596691371] [2021-12-06 19:33:19,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596691371] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:19,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:19,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:19,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434217242] [2021-12-06 19:33:19,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:19,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:19,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:19,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:19,234 INFO L87 Difference]: Start difference. First operand 8022 states and 11936 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 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 19:33:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:21,463 INFO L93 Difference]: Finished difference Result 17036 states and 25931 transitions. [2021-12-06 19:33:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 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 19:33:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:21,473 INFO L225 Difference]: With dead ends: 17036 [2021-12-06 19:33:21,473 INFO L226 Difference]: Without dead ends: 12528 [2021-12-06 19:33:21,477 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 19:33:21,478 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 890 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:21,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 564 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 19:33:21,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12528 states. [2021-12-06 19:33:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12528 to 12528. [2021-12-06 19:33:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12528 states, 12526 states have (on average 1.3912661663739423) internal successors, (17427), 12527 states have internal predecessors, (17427), 0 states have call successors, (0), 0 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 19:33:21,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12528 states to 12528 states and 17427 transitions. [2021-12-06 19:33:21,711 INFO L78 Accepts]: Start accepts. Automaton has 12528 states and 17427 transitions. Word has length 82 [2021-12-06 19:33:21,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:21,711 INFO L470 AbstractCegarLoop]: Abstraction has 12528 states and 17427 transitions. [2021-12-06 19:33:21,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 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 19:33:21,711 INFO L276 IsEmpty]: Start isEmpty. Operand 12528 states and 17427 transitions. [2021-12-06 19:33:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 19:33:21,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:21,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:21,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 19:33:21,713 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:21,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:21,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2018351964, now seen corresponding path program 1 times [2021-12-06 19:33:21,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:21,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660205421] [2021-12-06 19:33:21,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:21,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:21,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:21,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660205421] [2021-12-06 19:33:21,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660205421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:21,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:21,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 19:33:21,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055417885] [2021-12-06 19:33:21,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:21,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:33:21,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:21,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:33:21,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:33:21,747 INFO L87 Difference]: Start difference. First operand 12528 states and 17427 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:24,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:24,213 INFO L93 Difference]: Finished difference Result 30556 states and 42405 transitions. [2021-12-06 19:33:24,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:33:24,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-12-06 19:33:24,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:24,228 INFO L225 Difference]: With dead ends: 30556 [2021-12-06 19:33:24,228 INFO L226 Difference]: Without dead ends: 21542 [2021-12-06 19:33:24,236 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 19:33:24,236 INFO L933 BasicCegarLoop]: 462 mSDtfsCounter, 1026 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:24,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1026 Valid, 469 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 19:33:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21542 states. [2021-12-06 19:33:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21542 to 19287. [2021-12-06 19:33:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19287 states, 19285 states have (on average 1.3276639875550946) internal successors, (25604), 19286 states have internal predecessors, (25604), 0 states have call successors, (0), 0 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 19:33:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19287 states to 19287 states and 25604 transitions. [2021-12-06 19:33:24,549 INFO L78 Accepts]: Start accepts. Automaton has 19287 states and 25604 transitions. Word has length 88 [2021-12-06 19:33:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:24,550 INFO L470 AbstractCegarLoop]: Abstraction has 19287 states and 25604 transitions. [2021-12-06 19:33:24,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 19:33:24,550 INFO L276 IsEmpty]: Start isEmpty. Operand 19287 states and 25604 transitions. [2021-12-06 19:33:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 19:33:24,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:24,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:33:24,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 19:33:24,552 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:24,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:24,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1023837586, now seen corresponding path program 1 times [2021-12-06 19:33:24,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:24,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097175138] [2021-12-06 19:33:24,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:24,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:24,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:24,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097175138] [2021-12-06 19:33:24,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097175138] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:24,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:24,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:33:24,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330620045] [2021-12-06 19:33:24,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:24,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 19:33:24,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:24,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 19:33:24,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 19:33:24,601 INFO L87 Difference]: Start difference. First operand 19287 states and 25604 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 19:33:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:28,122 INFO L93 Difference]: Finished difference Result 35811 states and 47063 transitions. [2021-12-06 19:33:28,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 19:33:28,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-06 19:33:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:28,135 INFO L225 Difference]: With dead ends: 35811 [2021-12-06 19:33:28,135 INFO L226 Difference]: Without dead ends: 20038 [2021-12-06 19:33:28,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 19:33:28,146 INFO L933 BasicCegarLoop]: 388 mSDtfsCounter, 2397 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4907 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2397 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 5435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 4907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:28,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2397 Valid, 405 Invalid, 5435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 4907 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-06 19:33:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20038 states. [2021-12-06 19:33:28,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20038 to 20038. [2021-12-06 19:33:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20038 states, 20036 states have (on average 1.2917248951886604) internal successors, (25881), 20037 states have internal predecessors, (25881), 0 states have call successors, (0), 0 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 19:33:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20038 states to 20038 states and 25881 transitions. [2021-12-06 19:33:28,465 INFO L78 Accepts]: Start accepts. Automaton has 20038 states and 25881 transitions. Word has length 93 [2021-12-06 19:33:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:28,466 INFO L470 AbstractCegarLoop]: Abstraction has 20038 states and 25881 transitions. [2021-12-06 19:33:28,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 19:33:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 20038 states and 25881 transitions. [2021-12-06 19:33:28,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:33:28,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:28,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:28,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 19:33:28,469 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:28,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1065285143, now seen corresponding path program 1 times [2021-12-06 19:33:28,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:28,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748405843] [2021-12-06 19:33:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:28,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 19:33:28,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:28,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748405843] [2021-12-06 19:33:28,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748405843] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:28,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:28,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:33:28,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579386700] [2021-12-06 19:33:28,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:28,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:33:28,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:28,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:33:28,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:33:28,519 INFO L87 Difference]: Start difference. First operand 20038 states and 25881 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 19:33:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:29,440 INFO L93 Difference]: Finished difference Result 38114 states and 51311 transitions. [2021-12-06 19:33:29,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:33:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 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 95 [2021-12-06 19:33:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:29,468 INFO L225 Difference]: With dead ends: 38114 [2021-12-06 19:33:29,468 INFO L226 Difference]: Without dead ends: 34640 [2021-12-06 19:33:29,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:33:29,475 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6581 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6581 SdHoareTripleChecker+Valid, 3534 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:29,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6581 Valid, 3534 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:29,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34640 states. [2021-12-06 19:33:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34640 to 23510. [2021-12-06 19:33:30,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23510 states, 23508 states have (on average 1.307172026544155) internal successors, (30729), 23509 states have internal predecessors, (30729), 0 states have call successors, (0), 0 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 19:33:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23510 states to 23510 states and 30729 transitions. [2021-12-06 19:33:30,058 INFO L78 Accepts]: Start accepts. Automaton has 23510 states and 30729 transitions. Word has length 95 [2021-12-06 19:33:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:30,059 INFO L470 AbstractCegarLoop]: Abstraction has 23510 states and 30729 transitions. [2021-12-06 19:33:30,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 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 19:33:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 23510 states and 30729 transitions. [2021-12-06 19:33:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:33:30,061 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:30,061 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:30,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 19:33:30,062 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:30,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:30,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1460899337, now seen corresponding path program 1 times [2021-12-06 19:33:30,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:30,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667041167] [2021-12-06 19:33:30,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:30,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 19:33:30,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:30,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667041167] [2021-12-06 19:33:30,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667041167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:30,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:30,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:33:30,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521109471] [2021-12-06 19:33:30,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:30,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:33:30,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:30,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:33:30,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:33:30,110 INFO L87 Difference]: Start difference. First operand 23510 states and 30729 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 19:33:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:31,241 INFO L93 Difference]: Finished difference Result 41586 states and 56159 transitions. [2021-12-06 19:33:31,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:33:31,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 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 95 [2021-12-06 19:33:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:31,278 INFO L225 Difference]: With dead ends: 41586 [2021-12-06 19:33:31,278 INFO L226 Difference]: Without dead ends: 38112 [2021-12-06 19:33:31,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:33:31,289 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6480 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6480 SdHoareTripleChecker+Valid, 3582 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:31,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6480 Valid, 3582 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:31,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38112 states. [2021-12-06 19:33:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38112 to 28726. [2021-12-06 19:33:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28726 states, 28724 states have (on average 1.3215777746831918) internal successors, (37961), 28725 states have internal predecessors, (37961), 0 states have call successors, (0), 0 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 19:33:32,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28726 states to 28726 states and 37961 transitions. [2021-12-06 19:33:32,127 INFO L78 Accepts]: Start accepts. Automaton has 28726 states and 37961 transitions. Word has length 95 [2021-12-06 19:33:32,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:32,128 INFO L470 AbstractCegarLoop]: Abstraction has 28726 states and 37961 transitions. [2021-12-06 19:33:32,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 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 19:33:32,128 INFO L276 IsEmpty]: Start isEmpty. Operand 28726 states and 37961 transitions. [2021-12-06 19:33:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:33:32,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:32,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:32,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 19:33:32,131 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:32,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:32,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1702428119, now seen corresponding path program 1 times [2021-12-06 19:33:32,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:32,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938104814] [2021-12-06 19:33:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:32,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 19:33:32,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:32,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938104814] [2021-12-06 19:33:32,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938104814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:32,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:32,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:33:32,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528227745] [2021-12-06 19:33:32,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:32,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:33:32,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:32,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:33:32,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:33:32,180 INFO L87 Difference]: Start difference. First operand 28726 states and 37961 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 19:33:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:33,559 INFO L93 Difference]: Finished difference Result 45058 states and 61007 transitions. [2021-12-06 19:33:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:33:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 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 95 [2021-12-06 19:33:33,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:33,601 INFO L225 Difference]: With dead ends: 45058 [2021-12-06 19:33:33,601 INFO L226 Difference]: Without dead ends: 41584 [2021-12-06 19:33:33,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:33:33,613 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 6494 mSDsluCounter, 1984 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6494 SdHoareTripleChecker+Valid, 3610 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:33,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6494 Valid, 3610 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:33,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41584 states. [2021-12-06 19:33:34,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41584 to 32198. [2021-12-06 19:33:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32198 states, 32196 states have (on average 1.329637222015157) internal successors, (42809), 32197 states have internal predecessors, (42809), 0 states have call successors, (0), 0 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 19:33:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32198 states to 32198 states and 42809 transitions. [2021-12-06 19:33:34,709 INFO L78 Accepts]: Start accepts. Automaton has 32198 states and 42809 transitions. Word has length 95 [2021-12-06 19:33:34,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:34,709 INFO L470 AbstractCegarLoop]: Abstraction has 32198 states and 42809 transitions. [2021-12-06 19:33:34,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 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 19:33:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 32198 states and 42809 transitions. [2021-12-06 19:33:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:33:34,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:34,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:34,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 19:33:34,712 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:34,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:34,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1357080137, now seen corresponding path program 1 times [2021-12-06 19:33:34,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:34,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650772272] [2021-12-06 19:33:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:34,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 19:33:34,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:34,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650772272] [2021-12-06 19:33:34,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650772272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:34,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:34,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:33:34,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763690295] [2021-12-06 19:33:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:34,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:33:34,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:33:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:33:34,762 INFO L87 Difference]: Start difference. First operand 32198 states and 42809 transitions. Second operand has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 19:33:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:36,394 INFO L93 Difference]: Finished difference Result 48530 states and 65855 transitions. [2021-12-06 19:33:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:33:36,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 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 95 [2021-12-06 19:33:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:36,436 INFO L225 Difference]: With dead ends: 48530 [2021-12-06 19:33:36,436 INFO L226 Difference]: Without dead ends: 45056 [2021-12-06 19:33:36,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:33:36,447 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 6560 mSDsluCounter, 2003 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6560 SdHoareTripleChecker+Valid, 3630 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:36,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6560 Valid, 3630 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 19:33:36,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45056 states. [2021-12-06 19:33:37,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45056 to 35670. [2021-12-06 19:33:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35670 states, 35668 states have (on average 1.336127621397331) internal successors, (47657), 35669 states have internal predecessors, (47657), 0 states have call successors, (0), 0 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 19:33:37,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35670 states to 35670 states and 47657 transitions. [2021-12-06 19:33:37,928 INFO L78 Accepts]: Start accepts. Automaton has 35670 states and 47657 transitions. Word has length 95 [2021-12-06 19:33:37,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:37,929 INFO L470 AbstractCegarLoop]: Abstraction has 35670 states and 47657 transitions. [2021-12-06 19:33:37,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.285714285714286) internal successors, (93), 7 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 19:33:37,929 INFO L276 IsEmpty]: Start isEmpty. Operand 35670 states and 47657 transitions. [2021-12-06 19:33:37,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-06 19:33:37,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:37,932 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:37,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 19:33:37,933 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:37,933 INFO L85 PathProgramCache]: Analyzing trace with hash -63915415, now seen corresponding path program 1 times [2021-12-06 19:33:37,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:37,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267826579] [2021-12-06 19:33:37,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:37,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 19:33:37,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:37,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267826579] [2021-12-06 19:33:37,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267826579] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:33:37,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:33:37,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-06 19:33:37,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507465784] [2021-12-06 19:33:37,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:33:37,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 19:33:37,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 19:33:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 19:33:37,981 INFO L87 Difference]: Start difference. First operand 35670 states and 47657 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 19:33:39,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:33:39,861 INFO L93 Difference]: Finished difference Result 49922 states and 67823 transitions. [2021-12-06 19:33:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 19:33:39,861 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 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 95 [2021-12-06 19:33:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:33:39,905 INFO L225 Difference]: With dead ends: 49922 [2021-12-06 19:33:39,906 INFO L226 Difference]: Without dead ends: 47488 [2021-12-06 19:33:39,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-06 19:33:39,916 INFO L933 BasicCegarLoop]: 1624 mSDtfsCounter, 6561 mSDsluCounter, 1919 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6561 SdHoareTripleChecker+Valid, 3543 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:33:39,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6561 Valid, 3543 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:33:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47488 states. [2021-12-06 19:33:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47488 to 38102. [2021-12-06 19:33:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38102 states, 38100 states have (on average 1.340708661417323) internal successors, (51081), 38101 states have internal predecessors, (51081), 0 states have call successors, (0), 0 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 19:33:41,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38102 states to 38102 states and 51081 transitions. [2021-12-06 19:33:41,645 INFO L78 Accepts]: Start accepts. Automaton has 38102 states and 51081 transitions. Word has length 95 [2021-12-06 19:33:41,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:33:41,645 INFO L470 AbstractCegarLoop]: Abstraction has 38102 states and 51081 transitions. [2021-12-06 19:33:41,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 19:33:41,645 INFO L276 IsEmpty]: Start isEmpty. Operand 38102 states and 51081 transitions. [2021-12-06 19:33:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 19:33:41,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:33:41,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:33:41,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 19:33:41,652 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:33:41,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:33:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1416628636, now seen corresponding path program 1 times [2021-12-06 19:33:41,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:33:41,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478567335] [2021-12-06 19:33:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:41,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:33:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:41,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:33:41,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478567335] [2021-12-06 19:33:41,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478567335] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:33:41,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303874378] [2021-12-06 19:33:41,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:33:41,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:33:41,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:33:41,828 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:33:41,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 19:33:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:33:41,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 19:33:41,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:33:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:42,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:33:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:33:42,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303874378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:33:42,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:33:42,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-12-06 19:33:42,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722373864] [2021-12-06 19:33:42,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:33:42,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-06 19:33:42,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:33:42,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-06 19:33:42,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-12-06 19:33:42,576 INFO L87 Difference]: Start difference. First operand 38102 states and 51081 transitions. Second operand has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 19:34:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:34:07,922 INFO L93 Difference]: Finished difference Result 313628 states and 432662 transitions. [2021-12-06 19:34:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2021-12-06 19:34:07,923 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 0 states have call successors, (0), 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 96 [2021-12-06 19:34:07,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:34:08,285 INFO L225 Difference]: With dead ends: 313628 [2021-12-06 19:34:08,286 INFO L226 Difference]: Without dead ends: 289934 [2021-12-06 19:34:08,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23324 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7066, Invalid=45604, Unknown=0, NotChecked=0, Total=52670 [2021-12-06 19:34:08,351 INFO L933 BasicCegarLoop]: 1777 mSDtfsCounter, 23941 mSDsluCounter, 12212 mSDsCounter, 0 mSdLazyCounter, 5855 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23941 SdHoareTripleChecker+Valid, 13989 SdHoareTripleChecker+Invalid, 6619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 5855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 19:34:08,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23941 Valid, 13989 Invalid, 6619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 5855 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 19:34:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289934 states. [2021-12-06 19:34:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289934 to 187764. [2021-12-06 19:34:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187764 states, 187762 states have (on average 1.3644134595924629) internal successors, (256185), 187763 states have internal predecessors, (256185), 0 states have call successors, (0), 0 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 19:34:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187764 states to 187764 states and 256185 transitions. [2021-12-06 19:34:21,949 INFO L78 Accepts]: Start accepts. Automaton has 187764 states and 256185 transitions. Word has length 96 [2021-12-06 19:34:21,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:34:21,949 INFO L470 AbstractCegarLoop]: Abstraction has 187764 states and 256185 transitions. [2021-12-06 19:34:21,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 11.956521739130435) internal successors, (275), 23 states have internal predecessors, (275), 0 states have call successors, (0), 0 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 19:34:21,949 INFO L276 IsEmpty]: Start isEmpty. Operand 187764 states and 256185 transitions. [2021-12-06 19:34:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 19:34:21,955 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:34:21,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:34:21,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 19:34:22,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-06 19:34:22,157 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:34:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:34:22,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1879245087, now seen corresponding path program 1 times [2021-12-06 19:34:22,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:34:22,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515396772] [2021-12-06 19:34:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:22,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:34:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:34:22,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:34:22,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515396772] [2021-12-06 19:34:22,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515396772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 19:34:22,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188733402] [2021-12-06 19:34:22,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:34:22,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 19:34:22,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 19:34:22,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 19:34:22,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 19:34:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:34:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 19:34:22,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 19:34:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:34:22,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 19:34:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:34:23,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188733402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 19:34:23,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 19:34:23,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2021-12-06 19:34:23,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206562726] [2021-12-06 19:34:23,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 19:34:23,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 19:34:23,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:34:23,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 19:34:23,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-12-06 19:34:23,412 INFO L87 Difference]: Start difference. First operand 187764 states and 256185 transitions. Second operand has 26 states, 26 states have (on average 9.73076923076923) internal successors, (253), 25 states have internal predecessors, (253), 0 states have call successors, (0), 0 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 19:38:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:38:47,754 INFO L93 Difference]: Finished difference Result 3156930 states and 4245669 transitions. [2021-12-06 19:38:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2021-12-06 19:38:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 9.73076923076923) internal successors, (253), 25 states have internal predecessors, (253), 0 states have call successors, (0), 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 97 [2021-12-06 19:38:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:38:52,840 INFO L225 Difference]: With dead ends: 3156930 [2021-12-06 19:38:52,840 INFO L226 Difference]: Without dead ends: 2985730 [2021-12-06 19:38:53,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30753 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=8700, Invalid=65556, Unknown=0, NotChecked=0, Total=74256 [2021-12-06 19:38:53,625 INFO L933 BasicCegarLoop]: 1760 mSDtfsCounter, 22447 mSDsluCounter, 8884 mSDsCounter, 0 mSdLazyCounter, 3778 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22447 SdHoareTripleChecker+Valid, 10644 SdHoareTripleChecker+Invalid, 4160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 3778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 19:38:53,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22447 Valid, 10644 Invalid, 4160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 3778 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 19:38:57,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2985730 states. [2021-12-06 19:40:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2985730 to 873494. [2021-12-06 19:40:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873494 states, 873492 states have (on average 1.3604074221629963) internal successors, (1188305), 873493 states have internal predecessors, (1188305), 0 states have call successors, (0), 0 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 19:40:31,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873494 states to 873494 states and 1188305 transitions. [2021-12-06 19:40:31,935 INFO L78 Accepts]: Start accepts. Automaton has 873494 states and 1188305 transitions. Word has length 97 [2021-12-06 19:40:31,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:40:31,935 INFO L470 AbstractCegarLoop]: Abstraction has 873494 states and 1188305 transitions. [2021-12-06 19:40:31,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.73076923076923) internal successors, (253), 25 states have internal predecessors, (253), 0 states have call successors, (0), 0 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 19:40:31,935 INFO L276 IsEmpty]: Start isEmpty. Operand 873494 states and 1188305 transitions. [2021-12-06 19:40:31,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 19:40:31,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:40:31,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:40:31,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 19:40:32,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7efe1227-2dea-4539-8041-8b34267c0e9e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 19:40:32,148 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:40:32,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:40:32,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1100053385, now seen corresponding path program 1 times [2021-12-06 19:40:32,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:40:32,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672742076] [2021-12-06 19:40:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:40:32,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:40:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:40:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:40:32,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:40:32,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672742076] [2021-12-06 19:40:32,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672742076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:40:32,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:40:32,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:40:32,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254400873] [2021-12-06 19:40:32,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:40:32,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:40:32,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:40:32,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:40:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:40:32,183 INFO L87 Difference]: Start difference. First operand 873494 states and 1188305 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 19:41:51,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:41:51,624 INFO L93 Difference]: Finished difference Result 1730426 states and 2355627 transitions. [2021-12-06 19:41:51,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:41:51,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-06 19:41:51,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:41:52,994 INFO L225 Difference]: With dead ends: 1730426 [2021-12-06 19:41:52,994 INFO L226 Difference]: Without dead ends: 873496 [2021-12-06 19:41:53,561 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 19:41:53,561 INFO L933 BasicCegarLoop]: 1586 mSDtfsCounter, 46 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3129 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 19:41:53,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 3129 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:41:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873496 states. [2021-12-06 19:43:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873496 to 873494. [2021-12-06 19:43:14,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873494 states, 873492 states have (on average 1.3421405118764682) internal successors, (1172349), 873493 states have internal predecessors, (1172349), 0 states have call successors, (0), 0 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 19:43:16,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873494 states to 873494 states and 1172349 transitions. [2021-12-06 19:43:16,728 INFO L78 Accepts]: Start accepts. Automaton has 873494 states and 1172349 transitions. Word has length 97 [2021-12-06 19:43:16,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 19:43:16,728 INFO L470 AbstractCegarLoop]: Abstraction has 873494 states and 1172349 transitions. [2021-12-06 19:43:16,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 19:43:16,729 INFO L276 IsEmpty]: Start isEmpty. Operand 873494 states and 1172349 transitions. [2021-12-06 19:43:16,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 19:43:16,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 19:43:16,736 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 19:43:16,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 19:43:16,736 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 19:43:16,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 19:43:16,736 INFO L85 PathProgramCache]: Analyzing trace with hash 826365673, now seen corresponding path program 1 times [2021-12-06 19:43:16,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 19:43:16,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188614130] [2021-12-06 19:43:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 19:43:16,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 19:43:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 19:43:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 19:43:16,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 19:43:16,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188614130] [2021-12-06 19:43:16,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188614130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 19:43:16,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 19:43:16,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 19:43:16,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808615491] [2021-12-06 19:43:16,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 19:43:16,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 19:43:16,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 19:43:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 19:43:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 19:43:16,766 INFO L87 Difference]: Start difference. First operand 873494 states and 1172349 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 19:43:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 19:43:56,712 INFO L93 Difference]: Finished difference Result 1298088 states and 1741229 transitions. [2021-12-06 19:43:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 19:43:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-06 19:43:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 19:43:57,385 INFO L225 Difference]: With dead ends: 1298088 [2021-12-06 19:43:57,385 INFO L226 Difference]: Without dead ends: 441158 [2021-12-06 19:43:57,921 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 19:43:57,922 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 40 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3122 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 19:43:57,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3122 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 19:43:58,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441158 states.