./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label05.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_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/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_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/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_f6302fc7-4b75-4bd4-8616-ebfc1d013297/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 f28b91143467a6885de009814531d324420ecf879f456eaa915411039fe43e58 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:47:01,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:47:01,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:47:01,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:47:01,799 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:47:01,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:47:01,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:47:01,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:47:01,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:47:01,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:47:01,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:47:01,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:47:01,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:47:01,808 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:47:01,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:47:01,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:47:01,811 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:47:01,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:47:01,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:47:01,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:47:01,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:47:01,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:47:01,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:47:01,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:47:01,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:47:01,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:47:01,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:47:01,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:47:01,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:47:01,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:47:01,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:47:01,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:47:01,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:47:01,827 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:47:01,828 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:47:01,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:47:01,829 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:47:01,829 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:47:01,829 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:47:01,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:47:01,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:47:01,831 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:47:01,848 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:47:01,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:47:01,849 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:47:01,849 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:47:01,849 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:47:01,849 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:47:01,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:47:01,850 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:47:01,850 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:47:01,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:47:01,850 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:47:01,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:47:01,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:47:01,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:47:01,851 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:47:01,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:47:01,851 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:47:01,851 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:47:01,851 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:47:01,851 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:47:01,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:47:01,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:47:01,852 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:47:01,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:47:01,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:47:01,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:47:01,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:47:01,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:47:01,852 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:47:01,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:47:01,852 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:47:01,853 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:47:01,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:47:01,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:47:01,853 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_f6302fc7-4b75-4bd4-8616-ebfc1d013297/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f28b91143467a6885de009814531d324420ecf879f456eaa915411039fe43e58 [2021-12-06 18:47:02,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:47:02,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:47:02,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:47:02,053 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:47:02,054 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:47:02,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-12-06 18:47:02,100 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/data/079cbf73c/bd002d54c2e74021bf75d9d6b9181ca0/FLAG72a3e5d75 [2021-12-06 18:47:02,665 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:47:02,665 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-12-06 18:47:02,684 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/data/079cbf73c/bd002d54c2e74021bf75d9d6b9181ca0/FLAG72a3e5d75 [2021-12-06 18:47:03,100 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/data/079cbf73c/bd002d54c2e74021bf75d9d6b9181ca0 [2021-12-06 18:47:03,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:47:03,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:47:03,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:47:03,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:47:03,114 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:47:03,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:47:03" (1/1) ... [2021-12-06 18:47:03,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c4daf31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:03, skipping insertion in model container [2021-12-06 18:47:03,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:47:03" (1/1) ... [2021-12-06 18:47:03,123 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:47:03,197 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:47:03,425 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_f6302fc7-4b75-4bd4-8616-ebfc1d013297/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label05.c[6450,6463] [2021-12-06 18:47:03,471 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_f6302fc7-4b75-4bd4-8616-ebfc1d013297/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label05.c[13386,13399] [2021-12-06 18:47:04,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:47:04,057 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:47:04,078 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_f6302fc7-4b75-4bd4-8616-ebfc1d013297/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label05.c[6450,6463] [2021-12-06 18:47:04,089 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_f6302fc7-4b75-4bd4-8616-ebfc1d013297/sv-benchmarks/c/combinations/pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label05.c[13386,13399] [2021-12-06 18:47:04,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:47:04,512 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:47:04,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04 WrapperNode [2021-12-06 18:47:04,512 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:47:04,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:47:04,513 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:47:04,513 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:47:04,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (1/1) ... [2021-12-06 18:47:04,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (1/1) ... [2021-12-06 18:47:04,739 INFO L137 Inliner]: procedures = 35, calls = 20, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 4976 [2021-12-06 18:47:04,739 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:47:04,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:47:04,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:47:04,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:47:04,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (1/1) ... [2021-12-06 18:47:04,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (1/1) ... [2021-12-06 18:47:04,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (1/1) ... [2021-12-06 18:47:04,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (1/1) ... [2021-12-06 18:47:04,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (1/1) ... [2021-12-06 18:47:04,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (1/1) ... [2021-12-06 18:47:04,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (1/1) ... [2021-12-06 18:47:05,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:47:05,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:47:05,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:47:05,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:47:05,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (1/1) ... [2021-12-06 18:47:05,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:47:05,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:05,092 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:47:05,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:47:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:47:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:47:05,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:47:05,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:47:05,200 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:47:05,201 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:47:08,093 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:47:08,113 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:47:08,113 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-06 18:47:08,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:47:08 BoogieIcfgContainer [2021-12-06 18:47:08,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:47:08,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:47:08,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:47:08,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:47:08,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:47:03" (1/3) ... [2021-12-06 18:47:08,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@901e8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:47:08, skipping insertion in model container [2021-12-06 18:47:08,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:47:04" (2/3) ... [2021-12-06 18:47:08,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@901e8ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:47:08, skipping insertion in model container [2021-12-06 18:47:08,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:47:08" (3/3) ... [2021-12-06 18:47:08,124 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.UNBOUNDED.pals+Problem12_label05.c [2021-12-06 18:47:08,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:47:08,130 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 18:47:08,174 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:47:08,179 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 18:47:08,179 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 18:47:08,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 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 18:47:08,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:47:08,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:08,213 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] [2021-12-06 18:47:08,213 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1601385972, now seen corresponding path program 1 times [2021-12-06 18:47:08,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:08,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769771234] [2021-12-06 18:47:08,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:08,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:08,346 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 18:47:08,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:08,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769771234] [2021-12-06 18:47:08,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769771234] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:08,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:08,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:47:08,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964445273] [2021-12-06 18:47:08,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:08,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:47:08,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:08,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:47:08,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:47:08,376 INFO L87 Difference]: Start difference. First operand has 880 states, 877 states have (on average 1.903078677309008) internal successors, (1669), 879 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 18:47:08,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:08,486 INFO L93 Difference]: Finished difference Result 1736 states and 3296 transitions. [2021-12-06 18:47:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:47:08,488 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-06 18:47:08,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:08,503 INFO L225 Difference]: With dead ends: 1736 [2021-12-06 18:47:08,503 INFO L226 Difference]: Without dead ends: 814 [2021-12-06 18:47:08,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:47:08,511 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:08,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-06 18:47:08,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-06 18:47:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8916256157635467) internal successors, (1536), 813 states have internal predecessors, (1536), 0 states have call successors, (0), 0 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 18:47:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1536 transitions. [2021-12-06 18:47:08,576 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1536 transitions. Word has length 26 [2021-12-06 18:47:08,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:08,576 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1536 transitions. [2021-12-06 18:47:08,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 18:47:08,576 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1536 transitions. [2021-12-06 18:47:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-06 18:47:08,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:08,577 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] [2021-12-06 18:47:08,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:47:08,578 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:08,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:08,579 INFO L85 PathProgramCache]: Analyzing trace with hash 783737522, now seen corresponding path program 1 times [2021-12-06 18:47:08,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:08,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544694235] [2021-12-06 18:47:08,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:08,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:08,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:08,635 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 18:47:08,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:08,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544694235] [2021-12-06 18:47:08,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544694235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:08,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:08,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:47:08,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038783864] [2021-12-06 18:47:08,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:08,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:47:08,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:08,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:47:08,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:47:08,638 INFO L87 Difference]: Start difference. First operand 814 states and 1536 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 18:47:08,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:08,703 INFO L93 Difference]: Finished difference Result 856 states and 1599 transitions. [2021-12-06 18:47:08,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:47:08,704 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-12-06 18:47:08,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:08,708 INFO L225 Difference]: With dead ends: 856 [2021-12-06 18:47:08,708 INFO L226 Difference]: Without dead ends: 814 [2021-12-06 18:47:08,709 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 18:47:08,710 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 3 mSDsluCounter, 4583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:08,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6117 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:08,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2021-12-06 18:47:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 814. [2021-12-06 18:47:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 812 states have (on average 1.8719211822660098) internal successors, (1520), 813 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 18:47:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1520 transitions. [2021-12-06 18:47:08,729 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1520 transitions. Word has length 26 [2021-12-06 18:47:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:08,730 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1520 transitions. [2021-12-06 18:47:08,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 18:47:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1520 transitions. [2021-12-06 18:47:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:47:08,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:08,731 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] [2021-12-06 18:47:08,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:47:08,732 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:08,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:08,732 INFO L85 PathProgramCache]: Analyzing trace with hash -698732182, now seen corresponding path program 1 times [2021-12-06 18:47:08,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:08,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938679041] [2021-12-06 18:47:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:08,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:08,787 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 18:47:08,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:08,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938679041] [2021-12-06 18:47:08,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938679041] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:08,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:08,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:08,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832552678] [2021-12-06 18:47:08,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:08,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:47:08,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:08,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:47:08,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:47:08,790 INFO L87 Difference]: Start difference. First operand 814 states and 1520 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 18:47:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:08,816 INFO L93 Difference]: Finished difference Result 884 states and 1628 transitions. [2021-12-06 18:47:08,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:47:08,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-06 18:47:08,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:08,843 INFO L225 Difference]: With dead ends: 884 [2021-12-06 18:47:08,843 INFO L226 Difference]: Without dead ends: 846 [2021-12-06 18:47:08,844 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 18:47:08,845 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1484 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 1610 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 18:47:08,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 1610 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-12-06 18:47:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 844. [2021-12-06 18:47:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 842 states have (on average 1.8610451306413303) internal successors, (1567), 843 states have internal predecessors, (1567), 0 states have call successors, (0), 0 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 18:47:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1567 transitions. [2021-12-06 18:47:08,874 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1567 transitions. Word has length 41 [2021-12-06 18:47:08,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:08,874 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 1567 transitions. [2021-12-06 18:47:08,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 18:47:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1567 transitions. [2021-12-06 18:47:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:47:08,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:08,876 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] [2021-12-06 18:47:08,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:47:08,877 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:08,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:08,877 INFO L85 PathProgramCache]: Analyzing trace with hash -360939040, now seen corresponding path program 1 times [2021-12-06 18:47:08,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:08,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170988193] [2021-12-06 18:47:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:08,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:08,937 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 18:47:08,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:08,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170988193] [2021-12-06 18:47:08,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170988193] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:08,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:08,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:08,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153212578] [2021-12-06 18:47:08,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:08,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:47:08,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:08,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:47:08,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:47:08,940 INFO L87 Difference]: Start difference. First operand 844 states and 1567 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 18:47:08,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:08,976 INFO L93 Difference]: Finished difference Result 968 states and 1759 transitions. [2021-12-06 18:47:08,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:47:08,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-06 18:47:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:08,983 INFO L225 Difference]: With dead ends: 968 [2021-12-06 18:47:08,983 INFO L226 Difference]: Without dead ends: 900 [2021-12-06 18:47:08,984 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 18:47:08,985 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 1480 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1609 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 18:47:08,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 1609 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-12-06 18:47:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 898. [2021-12-06 18:47:09,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 896 states have (on average 1.8415178571428572) internal successors, (1650), 897 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 18:47:09,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1650 transitions. [2021-12-06 18:47:09,014 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1650 transitions. Word has length 41 [2021-12-06 18:47:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:09,015 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1650 transitions. [2021-12-06 18:47:09,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 18:47:09,015 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1650 transitions. [2021-12-06 18:47:09,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 18:47:09,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:09,017 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] [2021-12-06 18:47:09,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:47:09,017 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:09,018 INFO L85 PathProgramCache]: Analyzing trace with hash 857046358, now seen corresponding path program 1 times [2021-12-06 18:47:09,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:09,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539795633] [2021-12-06 18:47:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:09,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:09,076 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 18:47:09,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:09,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539795633] [2021-12-06 18:47:09,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539795633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:09,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:09,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:47:09,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881298696] [2021-12-06 18:47:09,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:09,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:47:09,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:09,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:47:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:47:09,079 INFO L87 Difference]: Start difference. First operand 898 states and 1650 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 18:47:09,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:09,172 INFO L93 Difference]: Finished difference Result 1630 states and 2784 transitions. [2021-12-06 18:47:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:47:09,172 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-06 18:47:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:09,180 INFO L225 Difference]: With dead ends: 1630 [2021-12-06 18:47:09,180 INFO L226 Difference]: Without dead ends: 1508 [2021-12-06 18:47:09,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:47:09,181 INFO L933 BasicCegarLoop]: 1516 mSDtfsCounter, 4693 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4693 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:09,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4693 Valid, 1934 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:09,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2021-12-06 18:47:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1018. [2021-12-06 18:47:09,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1016 states have (on average 1.8011811023622046) internal successors, (1830), 1017 states have internal predecessors, (1830), 0 states have call successors, (0), 0 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 18:47:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1830 transitions. [2021-12-06 18:47:09,211 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1830 transitions. Word has length 41 [2021-12-06 18:47:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:09,211 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1830 transitions. [2021-12-06 18:47:09,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 18:47:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1830 transitions. [2021-12-06 18:47:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:47:09,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:09,212 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] [2021-12-06 18:47:09,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 18:47:09,213 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:09,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:09,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1867096070, now seen corresponding path program 1 times [2021-12-06 18:47:09,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:09,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706061867] [2021-12-06 18:47:09,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:09,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:09,248 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 18:47:09,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:09,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706061867] [2021-12-06 18:47:09,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706061867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:09,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:09,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:09,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401233810] [2021-12-06 18:47:09,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:09,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:47:09,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:47:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:47:09,250 INFO L87 Difference]: Start difference. First operand 1018 states and 1830 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 18:47:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:09,284 INFO L93 Difference]: Finished difference Result 1458 states and 2492 transitions. [2021-12-06 18:47:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:47:09,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-06 18:47:09,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:09,290 INFO L225 Difference]: With dead ends: 1458 [2021-12-06 18:47:09,290 INFO L226 Difference]: Without dead ends: 1216 [2021-12-06 18:47:09,291 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 18:47:09,292 INFO L933 BasicCegarLoop]: 1517 mSDtfsCounter, 1471 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:09,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1471 Valid, 1569 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:09,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-12-06 18:47:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1206. [2021-12-06 18:47:09,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1204 states have (on average 1.739202657807309) internal successors, (2094), 1205 states have internal predecessors, (2094), 0 states have call successors, (0), 0 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 18:47:09,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2094 transitions. [2021-12-06 18:47:09,320 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2094 transitions. Word has length 43 [2021-12-06 18:47:09,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:09,321 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2094 transitions. [2021-12-06 18:47:09,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 18:47:09,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2094 transitions. [2021-12-06 18:47:09,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:47:09,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:09,322 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] [2021-12-06 18:47:09,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 18:47:09,322 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:09,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:09,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1933589582, now seen corresponding path program 1 times [2021-12-06 18:47:09,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:09,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675710399] [2021-12-06 18:47:09,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:09,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:09,395 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 18:47:09,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:09,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675710399] [2021-12-06 18:47:09,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675710399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:09,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:09,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:47:09,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138010448] [2021-12-06 18:47:09,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:09,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:47:09,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:09,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:47:09,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:47:09,397 INFO L87 Difference]: Start difference. First operand 1206 states and 2094 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 18:47:09,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:09,471 INFO L93 Difference]: Finished difference Result 1638 states and 2728 transitions. [2021-12-06 18:47:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:47:09,471 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-12-06 18:47:09,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:09,479 INFO L225 Difference]: With dead ends: 1638 [2021-12-06 18:47:09,479 INFO L226 Difference]: Without dead ends: 1208 [2021-12-06 18:47:09,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:47:09,481 INFO L933 BasicCegarLoop]: 1515 mSDtfsCounter, 1531 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:09,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 1680 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1208 states. [2021-12-06 18:47:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1208 to 1206. [2021-12-06 18:47:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1204 states have (on average 1.7325581395348837) internal successors, (2086), 1205 states have internal predecessors, (2086), 0 states have call successors, (0), 0 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 18:47:09,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2086 transitions. [2021-12-06 18:47:09,523 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2086 transitions. Word has length 43 [2021-12-06 18:47:09,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:09,524 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2086 transitions. [2021-12-06 18:47:09,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 18:47:09,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2086 transitions. [2021-12-06 18:47:09,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 18:47:09,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:09,525 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] [2021-12-06 18:47:09,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 18:47:09,526 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:09,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:09,526 INFO L85 PathProgramCache]: Analyzing trace with hash -602988295, now seen corresponding path program 1 times [2021-12-06 18:47:09,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:09,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190456977] [2021-12-06 18:47:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:09,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:09,585 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 18:47:09,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:09,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190456977] [2021-12-06 18:47:09,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190456977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:09,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:09,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:47:09,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170952199] [2021-12-06 18:47:09,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:09,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:47:09,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:09,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:47:09,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:47:09,587 INFO L87 Difference]: Start difference. First operand 1206 states and 2086 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 18:47:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:09,691 INFO L93 Difference]: Finished difference Result 1540 states and 2558 transitions. [2021-12-06 18:47:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 18:47:09,692 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-12-06 18:47:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:09,699 INFO L225 Difference]: With dead ends: 1540 [2021-12-06 18:47:09,699 INFO L226 Difference]: Without dead ends: 1538 [2021-12-06 18:47:09,700 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 18:47:09,700 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 147 mSDsluCounter, 4562 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6117 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:09,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 6117 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:09,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-12-06 18:47:09,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1230. [2021-12-06 18:47:09,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1228 states have (on average 1.714983713355049) internal successors, (2106), 1229 states have internal predecessors, (2106), 0 states have call successors, (0), 0 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 18:47:09,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2106 transitions. [2021-12-06 18:47:09,742 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2106 transitions. Word has length 44 [2021-12-06 18:47:09,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:09,742 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2106 transitions. [2021-12-06 18:47:09,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 18:47:09,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2106 transitions. [2021-12-06 18:47:09,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-06 18:47:09,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:09,743 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] [2021-12-06 18:47:09,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 18:47:09,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:09,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1900121563, now seen corresponding path program 1 times [2021-12-06 18:47:09,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:09,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862385901] [2021-12-06 18:47:09,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:09,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:09,770 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 18:47:09,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:09,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862385901] [2021-12-06 18:47:09,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862385901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:09,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:09,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:09,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142388602] [2021-12-06 18:47:09,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:09,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:47:09,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:09,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:47:09,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:47:09,772 INFO L87 Difference]: Start difference. First operand 1230 states and 2106 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 18:47:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:09,834 INFO L93 Difference]: Finished difference Result 1701 states and 2784 transitions. [2021-12-06 18:47:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:47:09,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2021-12-06 18:47:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:09,844 INFO L225 Difference]: With dead ends: 1701 [2021-12-06 18:47:09,844 INFO L226 Difference]: Without dead ends: 1434 [2021-12-06 18:47:09,845 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 18:47:09,846 INFO L933 BasicCegarLoop]: 1558 mSDtfsCounter, 1485 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1615 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 18:47:09,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1615 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1434 states. [2021-12-06 18:47:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1434 to 1432. [2021-12-06 18:47:09,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1430 states have (on average 1.6671328671328671) internal successors, (2384), 1431 states have internal predecessors, (2384), 0 states have call successors, (0), 0 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 18:47:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2384 transitions. [2021-12-06 18:47:09,918 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2384 transitions. Word has length 45 [2021-12-06 18:47:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:09,919 INFO L470 AbstractCegarLoop]: Abstraction has 1432 states and 2384 transitions. [2021-12-06 18:47:09,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 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 18:47:09,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2384 transitions. [2021-12-06 18:47:09,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-06 18:47:09,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:09,920 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] [2021-12-06 18:47:09,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 18:47:09,921 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1685382213, now seen corresponding path program 1 times [2021-12-06 18:47:09,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:09,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745124966] [2021-12-06 18:47:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:09,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:09,996 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 18:47:09,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:09,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745124966] [2021-12-06 18:47:09,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745124966] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:09,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:09,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:09,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142361888] [2021-12-06 18:47:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:09,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:47:09,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:47:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:47:09,998 INFO L87 Difference]: Start difference. First operand 1432 states and 2384 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 18:47:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:14,626 INFO L93 Difference]: Finished difference Result 3687 states and 6693 transitions. [2021-12-06 18:47:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:47:14,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-12-06 18:47:14,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:14,638 INFO L225 Difference]: With dead ends: 3687 [2021-12-06 18:47:14,638 INFO L226 Difference]: Without dead ends: 2934 [2021-12-06 18:47:14,640 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 18:47:14,640 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 2347 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2347 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:14,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2347 Valid, 774 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-06 18:47:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-12-06 18:47:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 2934. [2021-12-06 18:47:14,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2934 states, 2932 states have (on average 1.534106412005457) internal successors, (4498), 2933 states have internal predecessors, (4498), 0 states have call successors, (0), 0 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 18:47:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4498 transitions. [2021-12-06 18:47:14,708 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4498 transitions. Word has length 60 [2021-12-06 18:47:14,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:14,708 INFO L470 AbstractCegarLoop]: Abstraction has 2934 states and 4498 transitions. [2021-12-06 18:47:14,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 18:47:14,708 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4498 transitions. [2021-12-06 18:47:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 18:47:14,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:14,709 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] [2021-12-06 18:47:14,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 18:47:14,709 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:14,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:14,710 INFO L85 PathProgramCache]: Analyzing trace with hash -393288849, now seen corresponding path program 1 times [2021-12-06 18:47:14,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:14,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666140549] [2021-12-06 18:47:14,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:14,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:47:14,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666140549] [2021-12-06 18:47:14,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666140549] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:14,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:14,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:47:14,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860013806] [2021-12-06 18:47:14,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:14,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:47:14,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:47:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:47:14,750 INFO L87 Difference]: Start difference. First operand 2934 states and 4498 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:47:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:14,870 INFO L93 Difference]: Finished difference Result 5038 states and 7450 transitions. [2021-12-06 18:47:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:47:14,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 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 18:47:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:14,887 INFO L225 Difference]: With dead ends: 5038 [2021-12-06 18:47:14,888 INFO L226 Difference]: Without dead ends: 4384 [2021-12-06 18:47:14,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:47:14,890 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3088 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3088 SdHoareTripleChecker+Valid, 3191 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:14,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3088 Valid, 3191 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:14,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2021-12-06 18:47:14,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 3586. [2021-12-06 18:47:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3584 states have (on average 1.5083705357142858) internal successors, (5406), 3585 states have internal predecessors, (5406), 0 states have call successors, (0), 0 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 18:47:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 5406 transitions. [2021-12-06 18:47:14,991 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 5406 transitions. Word has length 64 [2021-12-06 18:47:14,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:14,991 INFO L470 AbstractCegarLoop]: Abstraction has 3586 states and 5406 transitions. [2021-12-06 18:47:14,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 18:47:14,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 5406 transitions. [2021-12-06 18:47:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-06 18:47:14,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:14,993 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] [2021-12-06 18:47:14,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 18:47:14,993 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2132895631, now seen corresponding path program 1 times [2021-12-06 18:47:14,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:14,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848925441] [2021-12-06 18:47:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:14,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:47:15,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:15,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848925441] [2021-12-06 18:47:15,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848925441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:15,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:15,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:47:15,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875675758] [2021-12-06 18:47:15,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:15,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:47:15,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:15,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:47:15,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:47:15,038 INFO L87 Difference]: Start difference. First operand 3586 states and 5406 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 18:47:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:15,219 INFO L93 Difference]: Finished difference Result 5690 states and 8358 transitions. [2021-12-06 18:47:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:47:15,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 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 18:47:15,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:15,239 INFO L225 Difference]: With dead ends: 5690 [2021-12-06 18:47:15,239 INFO L226 Difference]: Without dead ends: 5036 [2021-12-06 18:47:15,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:47:15,242 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3082 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3082 SdHoareTripleChecker+Valid, 3206 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:15,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3082 Valid, 3206 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:15,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5036 states. [2021-12-06 18:47:15,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5036 to 4566. [2021-12-06 18:47:15,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4566 states, 4564 states have (on average 1.4807186678352322) internal successors, (6758), 4565 states have internal predecessors, (6758), 0 states have call successors, (0), 0 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 18:47:15,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 6758 transitions. [2021-12-06 18:47:15,375 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 6758 transitions. Word has length 64 [2021-12-06 18:47:15,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:15,376 INFO L470 AbstractCegarLoop]: Abstraction has 4566 states and 6758 transitions. [2021-12-06 18:47:15,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 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 18:47:15,376 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 6758 transitions. [2021-12-06 18:47:15,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 18:47:15,377 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:15,377 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] [2021-12-06 18:47:15,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 18:47:15,377 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:15,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1342668761, now seen corresponding path program 1 times [2021-12-06 18:47:15,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:15,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697202213] [2021-12-06 18:47:15,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:15,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:15,410 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:15,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:15,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697202213] [2021-12-06 18:47:15,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697202213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:15,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:15,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:15,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971638750] [2021-12-06 18:47:15,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:15,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:47:15,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:15,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:47:15,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:47:15,412 INFO L87 Difference]: Start difference. First operand 4566 states and 6758 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 18:47:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:15,485 INFO L93 Difference]: Finished difference Result 6216 states and 9082 transitions. [2021-12-06 18:47:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:47:15,486 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 18:47:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:15,504 INFO L225 Difference]: With dead ends: 6216 [2021-12-06 18:47:15,504 INFO L226 Difference]: Without dead ends: 3930 [2021-12-06 18:47:15,508 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 18:47:15,508 INFO L933 BasicCegarLoop]: 1544 mSDtfsCounter, 36 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3048 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 18:47:15,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3048 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:15,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2021-12-06 18:47:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2021-12-06 18:47:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3926 states have (on average 1.4954151808456444) internal successors, (5871), 3927 states have internal predecessors, (5871), 0 states have call successors, (0), 0 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 18:47:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5871 transitions. [2021-12-06 18:47:15,613 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5871 transitions. Word has length 66 [2021-12-06 18:47:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:15,613 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 5871 transitions. [2021-12-06 18:47:15,613 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 18:47:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5871 transitions. [2021-12-06 18:47:15,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 18:47:15,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:15,614 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:47:15,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 18:47:15,614 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:15,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:15,615 INFO L85 PathProgramCache]: Analyzing trace with hash -366937100, now seen corresponding path program 1 times [2021-12-06 18:47:15,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:15,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962290066] [2021-12-06 18:47:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:15,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:47:15,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:15,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962290066] [2021-12-06 18:47:15,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962290066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:15,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:15,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:47:15,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063870011] [2021-12-06 18:47:15,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:15,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:47:15,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:15,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:47:15,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:47:15,676 INFO L87 Difference]: Start difference. First operand 3928 states and 5871 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:15,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:15,829 INFO L93 Difference]: Finished difference Result 5328 states and 7843 transitions. [2021-12-06 18:47:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:47:15,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-06 18:47:15,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:15,838 INFO L225 Difference]: With dead ends: 5328 [2021-12-06 18:47:15,838 INFO L226 Difference]: Without dead ends: 4862 [2021-12-06 18:47:15,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 18:47:15,840 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3074 mSDsluCounter, 1647 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3074 SdHoareTripleChecker+Valid, 3215 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:15,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3074 Valid, 3215 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:15,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-12-06 18:47:15,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4392. [2021-12-06 18:47:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4392 states, 4390 states have (on average 1.4849658314350798) internal successors, (6519), 4391 states have internal predecessors, (6519), 0 states have call successors, (0), 0 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 18:47:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 6519 transitions. [2021-12-06 18:47:15,960 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 6519 transitions. Word has length 66 [2021-12-06 18:47:15,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:15,961 INFO L470 AbstractCegarLoop]: Abstraction has 4392 states and 6519 transitions. [2021-12-06 18:47:15,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:15,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 6519 transitions. [2021-12-06 18:47:15,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-06 18:47:15,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:15,962 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:47:15,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:47:15,962 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:15,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:15,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1328887140, now seen corresponding path program 1 times [2021-12-06 18:47:15,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:15,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729215810] [2021-12-06 18:47:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:15,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:16,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:16,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:16,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729215810] [2021-12-06 18:47:16,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729215810] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:16,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060658971] [2021-12-06 18:47:16,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:16,137 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:16,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:16,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:47:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:16,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:47:16,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:47:16,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:16,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:47:16,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060658971] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:16,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:16,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-06 18:47:16,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883355496] [2021-12-06 18:47:16,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:16,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:47:16,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:16,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:47:16,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:47:16,561 INFO L87 Difference]: Start difference. First operand 4392 states and 6519 transitions. Second operand has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 18:47:19,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:19,042 INFO L93 Difference]: Finished difference Result 23693 states and 32912 transitions. [2021-12-06 18:47:19,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 18:47:19,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 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 18:47:19,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:19,069 INFO L225 Difference]: With dead ends: 23693 [2021-12-06 18:47:19,069 INFO L226 Difference]: Without dead ends: 21603 [2021-12-06 18:47:19,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1015, Invalid=4837, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 18:47:19,075 INFO L933 BasicCegarLoop]: 1567 mSDtfsCounter, 16498 mSDsluCounter, 5321 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16498 SdHoareTripleChecker+Valid, 6888 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:19,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16498 Valid, 6888 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:47:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21603 states. [2021-12-06 18:47:19,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21603 to 13256. [2021-12-06 18:47:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13256 states, 13254 states have (on average 1.3722649766108346) internal successors, (18188), 13255 states have internal predecessors, (18188), 0 states have call successors, (0), 0 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 18:47:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13256 states to 13256 states and 18188 transitions. [2021-12-06 18:47:19,686 INFO L78 Accepts]: Start accepts. Automaton has 13256 states and 18188 transitions. Word has length 67 [2021-12-06 18:47:19,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:19,686 INFO L470 AbstractCegarLoop]: Abstraction has 13256 states and 18188 transitions. [2021-12-06 18:47:19,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.222222222222221) internal successors, (184), 18 states have internal predecessors, (184), 0 states have call successors, (0), 0 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 18:47:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 13256 states and 18188 transitions. [2021-12-06 18:47:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 18:47:19,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:19,687 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] [2021-12-06 18:47:19,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:47:19,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 18:47:19,889 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1627365196, now seen corresponding path program 1 times [2021-12-06 18:47:19,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:19,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248097918] [2021-12-06 18:47:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:19,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:20,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:20,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248097918] [2021-12-06 18:47:20,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248097918] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:20,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591883541] [2021-12-06 18:47:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:20,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:20,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:20,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:20,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:47:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:20,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:47:20,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:20,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:20,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591883541] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:20,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:20,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 27 [2021-12-06 18:47:20,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752313554] [2021-12-06 18:47:20,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:20,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-06 18:47:20,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:20,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-06 18:47:20,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-12-06 18:47:20,914 INFO L87 Difference]: Start difference. First operand 13256 states and 18188 transitions. Second operand has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 18:47:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:24,900 INFO L93 Difference]: Finished difference Result 69828 states and 92514 transitions. [2021-12-06 18:47:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-12-06 18:47:24,901 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 18:47:24,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:24,997 INFO L225 Difference]: With dead ends: 69828 [2021-12-06 18:47:24,998 INFO L226 Difference]: Without dead ends: 60560 [2021-12-06 18:47:25,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1354, Invalid=4048, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 18:47:25,012 INFO L933 BasicCegarLoop]: 1548 mSDtfsCounter, 15784 mSDsluCounter, 6653 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15784 SdHoareTripleChecker+Valid, 8201 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:25,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15784 Valid, 8201 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:47:25,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60560 states. [2021-12-06 18:47:26,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60560 to 27725. [2021-12-06 18:47:26,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27725 states, 27723 states have (on average 1.3484471377556542) internal successors, (37383), 27724 states have internal predecessors, (37383), 0 states have call successors, (0), 0 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 18:47:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27725 states to 27725 states and 37383 transitions. [2021-12-06 18:47:26,696 INFO L78 Accepts]: Start accepts. Automaton has 27725 states and 37383 transitions. Word has length 68 [2021-12-06 18:47:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:26,696 INFO L470 AbstractCegarLoop]: Abstraction has 27725 states and 37383 transitions. [2021-12-06 18:47:26,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.285714285714286) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 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 18:47:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 27725 states and 37383 transitions. [2021-12-06 18:47:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 18:47:26,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:26,698 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:47:26,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:47:26,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 18:47:26,900 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:26,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:26,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1374174942, now seen corresponding path program 1 times [2021-12-06 18:47:26,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:26,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653042216] [2021-12-06 18:47:26,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:26,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:27,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:27,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653042216] [2021-12-06 18:47:27,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653042216] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318130801] [2021-12-06 18:47:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:27,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:27,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:27,037 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:27,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:47:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:27,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:47:27,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:47:27,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:27,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:47:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:27,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318130801] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:47:27,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:47:27,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 18:47:27,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281482544] [2021-12-06 18:47:27,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:47:27,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:47:27,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:27,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:47:27,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:47:27,884 INFO L87 Difference]: Start difference. First operand 27725 states and 37383 transitions. Second operand has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 18:47:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:34,043 INFO L93 Difference]: Finished difference Result 115116 states and 151832 transitions. [2021-12-06 18:47:34,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 18:47:34,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 18:47:34,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:34,163 INFO L225 Difference]: With dead ends: 115116 [2021-12-06 18:47:34,163 INFO L226 Difference]: Without dead ends: 92893 [2021-12-06 18:47:34,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=1396, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:47:34,193 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 9279 mSDsluCounter, 6447 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9279 SdHoareTripleChecker+Valid, 7978 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:34,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9279 Valid, 7978 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:47:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92893 states. [2021-12-06 18:47:37,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92893 to 54762. [2021-12-06 18:47:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54762 states, 54760 states have (on average 1.3221146822498173) internal successors, (72399), 54761 states have internal predecessors, (72399), 0 states have call successors, (0), 0 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 18:47:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54762 states to 54762 states and 72399 transitions. [2021-12-06 18:47:37,704 INFO L78 Accepts]: Start accepts. Automaton has 54762 states and 72399 transitions. Word has length 68 [2021-12-06 18:47:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:37,704 INFO L470 AbstractCegarLoop]: Abstraction has 54762 states and 72399 transitions. [2021-12-06 18:47:37,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.095238095238095) internal successors, (149), 20 states have internal predecessors, (149), 0 states have call successors, (0), 0 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 18:47:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 54762 states and 72399 transitions. [2021-12-06 18:47:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 18:47:37,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:37,706 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] [2021-12-06 18:47:37,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:47:37,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:47:37,907 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:37,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:37,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1702537876, now seen corresponding path program 1 times [2021-12-06 18:47:37,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:37,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772766061] [2021-12-06 18:47:37,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:37,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:37,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:37,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772766061] [2021-12-06 18:47:37,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772766061] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:37,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:37,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:37,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297245980] [2021-12-06 18:47:37,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:37,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:47:37,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:37,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:47:37,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:47:37,936 INFO L87 Difference]: Start difference. First operand 54762 states and 72399 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:39,977 INFO L93 Difference]: Finished difference Result 79200 states and 103942 transitions. [2021-12-06 18:47:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:47:39,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 18:47:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:40,011 INFO L225 Difference]: With dead ends: 79200 [2021-12-06 18:47:40,011 INFO L226 Difference]: Without dead ends: 32120 [2021-12-06 18:47:40,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:47:40,042 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 26 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3030 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 18:47:40,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 3030 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32120 states. [2021-12-06 18:47:41,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32120 to 31692. [2021-12-06 18:47:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31692 states, 31690 states have (on average 1.2933733038813506) internal successors, (40987), 31691 states have internal predecessors, (40987), 0 states have call successors, (0), 0 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 18:47:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31692 states to 31692 states and 40987 transitions. [2021-12-06 18:47:41,880 INFO L78 Accepts]: Start accepts. Automaton has 31692 states and 40987 transitions. Word has length 68 [2021-12-06 18:47:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:41,880 INFO L470 AbstractCegarLoop]: Abstraction has 31692 states and 40987 transitions. [2021-12-06 18:47:41,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 31692 states and 40987 transitions. [2021-12-06 18:47:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 18:47:41,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:41,882 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] [2021-12-06 18:47:41,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 18:47:41,882 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:41,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:41,882 INFO L85 PathProgramCache]: Analyzing trace with hash 455030260, now seen corresponding path program 1 times [2021-12-06 18:47:41,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:41,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310992924] [2021-12-06 18:47:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:41,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:41,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:41,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310992924] [2021-12-06 18:47:41,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310992924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:41,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:41,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:47:41,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277040544] [2021-12-06 18:47:41,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:41,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:47:41,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:41,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:47:41,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:47:41,908 INFO L87 Difference]: Start difference. First operand 31692 states and 40987 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:43,034 INFO L93 Difference]: Finished difference Result 47678 states and 61201 transitions. [2021-12-06 18:47:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:47:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 18:47:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:43,057 INFO L225 Difference]: With dead ends: 47678 [2021-12-06 18:47:43,057 INFO L226 Difference]: Without dead ends: 21614 [2021-12-06 18:47:43,073 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 18:47:43,073 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 20 mSDsluCounter, 1492 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 3021 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 18:47:43,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21614 states. [2021-12-06 18:47:44,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21614 to 21612. [2021-12-06 18:47:44,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21612 states, 21610 states have (on average 1.2746876446089774) internal successors, (27546), 21611 states have internal predecessors, (27546), 0 states have call successors, (0), 0 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 18:47:44,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21612 states to 21612 states and 27546 transitions. [2021-12-06 18:47:44,242 INFO L78 Accepts]: Start accepts. Automaton has 21612 states and 27546 transitions. Word has length 68 [2021-12-06 18:47:44,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:44,243 INFO L470 AbstractCegarLoop]: Abstraction has 21612 states and 27546 transitions. [2021-12-06 18:47:44,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:44,243 INFO L276 IsEmpty]: Start isEmpty. Operand 21612 states and 27546 transitions. [2021-12-06 18:47:44,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 18:47:44,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:44,244 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:47:44,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 18:47:44,244 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:44,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:44,244 INFO L85 PathProgramCache]: Analyzing trace with hash 530169440, now seen corresponding path program 1 times [2021-12-06 18:47:44,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:44,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501908458] [2021-12-06 18:47:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:44,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:44,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:47:44,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:44,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501908458] [2021-12-06 18:47:44,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501908458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:44,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:44,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:47:44,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760522382] [2021-12-06 18:47:44,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:44,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:47:44,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:47:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:47:44,280 INFO L87 Difference]: Start difference. First operand 21612 states and 27546 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:45,320 INFO L93 Difference]: Finished difference Result 37375 states and 47271 transitions. [2021-12-06 18:47:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:47:45,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 18:47:45,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:45,337 INFO L225 Difference]: With dead ends: 37375 [2021-12-06 18:47:45,338 INFO L226 Difference]: Without dead ends: 18128 [2021-12-06 18:47:45,346 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 18:47:45,347 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4553 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 2957 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:45,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 2957 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18128 states. [2021-12-06 18:47:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18128 to 18128. [2021-12-06 18:47:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18128 states, 18126 states have (on average 1.2665783956747214) internal successors, (22958), 18127 states have internal predecessors, (22958), 0 states have call successors, (0), 0 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 18:47:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18128 states to 18128 states and 22958 transitions. [2021-12-06 18:47:46,599 INFO L78 Accepts]: Start accepts. Automaton has 18128 states and 22958 transitions. Word has length 68 [2021-12-06 18:47:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:46,599 INFO L470 AbstractCegarLoop]: Abstraction has 18128 states and 22958 transitions. [2021-12-06 18:47:46,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 18128 states and 22958 transitions. [2021-12-06 18:47:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 18:47:46,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:46,600 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:47:46,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 18:47:46,600 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1360814688, now seen corresponding path program 1 times [2021-12-06 18:47:46,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:46,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828909875] [2021-12-06 18:47:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:46,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:46,635 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 18:47:46,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:46,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828909875] [2021-12-06 18:47:46,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828909875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:46,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:46,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:47:46,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982838283] [2021-12-06 18:47:46,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:46,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:47:46,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:47:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:47:46,636 INFO L87 Difference]: Start difference. First operand 18128 states and 22958 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 18:47:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:47,454 INFO L93 Difference]: Finished difference Result 29739 states and 37209 transitions. [2021-12-06 18:47:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:47:47,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 68 [2021-12-06 18:47:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:47,467 INFO L225 Difference]: With dead ends: 29739 [2021-12-06 18:47:47,467 INFO L226 Difference]: Without dead ends: 14008 [2021-12-06 18:47:47,476 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 18:47:47,476 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4513 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4513 SdHoareTripleChecker+Valid, 2962 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:47,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4513 Valid, 2962 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:47,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14008 states. [2021-12-06 18:47:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14008 to 14008. [2021-12-06 18:47:48,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14008 states, 14006 states have (on average 1.2621019563044409) internal successors, (17677), 14007 states have internal predecessors, (17677), 0 states have call successors, (0), 0 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 18:47:48,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14008 states to 14008 states and 17677 transitions. [2021-12-06 18:47:48,300 INFO L78 Accepts]: Start accepts. Automaton has 14008 states and 17677 transitions. Word has length 68 [2021-12-06 18:47:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:48,300 INFO L470 AbstractCegarLoop]: Abstraction has 14008 states and 17677 transitions. [2021-12-06 18:47:48,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 18:47:48,300 INFO L276 IsEmpty]: Start isEmpty. Operand 14008 states and 17677 transitions. [2021-12-06 18:47:48,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 18:47:48,301 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:48,301 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:47:48,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 18:47:48,301 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:48,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:48,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1355942016, now seen corresponding path program 1 times [2021-12-06 18:47:48,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:48,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292048478] [2021-12-06 18:47:48,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:48,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:48,332 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 18:47:48,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:48,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292048478] [2021-12-06 18:47:48,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292048478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:47:48,332 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:47:48,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:47:48,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086571922] [2021-12-06 18:47:48,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:47:48,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 18:47:48,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:47:48,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 18:47:48,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 18:47:48,333 INFO L87 Difference]: Start difference. First operand 14008 states and 17677 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:49,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:47:49,017 INFO L93 Difference]: Finished difference Result 23014 states and 28602 transitions. [2021-12-06 18:47:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 18:47:49,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-06 18:47:49,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:47:49,027 INFO L225 Difference]: With dead ends: 23014 [2021-12-06 18:47:49,027 INFO L226 Difference]: Without dead ends: 11324 [2021-12-06 18:47:49,034 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 18:47:49,035 INFO L933 BasicCegarLoop]: 1493 mSDtfsCounter, 4519 mSDsluCounter, 1463 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4519 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:47:49,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4519 Valid, 2956 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:47:49,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11324 states. [2021-12-06 18:47:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11324 to 11324. [2021-12-06 18:47:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11324 states, 11322 states have (on average 1.268150503444621) internal successors, (14358), 11323 states have internal predecessors, (14358), 0 states have call successors, (0), 0 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 18:47:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11324 states to 11324 states and 14358 transitions. [2021-12-06 18:47:49,682 INFO L78 Accepts]: Start accepts. Automaton has 11324 states and 14358 transitions. Word has length 68 [2021-12-06 18:47:49,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:47:49,682 INFO L470 AbstractCegarLoop]: Abstraction has 11324 states and 14358 transitions. [2021-12-06 18:47:49,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:47:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 11324 states and 14358 transitions. [2021-12-06 18:47:49,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 18:47:49,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:47:49,683 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:47:49,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 18:47:49,683 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:47:49,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:47:49,683 INFO L85 PathProgramCache]: Analyzing trace with hash -576881103, now seen corresponding path program 1 times [2021-12-06 18:47:49,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:47:49,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090874598] [2021-12-06 18:47:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:49,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:47:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:47:50,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:47:50,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090874598] [2021-12-06 18:47:50,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090874598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:47:50,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771354636] [2021-12-06 18:47:50,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:47:50,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:47:50,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:47:50,179 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:47:50,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:47:50,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:47:50,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 18:47:50,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:48:13,492 WARN L227 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 2800 DAG size of output: 2805 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:53:21,831 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:21,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:53:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:53:24,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771354636] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:53:24,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:53:24,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 63 [2021-12-06 18:53:24,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206317089] [2021-12-06 18:53:24,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:53:24,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 18:53:24,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:53:24,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 18:53:24,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=3503, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 18:53:24,518 INFO L87 Difference]: Start difference. First operand 11324 states and 14358 transitions. Second operand has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 63 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 18:54:11,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:54:11,720 INFO L93 Difference]: Finished difference Result 34113 states and 41124 transitions. [2021-12-06 18:54:11,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-12-06 18:54:11,722 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 63 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-12-06 18:54:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:54:11,749 INFO L225 Difference]: With dead ends: 34113 [2021-12-06 18:54:11,750 INFO L226 Difference]: Without dead ends: 28674 [2021-12-06 18:54:11,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24598 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=9351, Invalid=55929, Unknown=0, NotChecked=0, Total=65280 [2021-12-06 18:54:11,773 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 17375 mSDsluCounter, 35600 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17375 SdHoareTripleChecker+Valid, 37265 SdHoareTripleChecker+Invalid, 3584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:54:11,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17375 Valid, 37265 Invalid, 3584 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [583 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-06 18:54:11,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28674 states. [2021-12-06 18:54:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28674 to 13564. [2021-12-06 18:54:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13564 states, 13562 states have (on average 1.2606547706827902) internal successors, (17097), 13563 states have internal predecessors, (17097), 0 states have call successors, (0), 0 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 18:54:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13564 states to 13564 states and 17097 transitions. [2021-12-06 18:54:12,950 INFO L78 Accepts]: Start accepts. Automaton has 13564 states and 17097 transitions. Word has length 69 [2021-12-06 18:54:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:54:12,950 INFO L470 AbstractCegarLoop]: Abstraction has 13564 states and 17097 transitions. [2021-12-06 18:54:12,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.984126984126984) internal successors, (188), 63 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 18:54:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 13564 states and 17097 transitions. [2021-12-06 18:54:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 18:54:12,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:54:12,951 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] [2021-12-06 18:54:12,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:54:13,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 18:54:13,153 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:54:13,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:54:13,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1413115926, now seen corresponding path program 1 times [2021-12-06 18:54:13,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:54:13,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233201702] [2021-12-06 18:54:13,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:13,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:54:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:13,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:54:13,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233201702] [2021-12-06 18:54:13,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233201702] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:54:13,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134054819] [2021-12-06 18:54:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:13,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:54:13,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:54:13,412 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:54:13,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:54:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:13,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 18:54:13,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:54:14,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:14,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:54:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:14,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134054819] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:54:14,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:54:14,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2021-12-06 18:54:14,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445936404] [2021-12-06 18:54:14,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:54:14,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 18:54:14,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:54:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 18:54:14,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:54:14,792 INFO L87 Difference]: Start difference. First operand 13564 states and 17097 transitions. Second operand has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 30 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:17,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:54:17,030 INFO L93 Difference]: Finished difference Result 19688 states and 24639 transitions. [2021-12-06 18:54:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:54:17,031 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 30 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-06 18:54:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:54:17,042 INFO L225 Difference]: With dead ends: 19688 [2021-12-06 18:54:17,042 INFO L226 Difference]: Without dead ends: 14632 [2021-12-06 18:54:17,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=320, Invalid=1320, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:54:17,046 INFO L933 BasicCegarLoop]: 1572 mSDtfsCounter, 9585 mSDsluCounter, 18615 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9585 SdHoareTripleChecker+Valid, 20187 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:54:17,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9585 Valid, 20187 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:54:17,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14632 states. [2021-12-06 18:54:17,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14632 to 11472. [2021-12-06 18:54:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11472 states, 11470 states have (on average 1.2683522231909328) internal successors, (14548), 11471 states have internal predecessors, (14548), 0 states have call successors, (0), 0 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 18:54:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11472 states to 11472 states and 14548 transitions. [2021-12-06 18:54:18,010 INFO L78 Accepts]: Start accepts. Automaton has 11472 states and 14548 transitions. Word has length 71 [2021-12-06 18:54:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:54:18,010 INFO L470 AbstractCegarLoop]: Abstraction has 11472 states and 14548 transitions. [2021-12-06 18:54:18,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.533333333333333) internal successors, (166), 30 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:54:18,010 INFO L276 IsEmpty]: Start isEmpty. Operand 11472 states and 14548 transitions. [2021-12-06 18:54:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 18:54:18,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:54:18,011 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] [2021-12-06 18:54:18,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:54:18,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:54:18,212 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:54:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:54:18,213 INFO L85 PathProgramCache]: Analyzing trace with hash 60703281, now seen corresponding path program 1 times [2021-12-06 18:54:18,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:54:18,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899266082] [2021-12-06 18:54:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:18,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:54:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:18,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:54:18,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899266082] [2021-12-06 18:54:18,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899266082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:54:18,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988980964] [2021-12-06 18:54:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:18,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:54:18,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:54:18,968 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:54:18,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:54:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:54:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:54:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:20,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:54:20,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:20,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988980964] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:54:20,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:54:20,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13, 13] total 45 [2021-12-06 18:54:20,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134472256] [2021-12-06 18:54:20,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:54:20,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:54:20,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:54:20,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:54:20,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1831, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:54:20,781 INFO L87 Difference]: Start difference. First operand 11472 states and 14548 transitions. Second operand has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 18:54:27,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:54:27,124 INFO L93 Difference]: Finished difference Result 21229 states and 26365 transitions. [2021-12-06 18:54:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-12-06 18:54:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-12-06 18:54:27,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:54:27,140 INFO L225 Difference]: With dead ends: 21229 [2021-12-06 18:54:27,140 INFO L226 Difference]: Without dead ends: 16613 [2021-12-06 18:54:27,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1194, Invalid=5448, Unknown=0, NotChecked=0, Total=6642 [2021-12-06 18:54:27,146 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 11797 mSDsluCounter, 36469 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11797 SdHoareTripleChecker+Valid, 38115 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:54:27,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11797 Valid, 38115 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 18:54:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16613 states. [2021-12-06 18:54:27,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16613 to 8716. [2021-12-06 18:54:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8716 states, 8714 states have (on average 1.2919439981638743) internal successors, (11258), 8715 states have internal predecessors, (11258), 0 states have call successors, (0), 0 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 18:54:27,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8716 states to 8716 states and 11258 transitions. [2021-12-06 18:54:27,967 INFO L78 Accepts]: Start accepts. Automaton has 8716 states and 11258 transitions. Word has length 71 [2021-12-06 18:54:27,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:54:27,968 INFO L470 AbstractCegarLoop]: Abstraction has 8716 states and 11258 transitions. [2021-12-06 18:54:27,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 0 states have call successors, (0), 0 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 18:54:27,968 INFO L276 IsEmpty]: Start isEmpty. Operand 8716 states and 11258 transitions. [2021-12-06 18:54:27,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-06 18:54:27,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:54:27,969 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:54:27,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:54:28,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 18:54:28,171 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:54:28,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:54:28,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1260888971, now seen corresponding path program 1 times [2021-12-06 18:54:28,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:54:28,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681108324] [2021-12-06 18:54:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:28,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:54:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:28,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:54:28,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681108324] [2021-12-06 18:54:28,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681108324] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:54:28,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922059026] [2021-12-06 18:54:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:54:28,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:54:28,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:54:28,466 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:54:28,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:54:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:54:28,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 18:54:28,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:54:29,230 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:29,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:54:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:54:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922059026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:54:30,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:54:30,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2021-12-06 18:54:30,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310902138] [2021-12-06 18:54:30,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:54:30,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 18:54:30,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:54:30,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 18:54:30,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:54:30,203 INFO L87 Difference]: Start difference. First operand 8716 states and 11258 transitions. Second operand has 36 states, 36 states have (on average 8.805555555555555) internal successors, (317), 36 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 18:55:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:55:07,657 INFO L93 Difference]: Finished difference Result 26027 states and 31325 transitions. [2021-12-06 18:55:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 230 states. [2021-12-06 18:55:07,657 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 8.805555555555555) internal successors, (317), 36 states have internal predecessors, (317), 0 states have call successors, (0), 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 116 [2021-12-06 18:55:07,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:55:07,674 INFO L225 Difference]: With dead ends: 26027 [2021-12-06 18:55:07,674 INFO L226 Difference]: Without dead ends: 20537 [2021-12-06 18:55:07,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26411 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=8370, Invalid=61062, Unknown=0, NotChecked=0, Total=69432 [2021-12-06 18:55:07,683 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 20256 mSDsluCounter, 26256 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20256 SdHoareTripleChecker+Valid, 27890 SdHoareTripleChecker+Invalid, 2961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:55:07,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20256 Valid, 27890 Invalid, 2961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 18:55:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20537 states. [2021-12-06 18:55:08,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20537 to 8847. [2021-12-06 18:55:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8847 states, 8845 states have (on average 1.2817410966647824) internal successors, (11337), 8846 states have internal predecessors, (11337), 0 states have call successors, (0), 0 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 18:55:08,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 11337 transitions. [2021-12-06 18:55:08,822 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 11337 transitions. Word has length 116 [2021-12-06 18:55:08,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:55:08,823 INFO L470 AbstractCegarLoop]: Abstraction has 8847 states and 11337 transitions. [2021-12-06 18:55:08,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.805555555555555) internal successors, (317), 36 states have internal predecessors, (317), 0 states have call successors, (0), 0 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 18:55:08,823 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 11337 transitions. [2021-12-06 18:55:08,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 18:55:08,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:55:08,825 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:55:08,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:55:09,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 18:55:09,026 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:55:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:55:09,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1396838599, now seen corresponding path program 1 times [2021-12-06 18:55:09,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:55:09,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25413402] [2021-12-06 18:55:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:09,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:55:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 22 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:09,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:55:09,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25413402] [2021-12-06 18:55:09,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25413402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:55:09,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765689622] [2021-12-06 18:55:09,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:55:09,233 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:55:09,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:55:09,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:55:09,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:55:09,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:55:09,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 18:55:09,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:55:11,123 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:11,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:55:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 30 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:55:13,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765689622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:55:13,542 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:55:13,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 23, 22] total 54 [2021-12-06 18:55:13,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792838936] [2021-12-06 18:55:13,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:55:13,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 18:55:13,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:55:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 18:55:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=2617, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:55:13,544 INFO L87 Difference]: Start difference. First operand 8847 states and 11337 transitions. Second operand has 54 states, 54 states have (on average 6.055555555555555) internal successors, (327), 54 states have internal predecessors, (327), 0 states have call successors, (0), 0 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 18:56:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:56:35,374 INFO L93 Difference]: Finished difference Result 18397 states and 22562 transitions. [2021-12-06 18:56:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 252 states. [2021-12-06 18:56:35,375 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 6.055555555555555) internal successors, (327), 54 states have internal predecessors, (327), 0 states have call successors, (0), 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 117 [2021-12-06 18:56:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:56:35,386 INFO L225 Difference]: With dead ends: 18397 [2021-12-06 18:56:35,386 INFO L226 Difference]: Without dead ends: 13093 [2021-12-06 18:56:35,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31869 ImplicationChecksByTransitivity, 76.7s TimeCoverageRelationStatistics Valid=12544, Invalid=79568, Unknown=0, NotChecked=0, Total=92112 [2021-12-06 18:56:35,393 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 27819 mSDsluCounter, 29669 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 1250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27819 SdHoareTripleChecker+Valid, 31260 SdHoareTripleChecker+Invalid, 4378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1250 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:56:35,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27819 Valid, 31260 Invalid, 4378 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1250 Valid, 3128 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2021-12-06 18:56:35,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13093 states. [2021-12-06 18:56:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13093 to 5987. [2021-12-06 18:56:36,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5987 states, 5985 states have (on average 1.3208020050125313) internal successors, (7905), 5986 states have internal predecessors, (7905), 0 states have call successors, (0), 0 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 18:56:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5987 states to 5987 states and 7905 transitions. [2021-12-06 18:56:36,360 INFO L78 Accepts]: Start accepts. Automaton has 5987 states and 7905 transitions. Word has length 117 [2021-12-06 18:56:36,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:56:36,360 INFO L470 AbstractCegarLoop]: Abstraction has 5987 states and 7905 transitions. [2021-12-06 18:56:36,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 6.055555555555555) internal successors, (327), 54 states have internal predecessors, (327), 0 states have call successors, (0), 0 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 18:56:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 5987 states and 7905 transitions. [2021-12-06 18:56:36,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 18:56:36,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:56:36,362 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:56:36,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:56:36,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-06 18:56:36,564 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:56:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:56:36,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1558793474, now seen corresponding path program 1 times [2021-12-06 18:56:36,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:56:36,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876850778] [2021-12-06 18:56:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:56:36,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:56:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:56:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:56:36,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:56:36,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876850778] [2021-12-06 18:56:36,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876850778] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:56:36,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313816794] [2021-12-06 18:56:36,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:56:36,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:56:36,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:56:36,835 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:56:36,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:56:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:56:36,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-06 18:56:36,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:56:38,128 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 44 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:56:38,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:56:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 40 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:56:39,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313816794] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:56:39,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:56:39,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2021-12-06 18:56:39,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288545300] [2021-12-06 18:56:39,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:56:39,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 18:56:39,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:56:39,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 18:56:39,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-12-06 18:56:39,785 INFO L87 Difference]: Start difference. First operand 5987 states and 7905 transitions. Second operand has 31 states, 31 states have (on average 9.483870967741936) internal successors, (294), 30 states have internal predecessors, (294), 0 states have call successors, (0), 0 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 18:56:44,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:56:44,938 INFO L93 Difference]: Finished difference Result 10868 states and 13628 transitions. [2021-12-06 18:56:44,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 18:56:44,939 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 9.483870967741936) internal successors, (294), 30 states have internal predecessors, (294), 0 states have call successors, (0), 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 117 [2021-12-06 18:56:44,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:56:44,944 INFO L225 Difference]: With dead ends: 10868 [2021-12-06 18:56:44,944 INFO L226 Difference]: Without dead ends: 7893 [2021-12-06 18:56:44,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=671, Invalid=2409, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 18:56:44,947 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 15546 mSDsluCounter, 13990 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15546 SdHoareTripleChecker+Valid, 15554 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:56:44,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15546 Valid, 15554 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 816 Invalid, 0 Unknown, 3 Unchecked, 1.0s Time] [2021-12-06 18:56:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7893 states. [2021-12-06 18:56:45,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7893 to 5987. [2021-12-06 18:56:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5987 states, 5985 states have (on average 1.3151211361737678) internal successors, (7871), 5986 states have internal predecessors, (7871), 0 states have call successors, (0), 0 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 18:56:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5987 states to 5987 states and 7871 transitions. [2021-12-06 18:56:46,004 INFO L78 Accepts]: Start accepts. Automaton has 5987 states and 7871 transitions. Word has length 117 [2021-12-06 18:56:46,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:56:46,004 INFO L470 AbstractCegarLoop]: Abstraction has 5987 states and 7871 transitions. [2021-12-06 18:56:46,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.483870967741936) internal successors, (294), 30 states have internal predecessors, (294), 0 states have call successors, (0), 0 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 18:56:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 5987 states and 7871 transitions. [2021-12-06 18:56:46,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-06 18:56:46,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:56:46,006 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:56:46,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:56:46,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 18:56:46,207 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:56:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:56:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1948045308, now seen corresponding path program 1 times [2021-12-06 18:56:46,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:56:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146268031] [2021-12-06 18:56:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:56:46,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:56:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:56:46,599 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 34 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:56:46,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:56:46,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146268031] [2021-12-06 18:56:46,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146268031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:56:46,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117786661] [2021-12-06 18:56:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:56:46,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:56:46,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:56:46,600 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:56:46,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6302fc7-4b75-4bd4-8616-ebfc1d013297/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:56:46,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:56:46,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 18:56:46,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:56:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:56:48,246 INFO L328 TraceCheckSpWp]: Computing backward predicates...