./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/process_queue.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-data/process_queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8 --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 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:55:45,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:55:45,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:55:45,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:55:45,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:55:45,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:55:45,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:55:45,808 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:55:45,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:55:45,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:55:45,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:55:45,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:55:45,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:55:45,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:55:45,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:55:45,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:55:45,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:55:45,835 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:55:45,837 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:55:45,839 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:55:45,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:55:45,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:55:45,844 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:55:45,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:55:45,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:55:45,849 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:55:45,849 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:55:45,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:55:45,851 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:55:45,852 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:55:45,853 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:55:45,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:55:45,855 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:55:45,856 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:55:45,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:55:45,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:55:45,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:55:45,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:55:45,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:55:45,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:55:45,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:55:45,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:55:45,887 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:55:45,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:55:45,900 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:55:45,901 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:55:45,901 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:55:45,902 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:55:45,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:55:45,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:55:45,903 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:55:45,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:55:45,903 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:55:45,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:55:45,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:55:45,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:55:45,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:55:45,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:55:45,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:55:45,906 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:55:45,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:55:45,907 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:55:45,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:55:45,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:55:45,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:55:45,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:55:45,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:55:45,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:55:45,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:55:45,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:55:45,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:55:45,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:55:45,909 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:55:45,910 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:55:45,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:55:45,910 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_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c [2022-11-16 11:55:46,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:55:46,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:55:46,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:55:46,267 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:55:46,268 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:55:46,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/heap-data/process_queue.i [2022-11-16 11:55:46,366 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/data/32db186a4/a65a3dd155f84f2295110e00ca5558b4/FLAG3e1da4754 [2022-11-16 11:55:46,936 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:55:46,937 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/sv-benchmarks/c/heap-data/process_queue.i [2022-11-16 11:55:46,952 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/data/32db186a4/a65a3dd155f84f2295110e00ca5558b4/FLAG3e1da4754 [2022-11-16 11:55:47,214 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/data/32db186a4/a65a3dd155f84f2295110e00ca5558b4 [2022-11-16 11:55:47,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:55:47,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:55:47,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:55:47,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:55:47,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:55:47,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b4b7d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47, skipping insertion in model container [2022-11-16 11:55:47,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:55:47,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:55:47,710 WARN L229 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_72bcbb10-ef7e-4861-b04e-828c40185fc9/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2022-11-16 11:55:47,734 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:55:47,750 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:55:47,813 WARN L229 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_72bcbb10-ef7e-4861-b04e-828c40185fc9/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2022-11-16 11:55:47,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:55:47,864 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:55:47,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47 WrapperNode [2022-11-16 11:55:47,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:55:47,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:55:47,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:55:47,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:55:47,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,935 INFO L138 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 111 [2022-11-16 11:55:47,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:55:47,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:55:47,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:55:47,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:55:47,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,981 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:47,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:55:47,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:55:47,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:55:47,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:55:47,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (1/1) ... [2022-11-16 11:55:48,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:55:48,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:55:48,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:55:48,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:55:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:55:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:55:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:55:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:55:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:55:48,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:55:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:55:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:55:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 11:55:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:55:48,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:55:48,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:55:48,240 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:55:48,244 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:55:48,596 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:55:48,605 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:55:48,613 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:55:48,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:55:48 BoogieIcfgContainer [2022-11-16 11:55:48,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:55:48,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:55:48,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:55:48,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:55:48,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:55:47" (1/3) ... [2022-11-16 11:55:48,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ab4035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:55:48, skipping insertion in model container [2022-11-16 11:55:48,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:55:47" (2/3) ... [2022-11-16 11:55:48,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57ab4035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:55:48, skipping insertion in model container [2022-11-16 11:55:48,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:55:48" (3/3) ... [2022-11-16 11:55:48,642 INFO L112 eAbstractionObserver]: Analyzing ICFG process_queue.i [2022-11-16 11:55:48,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:55:48,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:55:48,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:55:48,774 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@8ec1a6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:55:48,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:55:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:55:48,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:48,789 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:48,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:48,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2060272908, now seen corresponding path program 1 times [2022-11-16 11:55:48,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:48,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841410682] [2022-11-16 11:55:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:48,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:49,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:49,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:49,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841410682] [2022-11-16 11:55:49,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841410682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:49,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:49,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:55:49,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340890998] [2022-11-16 11:55:49,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:49,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:55:49,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:49,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:55:49,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:55:49,355 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:49,421 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2022-11-16 11:55:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:55:49,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-16 11:55:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:49,436 INFO L225 Difference]: With dead ends: 51 [2022-11-16 11:55:49,436 INFO L226 Difference]: Without dead ends: 23 [2022-11-16 11:55:49,440 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:55:49,445 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 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 [2022-11-16 11:55:49,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:55:49,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-16 11:55:49,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-16 11:55:49,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:49,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-11-16 11:55:49,491 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 11 [2022-11-16 11:55:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:49,492 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-11-16 11:55:49,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-11-16 11:55:49,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:55:49,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:49,494 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:49,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:55:49,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:49,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1911586027, now seen corresponding path program 1 times [2022-11-16 11:55:49,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:49,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364550727] [2022-11-16 11:55:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:49,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:49,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:49,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364550727] [2022-11-16 11:55:49,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364550727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:49,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:49,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:55:49,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482238850] [2022-11-16 11:55:49,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:49,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:55:49,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:49,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:55:49,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:55:49,702 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:49,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:49,822 INFO L93 Difference]: Finished difference Result 56 states and 74 transitions. [2022-11-16 11:55:49,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:55:49,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-16 11:55:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:49,826 INFO L225 Difference]: With dead ends: 56 [2022-11-16 11:55:49,826 INFO L226 Difference]: Without dead ends: 35 [2022-11-16 11:55:49,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:55:49,830 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:49,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 86 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:55:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-16 11:55:49,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-11-16 11:55:49,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 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) [2022-11-16 11:55:49,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-11-16 11:55:49,850 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 11 [2022-11-16 11:55:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:49,851 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-11-16 11:55:49,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-11-16 11:55:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:55:49,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:49,856 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:49,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:55:49,859 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash 459687026, now seen corresponding path program 1 times [2022-11-16 11:55:49,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:49,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535331834] [2022-11-16 11:55:49,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:49,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:51,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:51,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535331834] [2022-11-16 11:55:51,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535331834] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:51,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:51,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:55:51,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880445008] [2022-11-16 11:55:51,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:51,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:55:51,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:51,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:55:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:55:51,040 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:51,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:51,349 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2022-11-16 11:55:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:55:51,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-16 11:55:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:51,354 INFO L225 Difference]: With dead ends: 74 [2022-11-16 11:55:51,354 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 11:55:51,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:55:51,356 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:51,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 105 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:55:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 11:55:51,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 51. [2022-11-16 11:55:51,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.36) internal successors, (68), 50 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) [2022-11-16 11:55:51,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2022-11-16 11:55:51,381 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 11 [2022-11-16 11:55:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:51,388 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2022-11-16 11:55:51,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2022-11-16 11:55:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:55:51,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:51,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:51,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:55:51,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:51,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:51,397 INFO L85 PathProgramCache]: Analyzing trace with hash 608373907, now seen corresponding path program 1 times [2022-11-16 11:55:51,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:51,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203148637] [2022-11-16 11:55:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:51,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:51,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:51,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:51,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203148637] [2022-11-16 11:55:51,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203148637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:51,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:51,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:55:51,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458371987] [2022-11-16 11:55:51,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:51,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:55:51,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:51,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:55:51,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:55:51,493 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:51,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:51,605 INFO L93 Difference]: Finished difference Result 106 states and 140 transitions. [2022-11-16 11:55:51,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:55:51,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-11-16 11:55:51,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:51,607 INFO L225 Difference]: With dead ends: 106 [2022-11-16 11:55:51,607 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 11:55:51,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:55:51,609 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 23 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:51,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:55:51,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 11:55:51,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2022-11-16 11:55:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3333333333333333) internal successors, (64), 48 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) [2022-11-16 11:55:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2022-11-16 11:55:51,625 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 11 [2022-11-16 11:55:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:51,626 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2022-11-16 11:55:51,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2022-11-16 11:55:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 11:55:51,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:51,628 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:51,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:55:51,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:51,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2110602732, now seen corresponding path program 1 times [2022-11-16 11:55:51,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:51,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144561678] [2022-11-16 11:55:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:52,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144561678] [2022-11-16 11:55:52,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144561678] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:55:52,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861070533] [2022-11-16 11:55:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:52,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:55:52,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:55:52,387 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:55:52,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:55:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:52,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 11:55:52,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:55:52,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:55:52,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:55:52,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:55:52,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-16 11:55:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:55:52,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:55:52,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-16 11:55:52,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-16 11:55:52,775 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 11:55:52,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-16 11:55:52,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-16 11:55:52,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-11-16 11:55:52,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-11-16 11:55:52,980 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-16 11:55:52,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2022-11-16 11:55:52,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 12 [2022-11-16 11:55:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:53,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:55:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:53,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861070533] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:55:53,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:55:53,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-16 11:55:53,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632317339] [2022-11-16 11:55:53,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:55:53,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:55:53,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:55:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:55:53,448 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:53,790 INFO L93 Difference]: Finished difference Result 121 states and 160 transitions. [2022-11-16 11:55:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:55:53,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 11:55:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:53,795 INFO L225 Difference]: With dead ends: 121 [2022-11-16 11:55:53,795 INFO L226 Difference]: Without dead ends: 83 [2022-11-16 11:55:53,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:55:53,797 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 41 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:53,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 225 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-11-16 11:55:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-16 11:55:53,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2022-11-16 11:55:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.320754716981132) internal successors, (70), 53 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:53,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-11-16 11:55:53,808 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 14 [2022-11-16 11:55:53,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:53,809 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-11-16 11:55:53,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:53,809 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-11-16 11:55:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 11:55:53,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:53,810 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:53,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:55:54,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:55:54,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:54,018 INFO L85 PathProgramCache]: Analyzing trace with hash 969563825, now seen corresponding path program 1 times [2022-11-16 11:55:54,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:54,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106226519] [2022-11-16 11:55:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:54,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:55:54,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:54,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106226519] [2022-11-16 11:55:54,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106226519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:55:54,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:55:54,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:55:54,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678848751] [2022-11-16 11:55:54,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:55:54,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:55:54,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:54,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:55:54,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:55:54,292 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:54,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:54,373 INFO L93 Difference]: Finished difference Result 117 states and 155 transitions. [2022-11-16 11:55:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:55:54,374 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 11:55:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:54,375 INFO L225 Difference]: With dead ends: 117 [2022-11-16 11:55:54,375 INFO L226 Difference]: Without dead ends: 79 [2022-11-16 11:55:54,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:55:54,379 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:54,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 75 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:55:54,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-16 11:55:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2022-11-16 11:55:54,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 69 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2022-11-16 11:55:54,410 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 19 [2022-11-16 11:55:54,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:54,411 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2022-11-16 11:55:54,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2022-11-16 11:55:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 11:55:54,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:54,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:54,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:55:54,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:54,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1377311315, now seen corresponding path program 1 times [2022-11-16 11:55:54,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:54,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489037015] [2022-11-16 11:55:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:55:55,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:55:55,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489037015] [2022-11-16 11:55:55,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489037015] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:55:55,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648984378] [2022-11-16 11:55:55,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:55,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:55:55,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:55:55,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:55:55,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:55:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:55:55,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-16 11:55:55,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:55:55,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2022-11-16 11:55:55,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:55:55,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:55:55,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:55:55,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:55:55,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:55:55,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:55:55,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:55:55,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:55:55,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:55:55,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:55:55,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:55:55,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-16 11:55:55,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:55:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:55:55,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:55:56,029 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:55:56,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 35 [2022-11-16 11:55:56,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-16 11:55:56,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 11:55:56,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:55:56,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648984378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:55:56,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:55:56,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-16 11:55:56,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801828886] [2022-11-16 11:55:56,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:55:56,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:55:56,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:55:56,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:55:56,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:55:56,168 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:58,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:55:58,244 INFO L93 Difference]: Finished difference Result 323 states and 428 transitions. [2022-11-16 11:55:58,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 11:55:58,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 11:55:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:55:58,247 INFO L225 Difference]: With dead ends: 323 [2022-11-16 11:55:58,247 INFO L226 Difference]: Without dead ends: 269 [2022-11-16 11:55:58,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=529, Invalid=1823, Unknown=0, NotChecked=0, Total=2352 [2022-11-16 11:55:58,249 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 549 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:55:58,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 415 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:55:58,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-16 11:55:58,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 116. [2022-11-16 11:55:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.3043478260869565) internal successors, (150), 115 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:58,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2022-11-16 11:55:58,270 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 22 [2022-11-16 11:55:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:55:58,271 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2022-11-16 11:55:58,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:55:58,271 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2022-11-16 11:55:58,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:55:58,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:55:58,272 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:55:58,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:55:58,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:55:58,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:55:58,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:55:58,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1662719123, now seen corresponding path program 2 times [2022-11-16 11:55:58,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:55:58,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700978876] [2022-11-16 11:55:58,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:55:58,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:55:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:00,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700978876] [2022-11-16 11:56:00,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700978876] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:00,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038408707] [2022-11-16 11:56:00,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:56:00,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:00,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:00,563 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:00,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:56:00,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:56:00,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:00,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-16 11:56:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:00,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:56:00,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:00,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:00,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:56:00,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:56:00,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:00,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:00,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:56:00,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:56:00,876 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2022-11-16 11:56:00,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-11-16 11:56:01,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:01,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:01,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2022-11-16 11:56:01,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:01,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:01,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 45 [2022-11-16 11:56:01,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:01,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:01,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2022-11-16 11:56:01,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 36 [2022-11-16 11:56:01,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2022-11-16 11:56:01,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:56:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:01,384 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2022-11-16 11:56:01,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2022-11-16 11:56:01,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:56:01,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:56:01,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:01,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:56:01,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 98 treesize of output 50 [2022-11-16 11:56:01,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:01,652 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 11:56:01,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-11-16 11:56:01,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:56:01,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:01,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:01,801 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_513 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (v_ArrVal_517 (Array Int Int)) (v_ArrVal_518 (Array Int Int)) (v_ArrVal_520 (Array Int Int)) (v_ArrVal_524 Int) (v_ArrVal_522 (Array Int Int))) (or (not (< v_ArrVal_524 |c_#StackHeapBarrier|)) (not (= (select |c_#valid| v_ArrVal_524) 0)) (< 0 (select (select (store (store |c_#memory_int| v_ArrVal_524 v_ArrVal_514) |c_ULTIMATE.start_main_~#queue~0#1.base| v_ArrVal_518) (select (select (store (store |c_#memory_$Pointer$.base| v_ArrVal_524 (store v_ArrVal_517 8 (select (select (store |c_#memory_$Pointer$.base| v_ArrVal_524 v_ArrVal_517) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.base| v_ArrVal_524 v_ArrVal_522) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| v_ArrVal_524)) v_ArrVal_524) 8)) (+ (select (select (store (store |c_#memory_$Pointer$.offset| v_ArrVal_524 (store v_ArrVal_520 8 (select (select (store |c_#memory_$Pointer$.offset| v_ArrVal_524 v_ArrVal_520) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.offset| v_ArrVal_524 v_ArrVal_513) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| 0)) v_ArrVal_524) 8) 4))))) is different from false [2022-11-16 11:56:02,043 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:56:02,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 811 treesize of output 748 [2022-11-16 11:56:02,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 275 [2022-11-16 11:56:02,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 614 treesize of output 486 [2022-11-16 11:56:04,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 479 treesize of output 473 [2022-11-16 11:56:04,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 461 treesize of output 459 [2022-11-16 11:56:04,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 431 treesize of output 425 [2022-11-16 11:56:04,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 448 treesize of output 442 [2022-11-16 11:56:04,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 448 treesize of output 446 [2022-11-16 11:56:04,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 446 treesize of output 442 [2022-11-16 11:56:04,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 464 treesize of output 460 [2022-11-16 11:56:04,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 460 treesize of output 456 [2022-11-16 11:56:04,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 461 treesize of output 459 [2022-11-16 11:56:05,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 466 treesize of output 462 [2022-11-16 11:56:05,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 454 treesize of output 450 [2022-11-16 11:56:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 8 not checked. [2022-11-16 11:56:05,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038408707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:05,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:05,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 27 [2022-11-16 11:56:05,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710315623] [2022-11-16 11:56:05,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:05,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:56:05,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:05,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:56:05,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=553, Unknown=3, NotChecked=48, Total=702 [2022-11-16 11:56:05,360 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 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) [2022-11-16 11:56:16,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:16,657 INFO L93 Difference]: Finished difference Result 747 states and 999 transitions. [2022-11-16 11:56:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-16 11:56:16,657 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 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 25 [2022-11-16 11:56:16,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:16,660 INFO L225 Difference]: With dead ends: 747 [2022-11-16 11:56:16,660 INFO L226 Difference]: Without dead ends: 745 [2022-11-16 11:56:16,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 48 SyntacticMatches, 20 SemanticMatches, 85 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 2834 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1381, Invalid=5926, Unknown=7, NotChecked=168, Total=7482 [2022-11-16 11:56:16,664 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 451 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:16,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 1043 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 712 Invalid, 0 Unknown, 541 Unchecked, 1.5s Time] [2022-11-16 11:56:16,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-11-16 11:56:16,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 545. [2022-11-16 11:56:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 1.3143382352941178) internal successors, (715), 544 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 715 transitions. [2022-11-16 11:56:16,741 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 715 transitions. Word has length 25 [2022-11-16 11:56:16,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:16,741 INFO L495 AbstractCegarLoop]: Abstraction has 545 states and 715 transitions. [2022-11-16 11:56:16,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 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) [2022-11-16 11:56:16,741 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 715 transitions. [2022-11-16 11:56:16,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:56:16,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:16,743 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:16,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:16,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:16,949 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash 211481171, now seen corresponding path program 3 times [2022-11-16 11:56:16,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130061714] [2022-11-16 11:56:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:16,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:18,880 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:18,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:18,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130061714] [2022-11-16 11:56:18,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130061714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:18,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958112576] [2022-11-16 11:56:18,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:56:18,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:18,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:18,883 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:18,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:56:19,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:56:19,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:19,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-16 11:56:19,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:19,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:56:19,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:19,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:19,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-16 11:56:19,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:19,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:19,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-16 11:56:19,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-16 11:56:19,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:56:19,865 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2022-11-16 11:56:19,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-11-16 11:56:19,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-16 11:56:19,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:56:20,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:20,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:20,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:20,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2022-11-16 11:56:20,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:20,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:20,237 INFO L321 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2022-11-16 11:56:20,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 56 [2022-11-16 11:56:20,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 39 [2022-11-16 11:56:20,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-16 11:56:20,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:56:20,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:56:20,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:20,284 INFO L321 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2022-11-16 11:56:20,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2022-11-16 11:56:20,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:56:20,668 INFO L321 Elim1Store]: treesize reduction 67, result has 9.5 percent of original size [2022-11-16 11:56:20,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 153 treesize of output 83 [2022-11-16 11:56:20,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:20,690 INFO L321 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2022-11-16 11:56:20,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 29 [2022-11-16 11:56:20,697 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:56:20,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:56:26,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958112576] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:26,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:26,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 21 [2022-11-16 11:56:26,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412174838] [2022-11-16 11:56:26,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:26,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:56:26,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:26,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:56:26,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:56:26,085 INFO L87 Difference]: Start difference. First operand 545 states and 715 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:32,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:32,050 INFO L93 Difference]: Finished difference Result 2191 states and 2897 transitions. [2022-11-16 11:56:32,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 11:56:32,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-16 11:56:32,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:32,058 INFO L225 Difference]: With dead ends: 2191 [2022-11-16 11:56:32,058 INFO L226 Difference]: Without dead ends: 1703 [2022-11-16 11:56:32,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=357, Invalid=1899, Unknown=0, NotChecked=0, Total=2256 [2022-11-16 11:56:32,062 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 473 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:32,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 633 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 286 Invalid, 0 Unknown, 129 Unchecked, 0.9s Time] [2022-11-16 11:56:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-11-16 11:56:32,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1280. [2022-11-16 11:56:32,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1279 states have (on average 1.2978889757623142) internal successors, (1660), 1279 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1660 transitions. [2022-11-16 11:56:32,266 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1660 transitions. Word has length 28 [2022-11-16 11:56:32,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:32,266 INFO L495 AbstractCegarLoop]: Abstraction has 1280 states and 1660 transitions. [2022-11-16 11:56:32,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 21 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:32,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1660 transitions. [2022-11-16 11:56:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:56:32,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:32,268 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:56:32,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:32,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:32,475 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:32,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1324510600, now seen corresponding path program 1 times [2022-11-16 11:56:32,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:32,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438580881] [2022-11-16 11:56:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:32,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:56:32,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:32,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438580881] [2022-11-16 11:56:32,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438580881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:32,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114761398] [2022-11-16 11:56:32,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:32,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:32,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:32,571 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:32,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:56:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:32,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:56:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:56:32,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:32,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:56:32,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114761398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:32,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:32,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-16 11:56:32,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659557333] [2022-11-16 11:56:32,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:32,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:56:32,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:32,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:56:32,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:56:32,844 INFO L87 Difference]: Start difference. First operand 1280 states and 1660 transitions. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:33,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:33,378 INFO L93 Difference]: Finished difference Result 3325 states and 4355 transitions. [2022-11-16 11:56:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:56:33,379 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 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 29 [2022-11-16 11:56:33,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:33,388 INFO L225 Difference]: With dead ends: 3325 [2022-11-16 11:56:33,389 INFO L226 Difference]: Without dead ends: 2088 [2022-11-16 11:56:33,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:56:33,391 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 99 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:33,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 145 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:56:33,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2022-11-16 11:56:33,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 2000. [2022-11-16 11:56:33,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 1.2676338169084542) internal successors, (2534), 1999 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2534 transitions. [2022-11-16 11:56:33,707 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 2534 transitions. Word has length 29 [2022-11-16 11:56:33,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:33,707 INFO L495 AbstractCegarLoop]: Abstraction has 2000 states and 2534 transitions. [2022-11-16 11:56:33,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 2534 transitions. [2022-11-16 11:56:33,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:56:33,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:33,715 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:33,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:33,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:56:33,920 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:33,921 INFO L85 PathProgramCache]: Analyzing trace with hash -313393350, now seen corresponding path program 1 times [2022-11-16 11:56:33,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:33,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678780324] [2022-11-16 11:56:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:33,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:34,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:34,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678780324] [2022-11-16 11:56:34,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678780324] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:34,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569689445] [2022-11-16 11:56:34,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:34,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:34,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:34,627 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:34,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:56:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-16 11:56:34,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:34,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:56:34,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:34,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:34,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:56:34,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:34,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:34,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:56:34,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2022-11-16 11:56:34,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:56:34,917 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 11:56:34,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-16 11:56:34,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:56:34,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:56:35,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:56:35,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-16 11:56:35,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:56:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:56:35,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:35,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:56:35,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 35 [2022-11-16 11:56:35,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-11-16 11:56:35,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 11:56:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:56:35,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569689445] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:35,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:35,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-11-16 11:56:35,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217183585] [2022-11-16 11:56:35,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:35,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:56:35,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:35,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:56:35,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:56:35,266 INFO L87 Difference]: Start difference. First operand 2000 states and 2534 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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) [2022-11-16 11:56:36,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:36,033 INFO L93 Difference]: Finished difference Result 3278 states and 4145 transitions. [2022-11-16 11:56:36,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:56:36,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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 29 [2022-11-16 11:56:36,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:36,042 INFO L225 Difference]: With dead ends: 3278 [2022-11-16 11:56:36,043 INFO L226 Difference]: Without dead ends: 2280 [2022-11-16 11:56:36,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:56:36,045 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 99 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:36,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 164 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 124 Invalid, 0 Unknown, 32 Unchecked, 0.3s Time] [2022-11-16 11:56:36,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2022-11-16 11:56:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2002. [2022-11-16 11:56:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 1.2673663168415792) internal successors, (2536), 2001 states have internal predecessors, (2536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 2536 transitions. [2022-11-16 11:56:36,372 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 2536 transitions. Word has length 29 [2022-11-16 11:56:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:36,372 INFO L495 AbstractCegarLoop]: Abstraction has 2002 states and 2536 transitions. [2022-11-16 11:56:36,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 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) [2022-11-16 11:56:36,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 2536 transitions. [2022-11-16 11:56:36,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:56:36,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:36,399 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:56:36,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 11:56:36,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:56:36,604 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:36,605 INFO L85 PathProgramCache]: Analyzing trace with hash -190827821, now seen corresponding path program 1 times [2022-11-16 11:56:36,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:36,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716809527] [2022-11-16 11:56:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:37,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:37,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:37,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716809527] [2022-11-16 11:56:37,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716809527] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:37,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974628779] [2022-11-16 11:56:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:37,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:37,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:37,134 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:37,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:56:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:37,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-16 11:56:37,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:37,373 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 11:56:37,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 11:56:37,415 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 11:56:37,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 11:56:37,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:56:37,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:56:37,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:56:37,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:56:37,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 15 [2022-11-16 11:56:37,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 11:56:37,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 15 [2022-11-16 11:56:37,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 11:56:37,839 INFO L321 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2022-11-16 11:56:37,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 85 treesize of output 61 [2022-11-16 11:56:37,867 INFO L321 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2022-11-16 11:56:37,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 45 [2022-11-16 11:56:38,179 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:56:38,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 85 [2022-11-16 11:56:38,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:56:38,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 72 [2022-11-16 11:56:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:38,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:38,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974628779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:38,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:38,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 20 [2022-11-16 11:56:38,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3880722] [2022-11-16 11:56:38,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:38,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:56:38,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:38,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:56:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:56:38,705 INFO L87 Difference]: Start difference. First operand 2002 states and 2536 transitions. Second operand has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:47,425 INFO L93 Difference]: Finished difference Result 6891 states and 8985 transitions. [2022-11-16 11:56:47,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-11-16 11:56:47,426 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-16 11:56:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:47,444 INFO L225 Difference]: With dead ends: 6891 [2022-11-16 11:56:47,444 INFO L226 Difference]: Without dead ends: 4518 [2022-11-16 11:56:47,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6211 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2178, Invalid=13074, Unknown=0, NotChecked=0, Total=15252 [2022-11-16 11:56:47,453 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 1048 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 1501 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:47,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1048 Valid, 1501 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 982 Invalid, 0 Unknown, 107 Unchecked, 2.9s Time] [2022-11-16 11:56:47,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2022-11-16 11:56:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 2508. [2022-11-16 11:56:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2507 states have (on average 1.3067411248504188) internal successors, (3276), 2507 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 3276 transitions. [2022-11-16 11:56:47,865 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 3276 transitions. Word has length 30 [2022-11-16 11:56:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:47,865 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 3276 transitions. [2022-11-16 11:56:47,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.9) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:47,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 3276 transitions. [2022-11-16 11:56:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:56:47,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:47,867 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:56:47,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:48,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:56:48,074 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:48,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash -583854831, now seen corresponding path program 1 times [2022-11-16 11:56:48,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:48,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47922426] [2022-11-16 11:56:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-16 11:56:48,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:48,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47922426] [2022-11-16 11:56:48,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47922426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:56:48,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:56:48,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:56:48,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544738790] [2022-11-16 11:56:48,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:56:48,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:56:48,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:48,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:56:48,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:56:48,192 INFO L87 Difference]: Start difference. First operand 2508 states and 3276 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:48,581 INFO L93 Difference]: Finished difference Result 6274 states and 8159 transitions. [2022-11-16 11:56:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:56:48,582 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-16 11:56:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:48,597 INFO L225 Difference]: With dead ends: 6274 [2022-11-16 11:56:48,597 INFO L226 Difference]: Without dead ends: 3908 [2022-11-16 11:56:48,601 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:56:48,602 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:48,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 75 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:56:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3908 states. [2022-11-16 11:56:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3908 to 2566. [2022-11-16 11:56:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2566 states, 2565 states have (on average 1.3001949317738792) internal successors, (3335), 2565 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 3335 transitions. [2022-11-16 11:56:49,046 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 3335 transitions. Word has length 30 [2022-11-16 11:56:49,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:49,046 INFO L495 AbstractCegarLoop]: Abstraction has 2566 states and 3335 transitions. [2022-11-16 11:56:49,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:49,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 3335 transitions. [2022-11-16 11:56:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 11:56:49,048 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:49,048 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:56:49,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 11:56:49,048 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:49,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1070079280, now seen corresponding path program 1 times [2022-11-16 11:56:49,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:49,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477286973] [2022-11-16 11:56:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:49,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:49,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477286973] [2022-11-16 11:56:49,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477286973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:49,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570590473] [2022-11-16 11:56:49,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:49,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:49,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:49,699 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:49,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:56:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:49,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-16 11:56:49,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:49,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:56:49,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:49,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2022-11-16 11:56:49,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 19 [2022-11-16 11:56:49,964 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-16 11:56:49,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-16 11:56:50,301 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-16 11:56:50,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 53 [2022-11-16 11:56:50,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2022-11-16 11:56:50,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-11-16 11:56:50,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2022-11-16 11:56:50,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:56:50,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:56:50,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:50,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:50,384 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_choose_next_~node~0#1.offset| 8))) (and (forall ((v_ArrVal_1109 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_choose_next_~q#1.base| v_ArrVal_1109) |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse0) 0)) (forall ((v_ArrVal_1108 (Array Int Int))) (= 0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_choose_next_~q#1.base| v_ArrVal_1108) |c_ULTIMATE.start_choose_next_~node~0#1.base|) .cse0))))) is different from false [2022-11-16 11:56:50,406 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|)) (.cse1 (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|) 8))) (and (forall ((v_ArrVal_1108 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~#queue~0#1.base| v_ArrVal_1108) .cse0) .cse1) 0)) (forall ((v_ArrVal_1109 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~#queue~0#1.base| v_ArrVal_1109) .cse0) .cse1) 0)))) is different from false [2022-11-16 11:56:50,681 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-16 11:56:50,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 76 [2022-11-16 11:56:50,710 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-16 11:56:50,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 60 [2022-11-16 11:56:50,727 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-16 11:56:50,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 56 [2022-11-16 11:56:50,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-11-16 11:56:50,745 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-11-16 11:56:50,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 66 [2022-11-16 11:56:50,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2022-11-16 11:56:50,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-16 11:56:50,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570590473] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:50,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:50,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-16 11:56:50,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044534967] [2022-11-16 11:56:50,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:50,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:56:50,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:50,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:56:50,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=347, Unknown=2, NotChecked=78, Total=506 [2022-11-16 11:56:50,834 INFO L87 Difference]: Start difference. First operand 2566 states and 3335 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:51,766 INFO L93 Difference]: Finished difference Result 3809 states and 4942 transitions. [2022-11-16 11:56:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:56:51,766 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 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 33 [2022-11-16 11:56:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:51,773 INFO L225 Difference]: With dead ends: 3809 [2022-11-16 11:56:51,773 INFO L226 Difference]: Without dead ends: 2730 [2022-11-16 11:56:51,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=158, Invalid=603, Unknown=3, NotChecked=106, Total=870 [2022-11-16 11:56:51,775 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 137 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:51,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 344 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 120 Invalid, 0 Unknown, 167 Unchecked, 0.3s Time] [2022-11-16 11:56:51,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2730 states. [2022-11-16 11:56:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2730 to 2704. [2022-11-16 11:56:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2704 states, 2703 states have (on average 1.2978172401035886) internal successors, (3508), 2703 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:52,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2704 states to 2704 states and 3508 transitions. [2022-11-16 11:56:52,100 INFO L78 Accepts]: Start accepts. Automaton has 2704 states and 3508 transitions. Word has length 33 [2022-11-16 11:56:52,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:52,101 INFO L495 AbstractCegarLoop]: Abstraction has 2704 states and 3508 transitions. [2022-11-16 11:56:52,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 23 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:52,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2704 states and 3508 transitions. [2022-11-16 11:56:52,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 11:56:52,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:52,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:52,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:52,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 11:56:52,308 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:52,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1610537933, now seen corresponding path program 1 times [2022-11-16 11:56:52,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:52,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26360654] [2022-11-16 11:56:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:52,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:52,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:56:52,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:52,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26360654] [2022-11-16 11:56:52,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26360654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:52,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763078295] [2022-11-16 11:56:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:52,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:52,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:52,476 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:52,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:56:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:52,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 11:56:52,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:52,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:56:52,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:56:52,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:56:52,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:56:52,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763078295] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:52,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:52,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-16 11:56:52,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072921596] [2022-11-16 11:56:52,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:52,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:56:52,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:52,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:56:52,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:56:52,761 INFO L87 Difference]: Start difference. First operand 2704 states and 3508 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:53,174 INFO L93 Difference]: Finished difference Result 3894 states and 5059 transitions. [2022-11-16 11:56:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:56:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 38 [2022-11-16 11:56:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:53,182 INFO L225 Difference]: With dead ends: 3894 [2022-11-16 11:56:53,182 INFO L226 Difference]: Without dead ends: 2980 [2022-11-16 11:56:53,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:56:53,184 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 80 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:53,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 77 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:56:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2980 states. [2022-11-16 11:56:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2980 to 2634. [2022-11-16 11:56:53,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 1.302316748955564) internal successors, (3429), 2633 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:53,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 3429 transitions. [2022-11-16 11:56:53,530 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 3429 transitions. Word has length 38 [2022-11-16 11:56:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:53,531 INFO L495 AbstractCegarLoop]: Abstraction has 2634 states and 3429 transitions. [2022-11-16 11:56:53,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:53,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 3429 transitions. [2022-11-16 11:56:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-16 11:56:53,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:53,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:53,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:53,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:56:53,732 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:53,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1076330789, now seen corresponding path program 2 times [2022-11-16 11:56:53,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:53,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275310316] [2022-11-16 11:56:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:53,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:56:55,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:55,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275310316] [2022-11-16 11:56:55,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275310316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:55,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039925987] [2022-11-16 11:56:55,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:56:55,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:55,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:55,019 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:55,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:56:55,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:56:55,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:55,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-16 11:56:55,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:55,329 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 11:56:55,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 11:56:55,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:56:55,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:56:55,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:56:55,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 9 [2022-11-16 11:56:55,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 11:56:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:55,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:55,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:56:55,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:55,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:56:55,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2022-11-16 11:56:55,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-16 11:56:55,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:56:55,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:56:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:56:55,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:55,808 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1348 (Array Int Int)) (v_ArrVal_1341 (Array Int Int)) (v_ArrVal_1346 Int)) (or (not (= (select (select (store (store |c_#memory_$Pointer$.base| v_ArrVal_1346 (store v_ArrVal_1348 8 (select (select (store |c_#memory_$Pointer$.base| v_ArrVal_1346 v_ArrVal_1348) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.base| v_ArrVal_1346 v_ArrVal_1341) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| v_ArrVal_1346)) v_ArrVal_1346) 8) 0)) (not (< v_ArrVal_1346 |c_#StackHeapBarrier|)))) is different from false [2022-11-16 11:56:55,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 107 [2022-11-16 11:56:55,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 116 [2022-11-16 11:56:55,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 125 [2022-11-16 11:56:55,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 134 [2022-11-16 11:56:55,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 130 [2022-11-16 11:56:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 12 not checked. [2022-11-16 11:56:56,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039925987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:56,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:56,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 21 [2022-11-16 11:56:56,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287619080] [2022-11-16 11:56:56,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:56,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:56:56,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:56,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:56:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=324, Unknown=1, NotChecked=36, Total=420 [2022-11-16 11:56:56,022 INFO L87 Difference]: Start difference. First operand 2634 states and 3429 transitions. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:58,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:58,392 INFO L93 Difference]: Finished difference Result 5704 states and 7471 transitions. [2022-11-16 11:56:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:56:58,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 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 40 [2022-11-16 11:56:58,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:58,398 INFO L225 Difference]: With dead ends: 5704 [2022-11-16 11:56:58,398 INFO L226 Difference]: Without dead ends: 3130 [2022-11-16 11:56:58,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=293, Invalid=1192, Unknown=1, NotChecked=74, Total=1560 [2022-11-16 11:56:58,401 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 453 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:58,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 575 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 486 Invalid, 0 Unknown, 80 Unchecked, 0.9s Time] [2022-11-16 11:56:58,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2022-11-16 11:56:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 2753. [2022-11-16 11:56:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 1.284156976744186) internal successors, (3534), 2752 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:58,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 3534 transitions. [2022-11-16 11:56:58,767 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 3534 transitions. Word has length 40 [2022-11-16 11:56:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:58,768 INFO L495 AbstractCegarLoop]: Abstraction has 2753 states and 3534 transitions. [2022-11-16 11:56:58,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:58,768 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 3534 transitions. [2022-11-16 11:56:58,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:56:58,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:58,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:58,774 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:58,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:58,970 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:58,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1871575436, now seen corresponding path program 2 times [2022-11-16 11:56:58,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:58,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243716360] [2022-11-16 11:56:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:58,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:57:00,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:00,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243716360] [2022-11-16 11:57:00,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243716360] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:00,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969473887] [2022-11-16 11:57:00,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:57:00,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:00,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:00,300 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:00,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:57:00,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:57:00,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:00,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 11:57:00,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:00,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:00,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:00,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-16 11:57:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:00,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:00,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-16 11:57:00,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-16 11:57:00,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-16 11:57:00,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:57:00,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:57:00,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:57:00,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:00,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:57:00,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 38 [2022-11-16 11:57:00,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:00,941 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 11:57:00,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-11-16 11:57:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:57:00,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:03,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 104 [2022-11-16 11:57:03,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 128 [2022-11-16 11:57:03,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:57:03,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 140 [2022-11-16 11:57:03,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 76 [2022-11-16 11:57:03,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 80 [2022-11-16 11:57:03,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:57:03,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 90 [2022-11-16 11:57:03,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:05,861 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 9 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 11:57:05,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969473887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:57:05,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:57:05,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-11-16 11:57:05,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250958283] [2022-11-16 11:57:05,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:57:05,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:57:05,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:57:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:57:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=242, Unknown=3, NotChecked=0, Total=306 [2022-11-16 11:57:05,863 INFO L87 Difference]: Start difference. First operand 2753 states and 3534 transitions. Second operand has 18 states, 18 states have (on average 5.722222222222222) internal successors, (103), 18 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:57:06,879 INFO L93 Difference]: Finished difference Result 5004 states and 6391 transitions. [2022-11-16 11:57:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:57:06,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.722222222222222) internal successors, (103), 18 states have internal predecessors, (103), 0 states have call successors, (0), 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 [2022-11-16 11:57:06,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:57:06,890 INFO L225 Difference]: With dead ends: 5004 [2022-11-16 11:57:06,890 INFO L226 Difference]: Without dead ends: 2899 [2022-11-16 11:57:06,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=187, Invalid=622, Unknown=3, NotChecked=0, Total=812 [2022-11-16 11:57:06,894 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 112 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:57:06,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 283 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-16 11:57:06,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2899 states. [2022-11-16 11:57:07,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2899 to 2566. [2022-11-16 11:57:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2566 states, 2565 states have (on average 1.2717348927875243) internal successors, (3262), 2565 states have internal predecessors, (3262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:07,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2566 states to 2566 states and 3262 transitions. [2022-11-16 11:57:07,195 INFO L78 Accepts]: Start accepts. Automaton has 2566 states and 3262 transitions. Word has length 41 [2022-11-16 11:57:07,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:57:07,195 INFO L495 AbstractCegarLoop]: Abstraction has 2566 states and 3262 transitions. [2022-11-16 11:57:07,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.722222222222222) internal successors, (103), 18 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:57:07,195 INFO L276 IsEmpty]: Start isEmpty. Operand 2566 states and 3262 transitions. [2022-11-16 11:57:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:57:07,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:57:07,196 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-16 11:57:07,206 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-16 11:57:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:57:07,403 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:57:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:57:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2115090350, now seen corresponding path program 4 times [2022-11-16 11:57:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:57:07,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571137965] [2022-11-16 11:57:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:57:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:57:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:57:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:57:12,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:57:12,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571137965] [2022-11-16 11:57:12,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571137965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:57:12,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532638309] [2022-11-16 11:57:12,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:57:12,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:57:12,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:57:12,179 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:57:12,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:57:12,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:57:12,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:57:12,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 188 conjunts are in the unsatisfiable core [2022-11-16 11:57:12,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:57:12,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:57:12,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:57:12,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:57:12,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:57:12,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:57:12,615 INFO L321 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2022-11-16 11:57:12,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2022-11-16 11:57:12,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2022-11-16 11:57:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-16 11:57:12,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2022-11-16 11:57:12,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:57:12,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:12,995 INFO L321 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2022-11-16 11:57:12,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 34 [2022-11-16 11:57:13,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-16 11:57:13,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:57:14,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 67 [2022-11-16 11:57:14,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,101 INFO L321 Elim1Store]: treesize reduction 49, result has 9.3 percent of original size [2022-11-16 11:57:14,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 92 [2022-11-16 11:57:14,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 77 [2022-11-16 11:57:14,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2022-11-16 11:57:14,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 35 [2022-11-16 11:57:14,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-11-16 11:57:14,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,226 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-16 11:57:14,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 61 [2022-11-16 11:57:14,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-11-16 11:57:14,910 INFO L321 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2022-11-16 11:57:14,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 102 [2022-11-16 11:57:14,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:14,928 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 11:57:14,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 32 [2022-11-16 11:57:14,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:57:15,038 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:57:15,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:57:15,362 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1746 (Array Int Int)) (v_ArrVal_1744 (Array Int Int)) (v_ArrVal_1733 (Array Int Int)) (|v_ULTIMATE.start_append_to_queue_~n#1.offset_17| Int) (v_ArrVal_1731 (Array Int Int)) (v_ArrVal_1742 (Array Int Int)) (v_ArrVal_1750 Int)) (or (not (= (select |c_#valid| v_ArrVal_1750) 0)) (< 0 (let ((.cse4 (+ |v_ULTIMATE.start_append_to_queue_~n#1.offset_17| 8))) (let ((.cse3 (store (store |c_#memory_$Pointer$.offset| v_ArrVal_1750 (store v_ArrVal_1731 .cse4 (select (select (store |c_#memory_$Pointer$.offset| v_ArrVal_1750 v_ArrVal_1731) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.offset| v_ArrVal_1750 v_ArrVal_1744) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| |v_ULTIMATE.start_append_to_queue_~n#1.offset_17|))) (.cse0 (let ((.cse5 (store |c_#memory_$Pointer$.base| v_ArrVal_1750 (store v_ArrVal_1742 .cse4 (select (select (store |c_#memory_$Pointer$.base| v_ArrVal_1750 v_ArrVal_1742) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))))) (store .cse5 |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select .cse5 |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| v_ArrVal_1750))))) (let ((.cse1 (select (select .cse0 v_ArrVal_1750) .cse4)) (.cse2 (+ (select (select .cse3 v_ArrVal_1750) .cse4) 8))) (select (select (store (store |c_#memory_int| v_ArrVal_1750 v_ArrVal_1746) |c_ULTIMATE.start_main_~#queue~0#1.base| v_ArrVal_1733) (select (select .cse0 .cse1) .cse2)) (+ (select (select .cse3 .cse1) .cse2) 4)))))) (not (< v_ArrVal_1750 |c_#StackHeapBarrier|)))) is different from false [2022-11-16 11:57:15,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:57:15,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1341 treesize of output 1340 [2022-11-16 11:57:15,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1098 treesize of output 874 [2022-11-16 11:57:15,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 492 treesize of output 380 [2022-11-16 11:57:28,679 WARN L233 SmtUtils]: Spent 9.58s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:57:44,455 WARN L233 SmtUtils]: Spent 9.93s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:58:07,370 WARN L233 SmtUtils]: Spent 9.89s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:58:46,952 WARN L233 SmtUtils]: Spent 10.71s on a formula simplification that was a NOOP. DAG size: 101 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 11:59:10,930 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-11-16 11:59:10,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:11,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:59:11,131 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 396717 column 7: canceled at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:192) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 396717 column 7: canceled at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.push(UndoableWrapperScript.java:54) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.getRedundancy(SimplifyDDA.java:620) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getRedundancy(SimplifyDDAWithTimeout.java:120) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA$Simplifier.walk(SimplifyDDA.java:370) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.simplification.SimplifyDDA.simplifyOnce(SimplifyDDA.java:649) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.simplify.SimplifyDDAWithTimeout.getSimplifiedTerm(SimplifyDDAWithTimeout.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:198) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:265) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) ... 54 more [2022-11-16 11:59:11,134 INFO L158 Benchmark]: Toolchain (without parser) took 203915.82ms. Allocated memory was 117.4MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 72.3MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 817.7MB. Max. memory is 16.1GB. [2022-11-16 11:59:11,135 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 89.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:59:11,135 INFO L158 Benchmark]: CACSL2BoogieTranslator took 644.82ms. Allocated memory is still 117.4MB. Free memory was 72.1MB in the beginning and 84.0MB in the end (delta: -11.9MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. [2022-11-16 11:59:11,135 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.18ms. Allocated memory is still 117.4MB. Free memory was 84.0MB in the beginning and 81.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:59:11,135 INFO L158 Benchmark]: Boogie Preprocessor took 47.57ms. Allocated memory is still 117.4MB. Free memory was 81.6MB in the beginning and 79.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:59:11,135 INFO L158 Benchmark]: RCFGBuilder took 629.62ms. Allocated memory is still 117.4MB. Free memory was 79.9MB in the beginning and 63.4MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-16 11:59:11,136 INFO L158 Benchmark]: TraceAbstraction took 202507.06ms. Allocated memory was 117.4MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 62.8MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 811.0MB. Max. memory is 16.1GB. [2022-11-16 11:59:11,137 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 117.4MB. Free memory is still 89.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 644.82ms. Allocated memory is still 117.4MB. Free memory was 72.1MB in the beginning and 84.0MB in the end (delta: -11.9MB). Peak memory consumption was 8.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.18ms. Allocated memory is still 117.4MB. Free memory was 84.0MB in the beginning and 81.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.57ms. Allocated memory is still 117.4MB. Free memory was 81.6MB in the beginning and 79.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 629.62ms. Allocated memory is still 117.4MB. Free memory was 79.9MB in the beginning and 63.4MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 202507.06ms. Allocated memory was 117.4MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 62.8MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 811.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 396717 column 7: canceled de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 396717 column 7: canceled: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:192) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-16 11:59:11,347 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-11-16 11:59:11,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-data/process_queue.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8 --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 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:59:13,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:59:13,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:59:13,676 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:59:13,676 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:59:13,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:59:13,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:59:13,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:59:13,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:59:13,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:59:13,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:59:13,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:59:13,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:59:13,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:59:13,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:59:13,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:59:13,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:59:13,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:59:13,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:59:13,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:59:13,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:59:13,726 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:59:13,728 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:59:13,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:59:13,736 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:59:13,737 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:59:13,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:59:13,742 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:59:13,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:59:13,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:59:13,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:59:13,745 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:59:13,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:59:13,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:59:13,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:59:13,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:59:13,749 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:59:13,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:59:13,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:59:13,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:59:13,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:59:13,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-16 11:59:13,791 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:59:13,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:59:13,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:59:13,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:59:13,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:59:13,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:59:13,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:59:13,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:59:13,797 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:59:13,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:59:13,798 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:59:13,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:59:13,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:59:13,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:59:13,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:59:13,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:59:13,800 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:59:13,800 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:59:13,800 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:59:13,801 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:59:13,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:59:13,801 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:59:13,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:59:13,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:59:13,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:59:13,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:59:13,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:59:13,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:59:13,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:59:13,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:59:13,804 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:59:13,804 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:59:13,804 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:59:13,805 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:59:13,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:59:13,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:59:13,805 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ad9f94c1d10f7bc5f4235ca7c5dc51413b43a0e6c48b9e48da5d2e3e751252c [2022-11-16 11:59:14,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:59:14,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:59:14,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:59:14,260 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:59:14,263 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:59:14,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/heap-data/process_queue.i [2022-11-16 11:59:14,332 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/data/f5af35abc/578ea75fd02946b2bc64a57ca5da3b58/FLAG392504a44 [2022-11-16 11:59:14,903 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:59:14,904 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/sv-benchmarks/c/heap-data/process_queue.i [2022-11-16 11:59:14,916 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/data/f5af35abc/578ea75fd02946b2bc64a57ca5da3b58/FLAG392504a44 [2022-11-16 11:59:15,198 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/data/f5af35abc/578ea75fd02946b2bc64a57ca5da3b58 [2022-11-16 11:59:15,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:59:15,203 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:59:15,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:59:15,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:59:15,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:59:15,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d6400e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15, skipping insertion in model container [2022-11-16 11:59:15,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:59:15,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:59:15,686 WARN L229 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_72bcbb10-ef7e-4861-b04e-828c40185fc9/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2022-11-16 11:59:15,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:59:15,738 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:59:15,805 WARN L229 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_72bcbb10-ef7e-4861-b04e-828c40185fc9/sv-benchmarks/c/heap-data/process_queue.i[23979,23992] [2022-11-16 11:59:15,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:59:15,840 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:59:15,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15 WrapperNode [2022-11-16 11:59:15,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:59:15,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:59:15,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:59:15,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:59:15,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,866 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,891 INFO L138 Inliner]: procedures = 130, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 103 [2022-11-16 11:59:15,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:59:15,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:59:15,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:59:15,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:59:15,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,924 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,925 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,929 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:59:15,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:59:15,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:59:15,931 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:59:15,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (1/1) ... [2022-11-16 11:59:15,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:59:15,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:59:15,968 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:59:15,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:59:16,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 11:59:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:59:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:59:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:59:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:59:16,020 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:59:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:59:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-16 11:59:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 11:59:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-16 11:59:16,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:59:16,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:59:16,169 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:59:16,172 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:59:16,894 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:59:16,902 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:59:16,902 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 11:59:16,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:59:16 BoogieIcfgContainer [2022-11-16 11:59:16,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:59:16,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:59:16,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:59:16,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:59:16,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:59:15" (1/3) ... [2022-11-16 11:59:16,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5769fca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:59:16, skipping insertion in model container [2022-11-16 11:59:16,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:59:15" (2/3) ... [2022-11-16 11:59:16,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5769fca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:59:16, skipping insertion in model container [2022-11-16 11:59:16,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:59:16" (3/3) ... [2022-11-16 11:59:16,917 INFO L112 eAbstractionObserver]: Analyzing ICFG process_queue.i [2022-11-16 11:59:16,940 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:59:16,940 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:59:17,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:59:17,009 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3317da68, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:59:17,009 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:59:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:59:17,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:17,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:17,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:17,039 INFO L85 PathProgramCache]: Analyzing trace with hash 732718260, now seen corresponding path program 1 times [2022-11-16 11:59:17,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:17,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352625319] [2022-11-16 11:59:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:17,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:17,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:17,064 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:59:17,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 11:59:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:17,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:59:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:17,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:59:17,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:59:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:17,584 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:59:17,586 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:17,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352625319] [2022-11-16 11:59:17,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352625319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:17,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:17,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:59:17,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107192560] [2022-11-16 11:59:17,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:17,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:59:17,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:17,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:59:17,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:59:17,649 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:19,936 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2022-11-16 11:59:19,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:59:19,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-16 11:59:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:19,948 INFO L225 Difference]: With dead ends: 82 [2022-11-16 11:59:19,949 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 11:59:19,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:59:19,956 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:19,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 84 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-16 11:59:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 11:59:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2022-11-16 11:59:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-11-16 11:59:19,999 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 9 [2022-11-16 11:59:19,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:20,000 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-11-16 11:59:20,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:20,000 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-11-16 11:59:20,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 11:59:20,002 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:20,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:20,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:20,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:20,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:20,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:20,219 INFO L85 PathProgramCache]: Analyzing trace with hash 584031379, now seen corresponding path program 1 times [2022-11-16 11:59:20,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:20,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1580707465] [2022-11-16 11:59:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:20,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:20,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:20,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:59:20,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 11:59:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 11:59:20,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:20,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:59:20,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2022-11-16 11:59:20,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:20,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:20,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:59:20,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:20,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:59:20,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:59:20,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:59:20,792 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 11:59:20,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 11:59:20,858 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-16 11:59:20,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-16 11:59:20,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-16 11:59:20,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:59:21,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:59:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:21,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:59:21,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:21,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1580707465] [2022-11-16 11:59:21,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1580707465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:21,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:21,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:59:21,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848946356] [2022-11-16 11:59:21,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:21,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:59:21,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:21,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:59:21,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:59:21,064 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:24,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:24,221 INFO L93 Difference]: Finished difference Result 85 states and 115 transitions. [2022-11-16 11:59:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:59:24,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-11-16 11:59:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:24,225 INFO L225 Difference]: With dead ends: 85 [2022-11-16 11:59:24,225 INFO L226 Difference]: Without dead ends: 57 [2022-11-16 11:59:24,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:59:24,227 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:24,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 74 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-16 11:59:24,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-16 11:59:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2022-11-16 11:59:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:24,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2022-11-16 11:59:24,263 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 9 [2022-11-16 11:59:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:24,264 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2022-11-16 11:59:24,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2022-11-16 11:59:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-16 11:59:24,265 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:24,266 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:24,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:24,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:24,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash -29798612, now seen corresponding path program 1 times [2022-11-16 11:59:24,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:24,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117743788] [2022-11-16 11:59:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:24,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:24,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:24,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:59:24,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 11:59:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:24,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 11:59:24,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:24,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:59:24,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:24,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:24,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-16 11:59:24,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:24,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:24,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-16 11:59:24,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-16 11:59:24,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-16 11:59:24,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-16 11:59:24,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-11-16 11:59:24,976 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-16 11:59:24,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-16 11:59:25,242 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-16 11:59:25,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 40 [2022-11-16 11:59:25,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 12 [2022-11-16 11:59:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:25,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:27,728 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_93 (_ BitVec 32))) (or (not (= (select |c_#valid| v_ArrVal_93) (_ bv0 1))) (forall ((v_ArrVal_101 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_90 (_ BitVec 32)) (v_ArrVal_105 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse0 (bvadd (_ bv8 32) v_ArrVal_90))) (select (select (store (store |c_#memory_$Pointer$.base| v_ArrVal_93 (store v_ArrVal_101 .cse0 (select (select (store |c_#memory_$Pointer$.base| v_ArrVal_93 v_ArrVal_101) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))) |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select (store |c_#memory_$Pointer$.base| v_ArrVal_93 v_ArrVal_105) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| v_ArrVal_93)) v_ArrVal_93) .cse0)) (_ bv0 32))))) (forall ((v_ArrVal_93 (_ BitVec 32))) (or (forall ((v_ArrVal_90 (_ BitVec 32)) (v_ArrVal_98 (Array (_ BitVec 32) (_ BitVec 32)))) (= (let ((.cse2 (bvadd (_ bv8 32) v_ArrVal_90))) (select (select (let ((.cse1 (store |c_#memory_$Pointer$.offset| v_ArrVal_93 (store v_ArrVal_98 .cse2 (select (select (store |c_#memory_$Pointer$.offset| v_ArrVal_93 v_ArrVal_98) |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset|))))) (store .cse1 |c_ULTIMATE.start_main_~#queue~0#1.base| (store (select .cse1 |c_ULTIMATE.start_main_~#queue~0#1.base|) |c_ULTIMATE.start_main_~#queue~0#1.offset| v_ArrVal_90))) v_ArrVal_93) .cse2)) (_ bv0 32))) (not (= (select |c_#valid| v_ArrVal_93) (_ bv0 1)))))) is different from false [2022-11-16 11:59:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:27,861 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:27,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117743788] [2022-11-16 11:59:27,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117743788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:27,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:27,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-16 11:59:27,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534803855] [2022-11-16 11:59:27,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:27,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 11:59:27,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:27,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 11:59:27,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=42, Unknown=2, NotChecked=12, Total=72 [2022-11-16 11:59:27,870 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:30,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-16 11:59:43,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:43,523 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2022-11-16 11:59:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:59:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-16 11:59:43,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:43,525 INFO L225 Difference]: With dead ends: 102 [2022-11-16 11:59:43,525 INFO L226 Difference]: Without dead ends: 70 [2022-11-16 11:59:43,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=35, Invalid=98, Unknown=3, NotChecked=20, Total=156 [2022-11-16 11:59:43,526 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 32 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:43,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 166 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 54 Unchecked, 5.1s Time] [2022-11-16 11:59:43,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-16 11:59:43,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2022-11-16 11:59:43,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 45 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) [2022-11-16 11:59:43,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-16 11:59:43,538 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 12 [2022-11-16 11:59:43,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:43,538 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-16 11:59:43,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:43,539 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-16 11:59:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 11:59:43,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:43,540 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:43,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:43,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:43,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:43,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1532767046, now seen corresponding path program 1 times [2022-11-16 11:59:43,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:43,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1735571778] [2022-11-16 11:59:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:43,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:43,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:43,762 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:59:43,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-16 11:59:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:43,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:59:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:44,077 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-16 11:59:44,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-16 11:59:44,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:59:44,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-16 11:59:44,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 19 [2022-11-16 11:59:44,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 11:59:44,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-16 11:59:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:59:44,299 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:59:44,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:44,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1735571778] [2022-11-16 11:59:44,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1735571778] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:59:44,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:59:44,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:59:44,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45045609] [2022-11-16 11:59:44,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:59:44,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:59:44,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:59:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:59:44,302 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:45,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:45,288 INFO L93 Difference]: Finished difference Result 100 states and 133 transitions. [2022-11-16 11:59:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:59:45,292 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 11:59:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:45,293 INFO L225 Difference]: With dead ends: 100 [2022-11-16 11:59:45,293 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 11:59:45,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:59:45,294 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:45,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 63 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:59:45,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 11:59:45,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2022-11-16 11:59:45,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 58 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2022-11-16 11:59:45,320 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 15 [2022-11-16 11:59:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:45,320 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2022-11-16 11:59:45,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:45,321 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2022-11-16 11:59:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:59:45,323 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:45,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:45,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-11-16 11:59:45,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:45,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1075409043, now seen corresponding path program 1 times [2022-11-16 11:59:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:45,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964131690] [2022-11-16 11:59:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:59:45,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:45,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:45,544 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:59:45,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 11:59:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:59:45,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-16 11:59:45,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:46,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:46,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:46,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:59:46,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2022-11-16 11:59:46,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:46,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:46,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:59:46,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:59:46,178 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 11:59:46,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 28 [2022-11-16 11:59:46,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:59:46,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-16 11:59:46,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:59:46,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:59:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:46,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:46,570 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:59:46,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 35 [2022-11-16 11:59:46,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-11-16 11:59:46,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-16 11:59:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:46,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:59:46,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964131690] [2022-11-16 11:59:46,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964131690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:59:46,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:59:46,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-16 11:59:46,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414078930] [2022-11-16 11:59:46,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:59:46,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:59:46,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:59:46,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:59:46,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:59:46,872 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:59:51,245 INFO L93 Difference]: Finished difference Result 180 states and 239 transitions. [2022-11-16 11:59:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-16 11:59:51,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 11:59:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:59:51,247 INFO L225 Difference]: With dead ends: 180 [2022-11-16 11:59:51,247 INFO L226 Difference]: Without dead ends: 135 [2022-11-16 11:59:51,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:59:51,249 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:59:51,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 204 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 104 Invalid, 0 Unknown, 44 Unchecked, 3.8s Time] [2022-11-16 11:59:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-11-16 11:59:51,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 115. [2022-11-16 11:59:51,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.3070175438596492) internal successors, (149), 114 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) [2022-11-16 11:59:51,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 149 transitions. [2022-11-16 11:59:51,267 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 149 transitions. Word has length 18 [2022-11-16 11:59:51,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:59:51,268 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 149 transitions. [2022-11-16 11:59:51,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:59:51,268 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 149 transitions. [2022-11-16 11:59:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:59:51,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:59:51,269 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 11:59:51,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:59:51,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:51,491 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:59:51,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:59:51,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1353644844, now seen corresponding path program 2 times [2022-11-16 11:59:51,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:59:51,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627849481] [2022-11-16 11:59:51,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:59:51,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:59:51,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:59:51,494 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:59:51,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72bcbb10-ef7e-4861-b04e-828c40185fc9/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 11:59:51,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:59:51,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:59:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 11:59:51,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:59:51,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-11-16 11:59:51,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:51,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:51,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:59:51,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2022-11-16 11:59:51,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:51,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:51,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2022-11-16 11:59:51,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:59:51,937 INFO L321 Elim1Store]: treesize reduction 30, result has 34.8 percent of original size [2022-11-16 11:59:51,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-11-16 11:59:51,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:59:51,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-16 11:59:52,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:52,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:52,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 45 [2022-11-16 11:59:52,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:52,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:52,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-11-16 11:59:52,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-16 11:59:52,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2022-11-16 11:59:52,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-16 11:59:52,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-11-16 11:59:52,537 INFO L321 Elim1Store]: treesize reduction 60, result has 49.6 percent of original size [2022-11-16 11:59:52,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 69 [2022-11-16 11:59:52,603 INFO L321 Elim1Store]: treesize reduction 12, result has 72.1 percent of original size [2022-11-16 11:59:52,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-11-16 11:59:54,814 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2022-11-16 11:59:54,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 51 [2022-11-16 11:59:54,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:59:54,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 12 [2022-11-16 11:59:54,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:59:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:59:54,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:59:58,844 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:59:58,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 191 [2022-11-16 11:59:58,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:59:58,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 525 treesize of output 523 [2022-11-16 11:59:58,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 11:59:58,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1246 treesize of output 1236 [2022-11-16 11:59:58,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 12:00:17,098 WARN L233 SmtUtils]: Spent 18.14s on a formula simplification. DAG size of input: 975 DAG size of output: 375 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-16 12:00:17,102 INFO L321 Elim1Store]: treesize reduction 5880, result has 22.6 percent of original size [2022-11-16 12:00:17,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 25 select indices, 25 select index equivalence classes, 0 disjoint index pairs (out of 300 index pairs), introduced 25 new quantified variables, introduced 300 case distinctions, treesize of input 12829 treesize of output 13768 [2022-11-16 12:00:18,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10962 treesize of output 10490 [2022-11-16 12:00:20,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12924 treesize of output 11984 [2022-11-16 12:00:21,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15260 treesize of output 14972 [2022-11-16 12:00:23,143 INFO L217 Elim1Store]: Index analysis took 389 ms [2022-11-16 12:00:24,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:00:24,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 14312 treesize of output 14144 [2022-11-16 12:00:24,945 INFO L217 Elim1Store]: Index analysis took 303 ms [2022-11-16 12:00:25,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:00:25,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 13944 treesize of output 13500 [2022-11-16 12:00:26,692 INFO L217 Elim1Store]: Index analysis took 298 ms [2022-11-16 12:00:27,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 12:00:27,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 13300 treesize of output 12120 [2022-11-16 12:00:28,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12772 treesize of output 11812 [2022-11-16 12:00:30,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1318 treesize of output 1158 [2022-11-16 12:00:32,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1478 treesize of output 1286 [2022-11-16 12:00:34,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 750 treesize of output 638 [2022-11-16 12:00:35,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3010 treesize of output 2520