./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ --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 ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- 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-dbf71c6-m [2022-10-17 10:50:13,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:50:13,707 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:50:13,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:50:13,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:50:13,768 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:50:13,770 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:50:13,774 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:50:13,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:50:13,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:50:13,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:50:13,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:50:13,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:50:13,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:50:13,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:50:13,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:50:13,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:50:13,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:50:13,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:50:13,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:50:13,813 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:50:13,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:50:13,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:50:13,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:50:13,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:50:13,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:50:13,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:50:13,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:50:13,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:50:13,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:50:13,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:50:13,836 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:50:13,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:50:13,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:50:13,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:50:13,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:50:13,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:50:13,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:50:13,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:50:13,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:50:13,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:50:13,844 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:50:13,885 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:50:13,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:50:13,886 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:50:13,886 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:50:13,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:50:13,887 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:50:13,888 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:50:13,888 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:50:13,888 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:50:13,889 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:50:13,890 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:50:13,890 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:50:13,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:50:13,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:50:13,891 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:50:13,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:50:13,891 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:50:13,891 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:50:13,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:50:13,892 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:50:13,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:50:13,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:50:13,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:50:13,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:50:13,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:50:13,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:50:13,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:50:13,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:50:13,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:50:13,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:50:13,896 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:50:13,896 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:50:13,896 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:50:13,897 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_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-10-17 10:50:14,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:50:14,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:50:14,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:50:14,221 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:50:14,222 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:50:14,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/verifythis/duplets.c [2022-10-17 10:50:14,306 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/data/30ac9de47/599ff84913114761895618cf852c885f/FLAGb4ae6acee [2022-10-17 10:50:14,754 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:50:14,755 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/sv-benchmarks/c/verifythis/duplets.c [2022-10-17 10:50:14,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/data/30ac9de47/599ff84913114761895618cf852c885f/FLAGb4ae6acee [2022-10-17 10:50:15,150 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/data/30ac9de47/599ff84913114761895618cf852c885f [2022-10-17 10:50:15,153 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:50:15,155 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:50:15,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:50:15,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:50:15,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:50:15,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543a0147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15, skipping insertion in model container [2022-10-17 10:50:15,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:50:15,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:50:15,419 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-10-17 10:50:15,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:50:15,457 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:50:15,470 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-10-17 10:50:15,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:50:15,499 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:50:15,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15 WrapperNode [2022-10-17 10:50:15,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:50:15,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:50:15,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:50:15,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:50:15,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,545 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 120 [2022-10-17 10:50:15,546 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:50:15,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:50:15,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:50:15,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:50:15,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,561 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,562 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,575 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,576 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:50:15,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:50:15,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:50:15,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:50:15,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (1/1) ... [2022-10-17 10:50:15,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:50:15,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:15,634 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:50:15,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:50:15,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:50:15,685 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 10:50:15,685 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 10:50:15,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:50:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 10:50:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:50:15,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:50:15,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:50:15,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:50:15,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:50:15,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:50:15,695 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:50:15,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:50:15,831 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:50:15,833 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:50:16,245 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:50:16,257 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:50:16,259 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 10:50:16,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:50:16 BoogieIcfgContainer [2022-10-17 10:50:16,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:50:16,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:50:16,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:50:16,268 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:50:16,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:50:15" (1/3) ... [2022-10-17 10:50:16,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d229a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:50:16, skipping insertion in model container [2022-10-17 10:50:16,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:15" (2/3) ... [2022-10-17 10:50:16,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d229a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:50:16, skipping insertion in model container [2022-10-17 10:50:16,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:50:16" (3/3) ... [2022-10-17 10:50:16,275 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-10-17 10:50:16,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:50:16,297 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:50:16,393 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:50:16,407 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;@56a5db0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:50:16,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:50:16,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:50:16,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-17 10:50:16,424 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:16,425 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:16,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:16,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1761765480, now seen corresponding path program 1 times [2022-10-17 10:50:16,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:16,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546267639] [2022-10-17 10:50:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:16,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:16,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:16,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:16,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546267639] [2022-10-17 10:50:16,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546267639] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:16,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:16,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:50:16,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840926593] [2022-10-17 10:50:16,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:16,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:50:16,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:50:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:50:16,808 INFO L87 Difference]: Start difference. First operand has 42 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:50:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:16,851 INFO L93 Difference]: Finished difference Result 81 states and 119 transitions. [2022-10-17 10:50:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:50:16,854 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-10-17 10:50:16,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:16,866 INFO L225 Difference]: With dead ends: 81 [2022-10-17 10:50:16,866 INFO L226 Difference]: Without dead ends: 38 [2022-10-17 10:50:16,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:50:16,886 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:16,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:50:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-10-17 10:50:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-10-17 10:50:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:50:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-10-17 10:50:16,950 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 33 [2022-10-17 10:50:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:16,951 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-10-17 10:50:16,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:50:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-10-17 10:50:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-10-17 10:50:16,958 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:16,958 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:16,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:50:16,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1486889832, now seen corresponding path program 1 times [2022-10-17 10:50:16,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:16,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600271664] [2022-10-17 10:50:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:16,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:17,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:17,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:17,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:17,586 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:50:17,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:17,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600271664] [2022-10-17 10:50:17,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600271664] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:17,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241126613] [2022-10-17 10:50:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:17,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:17,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:17,590 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:17,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:50:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:17,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:50:17,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:17,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:50:17,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:50:18,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241126613] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:50:18,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:50:18,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-10-17 10:50:18,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448968766] [2022-10-17 10:50:18,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:18,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:50:18,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:18,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:50:18,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:50:18,135 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-17 10:50:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:18,373 INFO L93 Difference]: Finished difference Result 86 states and 117 transitions. [2022-10-17 10:50:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:50:18,374 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2022-10-17 10:50:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:18,376 INFO L225 Difference]: With dead ends: 86 [2022-10-17 10:50:18,376 INFO L226 Difference]: Without dead ends: 67 [2022-10-17 10:50:18,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:50:18,379 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 158 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:18,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 203 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:18,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-10-17 10:50:18,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 39. [2022-10-17 10:50:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-10-17 10:50:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2022-10-17 10:50:18,411 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 33 [2022-10-17 10:50:18,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:18,412 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2022-10-17 10:50:18,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-17 10:50:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2022-10-17 10:50:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 10:50:18,414 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:18,414 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:18,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:18,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:18,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:18,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash -534242288, now seen corresponding path program 1 times [2022-10-17 10:50:18,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:18,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338180854] [2022-10-17 10:50:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:18,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:18,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:18,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:18,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:18,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:18,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:18,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:18,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338180854] [2022-10-17 10:50:18,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338180854] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:18,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:18,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:50:18,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936552988] [2022-10-17 10:50:18,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:18,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:50:18,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:50:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:50:18,783 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:50:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:18,882 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-10-17 10:50:18,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:50:18,882 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-10-17 10:50:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:18,887 INFO L225 Difference]: With dead ends: 57 [2022-10-17 10:50:18,887 INFO L226 Difference]: Without dead ends: 55 [2022-10-17 10:50:18,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:50:18,891 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 22 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:18,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 241 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:50:18,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-10-17 10:50:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2022-10-17 10:50:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:50:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-10-17 10:50:18,917 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 34 [2022-10-17 10:50:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:18,918 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-10-17 10:50:18,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:50:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-10-17 10:50:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-10-17 10:50:18,919 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:18,919 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:18,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:50:18,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:18,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1697931955, now seen corresponding path program 1 times [2022-10-17 10:50:18,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:18,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954876378] [2022-10-17 10:50:18,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:18,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:19,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:19,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:19,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:19,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:19,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 10:50:19,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:19,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954876378] [2022-10-17 10:50:19,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954876378] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:19,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:19,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-10-17 10:50:19,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87651066] [2022-10-17 10:50:19,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:19,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:50:19,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:50:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:50:19,481 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:50:20,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:20,008 INFO L93 Difference]: Finished difference Result 92 states and 120 transitions. [2022-10-17 10:50:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:50:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-10-17 10:50:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:20,012 INFO L225 Difference]: With dead ends: 92 [2022-10-17 10:50:20,013 INFO L226 Difference]: Without dead ends: 62 [2022-10-17 10:50:20,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:50:20,020 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 183 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:20,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 242 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:50:20,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-10-17 10:50:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-10-17 10:50:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:50:20,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-10-17 10:50:20,053 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 36 [2022-10-17 10:50:20,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:20,060 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-10-17 10:50:20,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:50:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-10-17 10:50:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-10-17 10:50:20,063 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:20,063 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:20,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:50:20,063 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:20,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1519460479, now seen corresponding path program 1 times [2022-10-17 10:50:20,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:20,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153422674] [2022-10-17 10:50:20,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:20,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:20,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:20,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153422674] [2022-10-17 10:50:20,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153422674] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:20,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811393263] [2022-10-17 10:50:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:20,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:20,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:20,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:20,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:50:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:50:20,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:20,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:20,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811393263] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:50:20,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:50:20,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-10-17 10:50:20,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863975544] [2022-10-17 10:50:20,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:20,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:50:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:50:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:50:20,381 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:50:20,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:20,474 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2022-10-17 10:50:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:50:20,476 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2022-10-17 10:50:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:20,482 INFO L225 Difference]: With dead ends: 78 [2022-10-17 10:50:20,482 INFO L226 Difference]: Without dead ends: 59 [2022-10-17 10:50:20,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:50:20,485 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 28 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:20,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 168 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:50:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-10-17 10:50:20,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2022-10-17 10:50:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-10-17 10:50:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-10-17 10:50:20,514 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 39 [2022-10-17 10:50:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:20,514 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-10-17 10:50:20,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:50:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-10-17 10:50:20,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 10:50:20,523 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:20,523 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:20,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:20,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:20,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash 764415265, now seen corresponding path program 1 times [2022-10-17 10:50:20,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:20,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286732653] [2022-10-17 10:50:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:20,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:21,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-10-17 10:50:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:21,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:21,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286732653] [2022-10-17 10:50:21,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286732653] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:21,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415250847] [2022-10-17 10:50:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:21,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:21,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:21,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:21,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:50:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2022-10-17 10:50:21,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:21,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-10-17 10:50:21,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 [2022-10-17 10:50:21,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 [2022-10-17 10:50:22,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 10:50:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:22,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:22,216 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:50:22,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 19 [2022-10-17 10:50:22,227 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:50:22,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 33 [2022-10-17 10:50:22,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-10-17 10:50:22,410 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:22,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415250847] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:22,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:50:22,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 10] total 24 [2022-10-17 10:50:22,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193173926] [2022-10-17 10:50:22,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:22,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:50:22,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:22,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:50:22,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:50:22,413 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:50:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:22,709 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2022-10-17 10:50:22,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:50:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-10-17 10:50:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:22,711 INFO L225 Difference]: With dead ends: 83 [2022-10-17 10:50:22,712 INFO L226 Difference]: Without dead ends: 81 [2022-10-17 10:50:22,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-10-17 10:50:22,713 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 38 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:22,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 306 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:50:22,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-10-17 10:50:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 61. [2022-10-17 10:50:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 47 states have internal predecessors, (54), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:50:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2022-10-17 10:50:22,736 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 41 [2022-10-17 10:50:22,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:22,737 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2022-10-17 10:50:22,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:50:22,737 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2022-10-17 10:50:22,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 10:50:22,738 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:22,738 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:22,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:22,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:50:22,953 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:22,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:22,953 INFO L85 PathProgramCache]: Analyzing trace with hash 766262307, now seen corresponding path program 1 times [2022-10-17 10:50:22,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:22,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253528089] [2022-10-17 10:50:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:22,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-10-17 10:50:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:23,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:23,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253528089] [2022-10-17 10:50:23,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253528089] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:23,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:23,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-10-17 10:50:23,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838274917] [2022-10-17 10:50:23,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:23,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 10:50:23,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:23,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 10:50:23,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-10-17 10:50:23,305 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:50:23,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:23,586 INFO L93 Difference]: Finished difference Result 93 states and 120 transitions. [2022-10-17 10:50:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 10:50:23,586 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-10-17 10:50:23,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:23,588 INFO L225 Difference]: With dead ends: 93 [2022-10-17 10:50:23,588 INFO L226 Difference]: Without dead ends: 79 [2022-10-17 10:50:23,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:50:23,590 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 47 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:23,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 187 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:50:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-10-17 10:50:23,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2022-10-17 10:50:23,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 48 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:50:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2022-10-17 10:50:23,617 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 41 [2022-10-17 10:50:23,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:23,617 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2022-10-17 10:50:23,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:50:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2022-10-17 10:50:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 10:50:23,619 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:23,619 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:23,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 10:50:23,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:23,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1347467836, now seen corresponding path program 2 times [2022-10-17 10:50:23,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:23,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012268203] [2022-10-17 10:50:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:23,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:24,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:24,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:24,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:24,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 10:50:24,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012268203] [2022-10-17 10:50:24,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012268203] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:24,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993413246] [2022-10-17 10:50:24,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:50:24,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:24,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:24,905 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:24,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:50:25,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:50:25,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:50:25,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 53 conjunts are in the unsatisfiable core [2022-10-17 10:50:25,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:25,267 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-10-17 10:50:25,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 22 treesize of output 23 [2022-10-17 10:50:27,124 INFO L356 Elim1Store]: treesize reduction 12, result has 81.5 percent of original size [2022-10-17 10:50:27,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 62 [2022-10-17 10:50:27,507 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 10:50:27,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:27,940 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:50:27,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 503 treesize of output 435 [2022-10-17 10:50:30,356 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-10-17 10:50:30,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993413246] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:50:30,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:50:30,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-10-17 10:50:30,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126323192] [2022-10-17 10:50:30,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:30,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-10-17 10:50:30,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:30,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-10-17 10:50:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1141, Unknown=1, NotChecked=0, Total=1260 [2022-10-17 10:50:30,362 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-10-17 10:50:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:35,582 INFO L93 Difference]: Finished difference Result 113 states and 144 transitions. [2022-10-17 10:50:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 10:50:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 42 [2022-10-17 10:50:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:35,585 INFO L225 Difference]: With dead ends: 113 [2022-10-17 10:50:35,585 INFO L226 Difference]: Without dead ends: 78 [2022-10-17 10:50:35,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=239, Invalid=1922, Unknown=1, NotChecked=0, Total=2162 [2022-10-17 10:50:35,587 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 27 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:35,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 655 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 309 Invalid, 0 Unknown, 25 Unchecked, 0.3s Time] [2022-10-17 10:50:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-10-17 10:50:35,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2022-10-17 10:50:35,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 51 states have internal predecessors, (59), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:50:35,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-10-17 10:50:35,613 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 42 [2022-10-17 10:50:35,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:35,613 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-10-17 10:50:35,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-10-17 10:50:35,614 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-10-17 10:50:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:50:35,615 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:35,615 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:35,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:35,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:35,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash 236785912, now seen corresponding path program 3 times [2022-10-17 10:50:35,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:35,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647795350] [2022-10-17 10:50:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:35,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:35,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:35,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:35,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:35,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:35,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:35,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647795350] [2022-10-17 10:50:35,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647795350] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:35,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440026187] [2022-10-17 10:50:35,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:50:35,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:35,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:35,933 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:35,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:50:36,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 10:50:36,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:50:36,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 10:50:36,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:36,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:36,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:36,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440026187] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:50:36,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:50:36,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-10-17 10:50:36,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509750171] [2022-10-17 10:50:36,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:36,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:50:36,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:36,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:50:36,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:50:36,131 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:50:36,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:36,320 INFO L93 Difference]: Finished difference Result 132 states and 172 transitions. [2022-10-17 10:50:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:50:36,321 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2022-10-17 10:50:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:36,322 INFO L225 Difference]: With dead ends: 132 [2022-10-17 10:50:36,322 INFO L226 Difference]: Without dead ends: 97 [2022-10-17 10:50:36,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:50:36,324 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 72 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:36,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 255 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:36,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-10-17 10:50:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2022-10-17 10:50:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 57 states have internal predecessors, (67), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-10-17 10:50:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2022-10-17 10:50:36,351 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 45 [2022-10-17 10:50:36,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:36,352 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2022-10-17 10:50:36,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-10-17 10:50:36,352 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2022-10-17 10:50:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-17 10:50:36,353 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:36,354 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:36,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:36,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:36,577 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1486891216, now seen corresponding path program 1 times [2022-10-17 10:50:36,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:36,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140223076] [2022-10-17 10:50:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:36,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:36,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:36,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:36,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:36,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:36,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:36,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-10-17 10:50:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:36,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:50:36,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-17 10:50:36,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:36,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140223076] [2022-10-17 10:50:36,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140223076] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:36,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:36,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:50:36,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067215465] [2022-10-17 10:50:36,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:36,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:50:36,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:50:36,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:50:36,889 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 10:50:37,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:37,098 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2022-10-17 10:50:37,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:50:37,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-10-17 10:50:37,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:37,101 INFO L225 Difference]: With dead ends: 88 [2022-10-17 10:50:37,102 INFO L226 Difference]: Without dead ends: 86 [2022-10-17 10:50:37,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:50:37,103 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 44 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:37,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 222 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:37,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-10-17 10:50:37,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-10-17 10:50:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 63 states have internal predecessors, (73), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 10:50:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2022-10-17 10:50:37,134 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 48 [2022-10-17 10:50:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:37,134 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2022-10-17 10:50:37,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 10:50:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2022-10-17 10:50:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-10-17 10:50:37,136 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:37,136 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:37,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-10-17 10:50:37,136 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:37,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:37,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1485044174, now seen corresponding path program 1 times [2022-10-17 10:50:37,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:37,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059527048] [2022-10-17 10:50:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:37,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:37,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:37,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:37,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:37,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:37,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:37,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-10-17 10:50:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:37,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-10-17 10:50:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:37,376 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-10-17 10:50:37,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:37,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059527048] [2022-10-17 10:50:37,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059527048] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:37,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:37,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:50:37,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618339036] [2022-10-17 10:50:37,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:37,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:50:37,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:37,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:50:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:50:37,383 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 10:50:37,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:37,519 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2022-10-17 10:50:37,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:50:37,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-10-17 10:50:37,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:37,522 INFO L225 Difference]: With dead ends: 99 [2022-10-17 10:50:37,522 INFO L226 Difference]: Without dead ends: 88 [2022-10-17 10:50:37,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:50:37,524 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 23 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:37,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 144 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:37,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-10-17 10:50:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-10-17 10:50:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 10:50:37,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2022-10-17 10:50:37,558 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 48 [2022-10-17 10:50:37,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:37,560 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2022-10-17 10:50:37,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-10-17 10:50:37,561 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2022-10-17 10:50:37,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 10:50:37,562 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:37,562 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:37,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:50:37,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:37,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:37,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2047136682, now seen corresponding path program 1 times [2022-10-17 10:50:37,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:37,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157355638] [2022-10-17 10:50:37,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:37,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:38,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:38,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:38,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:38,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:38,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 10:50:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-10-17 10:50:38,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:38,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157355638] [2022-10-17 10:50:38,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157355638] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:38,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890990765] [2022-10-17 10:50:38,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:38,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:38,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:38,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:38,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:50:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:38,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-17 10:50:38,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:38,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-10-17 10:50:38,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 [2022-10-17 10:50:38,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 18 [2022-10-17 10:50:38,607 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 9 [2022-10-17 10:50:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:38,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:38,746 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:50:38,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 19 [2022-10-17 10:50:38,757 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:50:38,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 33 [2022-10-17 10:50:38,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 5 treesize of output 3 [2022-10-17 10:50:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:39,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890990765] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:50:39,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:50:39,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-10-17 10:50:39,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266460095] [2022-10-17 10:50:39,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:39,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-17 10:50:39,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-17 10:50:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:50:39,074 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 10:50:40,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:40,123 INFO L93 Difference]: Finished difference Result 115 states and 147 transitions. [2022-10-17 10:50:40,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 10:50:40,124 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2022-10-17 10:50:40,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:40,125 INFO L225 Difference]: With dead ends: 115 [2022-10-17 10:50:40,125 INFO L226 Difference]: Without dead ends: 113 [2022-10-17 10:50:40,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=324, Invalid=1236, Unknown=0, NotChecked=0, Total=1560 [2022-10-17 10:50:40,127 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 153 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:40,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 432 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-10-17 10:50:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-10-17 10:50:40,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2022-10-17 10:50:40,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 65 states have (on average 1.2) internal successors, (78), 68 states have internal predecessors, (78), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2022-10-17 10:50:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-10-17 10:50:40,156 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 50 [2022-10-17 10:50:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:40,157 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-10-17 10:50:40,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.782608695652174) internal successors, (64), 24 states have internal predecessors, (64), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-10-17 10:50:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2022-10-17 10:50:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-10-17 10:50:40,158 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:40,158 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:40,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:40,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-10-17 10:50:40,385 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:40,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:40,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2045289640, now seen corresponding path program 1 times [2022-10-17 10:50:40,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:40,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909365006] [2022-10-17 10:50:40,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:40,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:40,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:40,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:50:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:40,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:50:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:40,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:50:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:40,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 10:50:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-10-17 10:50:40,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:40,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909365006] [2022-10-17 10:50:40,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909365006] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:40,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223738076] [2022-10-17 10:50:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:40,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:40,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:40,753 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:40,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:50:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2022-10-17 10:50:40,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:40,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 treesize of output 8 [2022-10-17 10:50:41,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 [2022-10-17 10:50:41,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 [2022-10-17 10:50:41,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 10:50:41,135 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-10-17 10:50:41,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:41,169 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:50:41,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 20 treesize of output 21 [2022-10-17 10:50:41,178 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:50:41,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 37 [2022-10-17 10:50:41,194 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 7 treesize of output 5 [2022-10-17 10:50:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-10-17 10:50:41,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223738076] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:41,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:50:41,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 17 [2022-10-17 10:50:41,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952519405] [2022-10-17 10:50:41,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:41,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:50:41,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:41,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:50:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:50:41,401 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:50:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:41,555 INFO L93 Difference]: Finished difference Result 110 states and 134 transitions. [2022-10-17 10:50:41,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:50:41,556 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2022-10-17 10:50:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:41,558 INFO L225 Difference]: With dead ends: 110 [2022-10-17 10:50:41,558 INFO L226 Difference]: Without dead ends: 91 [2022-10-17 10:50:41,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-10-17 10:50:41,559 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 43 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:41,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 130 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:41,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-10-17 10:50:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-10-17 10:50:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 67 states have internal predecessors, (77), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-10-17 10:50:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-10-17 10:50:41,587 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 50 [2022-10-17 10:50:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:41,587 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-10-17 10:50:41,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 10:50:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-10-17 10:50:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-10-17 10:50:41,588 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:41,589 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:41,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:41,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b240c1aa-af8d-413a-86f0-d1cf9cd70ef3/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-10-17 10:50:41,804 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:50:41,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:41,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1688735023, now seen corresponding path program 4 times [2022-10-17 10:50:41,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:41,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820129171] [2022-10-17 10:50:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:41,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat