./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/tree_max.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/tree_max.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 23:45:56,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 23:45:56,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 23:45:56,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 23:45:56,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 23:45:56,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 23:45:56,966 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 23:45:56,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 23:45:56,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 23:45:56,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 23:45:56,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 23:45:56,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 23:45:56,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 23:45:56,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 23:45:56,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 23:45:56,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 23:45:56,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 23:45:56,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 23:45:56,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 23:45:56,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 23:45:56,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 23:45:56,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 23:45:56,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 23:45:56,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 23:45:56,993 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 23:45:56,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 23:45:56,994 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 23:45:56,995 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 23:45:56,996 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 23:45:56,997 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 23:45:56,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 23:45:56,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 23:45:56,998 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 23:45:56,999 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 23:45:57,000 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 23:45:57,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 23:45:57,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 23:45:57,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 23:45:57,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 23:45:57,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 23:45:57,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 23:45:57,003 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 23:45:57,023 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 23:45:57,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 23:45:57,024 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 23:45:57,024 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 23:45:57,025 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 23:45:57,025 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 23:45:57,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 23:45:57,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 23:45:57,026 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 23:45:57,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 23:45:57,026 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 23:45:57,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 23:45:57,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 23:45:57,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 23:45:57,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 23:45:57,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 23:45:57,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 23:45:57,027 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 23:45:57,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 23:45:57,028 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 23:45:57,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 23:45:57,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 23:45:57,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 23:45:57,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 23:45:57,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:45:57,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 23:45:57,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 23:45:57,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 23:45:57,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 23:45:57,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 23:45:57,029 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 23:45:57,029 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 23:45:57,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 23:45:57,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 23:45:57,030 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_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e98a60ea9ee0c00575c08606ce8b95d0660c5b235c5932147dfee4b13512f57c [2021-12-06 23:45:57,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 23:45:57,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 23:45:57,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 23:45:57,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 23:45:57,241 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 23:45:57,242 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/verifythis/tree_max.c [2021-12-06 23:45:57,283 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/data/70819fe78/7d33036d9f764792b2481fd486485e1c/FLAGc5bb400d5 [2021-12-06 23:45:57,656 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 23:45:57,657 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/sv-benchmarks/c/verifythis/tree_max.c [2021-12-06 23:45:57,661 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/data/70819fe78/7d33036d9f764792b2481fd486485e1c/FLAGc5bb400d5 [2021-12-06 23:45:57,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/data/70819fe78/7d33036d9f764792b2481fd486485e1c [2021-12-06 23:45:57,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 23:45:57,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 23:45:57,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 23:45:57,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 23:45:57,679 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 23:45:57,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e622883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57, skipping insertion in model container [2021-12-06 23:45:57,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 23:45:57,696 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 23:45:57,800 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_b39db549-aca9-470a-b4a6-1347f90ad334/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2021-12-06 23:45:57,812 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:45:57,818 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 23:45:57,827 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_b39db549-aca9-470a-b4a6-1347f90ad334/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2021-12-06 23:45:57,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 23:45:57,843 INFO L208 MainTranslator]: Completed translation [2021-12-06 23:45:57,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57 WrapperNode [2021-12-06 23:45:57,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 23:45:57,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 23:45:57,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 23:45:57,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 23:45:57,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,867 INFO L137 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 38 [2021-12-06 23:45:57,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 23:45:57,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 23:45:57,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 23:45:57,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 23:45:57,874 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,874 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 23:45:57,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 23:45:57,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 23:45:57,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 23:45:57,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (1/1) ... [2021-12-06 23:45:57,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 23:45:57,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:45:57,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 23:45:57,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 23:45:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 23:45:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 23:45:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure max [2021-12-06 23:45:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2021-12-06 23:45:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2021-12-06 23:45:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2021-12-06 23:45:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 23:45:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-12-06 23:45:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-12-06 23:45:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 23:45:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 23:45:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 23:45:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 23:45:57,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 23:45:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 23:45:57,999 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 23:45:58,000 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 23:45:58,131 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 23:45:58,138 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 23:45:58,138 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 23:45:58,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:45:58 BoogieIcfgContainer [2021-12-06 23:45:58,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 23:45:58,142 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 23:45:58,142 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 23:45:58,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 23:45:58,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 11:45:57" (1/3) ... [2021-12-06 23:45:58,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fd0ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:45:58, skipping insertion in model container [2021-12-06 23:45:58,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 11:45:57" (2/3) ... [2021-12-06 23:45:58,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fd0ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 11:45:58, skipping insertion in model container [2021-12-06 23:45:58,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 11:45:58" (3/3) ... [2021-12-06 23:45:58,148 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.c [2021-12-06 23:45:58,153 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 23:45:58,153 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 23:45:58,201 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 23:45:58,208 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 23:45:58,208 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 23:45:58,226 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 23:45:58,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 23:45:58,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:45:58,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:45:58,233 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:45:58,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:45:58,238 INFO L85 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2021-12-06 23:45:58,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:45:58,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800609012] [2021-12-06 23:45:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:58,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:45:58,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:58,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:45:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:58,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-06 23:45:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:45:58,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:45:58,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800609012] [2021-12-06 23:45:58,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800609012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:45:58,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:45:58,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 23:45:58,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275027622] [2021-12-06 23:45:58,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:45:58,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 23:45:58,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:45:58,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 23:45:58,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 23:45:58,582 INFO L87 Difference]: Start difference. First operand has 41 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:45:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:45:58,825 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2021-12-06 23:45:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 23:45:58,828 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-12-06 23:45:58,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:45:58,838 INFO L225 Difference]: With dead ends: 74 [2021-12-06 23:45:58,838 INFO L226 Difference]: Without dead ends: 35 [2021-12-06 23:45:58,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:45:58,846 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 39 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:45:58,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 162 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:45:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-06 23:45:58,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-06 23:45:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 23:45:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2021-12-06 23:45:58,885 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2021-12-06 23:45:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:45:58,886 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2021-12-06 23:45:58,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 23:45:58,887 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2021-12-06 23:45:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 23:45:58,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:45:58,889 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:45:58,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 23:45:58,890 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:45:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:45:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2021-12-06 23:45:58,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:45:58,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045755396] [2021-12-06 23:45:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:58,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:45:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:58,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:45:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:45:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:45:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:45:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:45:59,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:45:59,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045755396] [2021-12-06 23:45:59,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045755396] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:45:59,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:45:59,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 23:45:59,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697230605] [2021-12-06 23:45:59,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:45:59,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 23:45:59,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:45:59,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 23:45:59,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-06 23:45:59,075 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 23:45:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:45:59,199 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-12-06 23:45:59,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 23:45:59,199 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-06 23:45:59,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:45:59,201 INFO L225 Difference]: With dead ends: 48 [2021-12-06 23:45:59,201 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 23:45:59,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-06 23:45:59,202 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:45:59,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 133 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:45:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 23:45:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-12-06 23:45:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 27 states have internal predecessors, (29), 9 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-06 23:45:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-12-06 23:45:59,210 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2021-12-06 23:45:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:45:59,210 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-12-06 23:45:59,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-06 23:45:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-12-06 23:45:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-06 23:45:59,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:45:59,212 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-06 23:45:59,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 23:45:59,212 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:45:59,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:45:59,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2021-12-06 23:45:59,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:45:59,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041866683] [2021-12-06 23:45:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:59,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:45:59,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:45:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:45:59,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:45:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:45:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:45:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:45:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:45:59,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:45:59,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041866683] [2021-12-06 23:45:59,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041866683] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:45:59,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763372427] [2021-12-06 23:45:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:45:59,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:45:59,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:45:59,374 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:45:59,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 23:45:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:45:59,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 23:45:59,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:45:59,701 INFO L388 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 [2021-12-06 23:45:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 23:45:59,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:45:59,850 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-06 23:45:59,851 INFO L388 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 11 treesize of output 11 [2021-12-06 23:45:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:45:59,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763372427] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:45:59,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:45:59,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 10] total 22 [2021-12-06 23:45:59,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090401591] [2021-12-06 23:45:59,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:45:59,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 23:45:59,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:45:59,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 23:45:59,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-12-06 23:45:59,890 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 23:46:00,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:00,196 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2021-12-06 23:46:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 23:46:00,197 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2021-12-06 23:46:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:00,198 INFO L225 Difference]: With dead ends: 46 [2021-12-06 23:46:00,198 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 23:46:00,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 23:46:00,200 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:00,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 185 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:46:00,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 23:46:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-12-06 23:46:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-12-06 23:46:00,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-12-06 23:46:00,207 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2021-12-06 23:46:00,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:00,207 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-12-06 23:46:00,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 8 states have call successors, (16), 4 states have call predecessors, (16), 3 states have return successors, (12), 8 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-06 23:46:00,207 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-12-06 23:46:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 23:46:00,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:00,209 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:00,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:46:00,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:00,411 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:00,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:00,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2021-12-06 23:46:00,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:00,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740619398] [2021-12-06 23:46:00,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:00,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:00,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:00,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:00,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:00,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:46:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:00,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:00,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 23:46:00,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:00,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740619398] [2021-12-06 23:46:00,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740619398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:00,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330824893] [2021-12-06 23:46:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:00,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:00,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:00,845 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:00,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:46:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:00,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 23:46:00,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:00,969 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:46:00,972 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:46:01,041 INFO L388 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 19 treesize of output 18 [2021-12-06 23:46:01,045 INFO L388 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 19 treesize of output 18 [2021-12-06 23:46:01,254 INFO L388 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 [2021-12-06 23:46:01,257 INFO L388 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 [2021-12-06 23:46:01,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 23:46:01,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:01,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330824893] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:01,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:46:01,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 26 [2021-12-06 23:46:01,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727472679] [2021-12-06 23:46:01,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:01,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 23:46:01,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 23:46:01,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2021-12-06 23:46:01,595 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 19 states have internal predecessors, (47), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-06 23:46:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:02,204 INFO L93 Difference]: Finished difference Result 97 states and 135 transitions. [2021-12-06 23:46:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 23:46:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 19 states have internal predecessors, (47), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) Word has length 47 [2021-12-06 23:46:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:02,207 INFO L225 Difference]: With dead ends: 97 [2021-12-06 23:46:02,207 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 23:46:02,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=234, Invalid=2628, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 23:46:02,210 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 78 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:02,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 406 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 560 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2021-12-06 23:46:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 23:46:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2021-12-06 23:46:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 52 states have internal predecessors, (60), 15 states have call successors, (15), 6 states have call predecessors, (15), 8 states have return successors, (27), 14 states have call predecessors, (27), 11 states have call successors, (27) [2021-12-06 23:46:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 102 transitions. [2021-12-06 23:46:02,228 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 102 transitions. Word has length 47 [2021-12-06 23:46:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:02,228 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 102 transitions. [2021-12-06 23:46:02,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 19 states have internal predecessors, (47), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-06 23:46:02,229 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 102 transitions. [2021-12-06 23:46:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-06 23:46:02,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:02,232 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:02,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:46:02,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:02,434 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:02,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:02,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2021-12-06 23:46:02,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:02,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438205972] [2021-12-06 23:46:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:02,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:02,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:02,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:02,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:02,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 23:46:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:02,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:02,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:46:02,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:02,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438205972] [2021-12-06 23:46:02,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438205972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:02,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222298049] [2021-12-06 23:46:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:02,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:02,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:02,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:02,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:46:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:02,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-06 23:46:02,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:02,781 INFO L388 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:46:02,784 INFO L388 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:46:02,946 INFO L388 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 [2021-12-06 23:46:02,948 INFO L388 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 [2021-12-06 23:46:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:46:02,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 23:46:03,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222298049] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:46:03,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:46:03,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12] total 21 [2021-12-06 23:46:03,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873048486] [2021-12-06 23:46:03,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:03,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 23:46:03,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:03,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 23:46:03,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:46:03,190 INFO L87 Difference]: Start difference. First operand 73 states and 102 transitions. Second operand has 21 states, 20 states have (on average 2.45) internal successors, (49), 13 states have internal predecessors, (49), 6 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-06 23:46:03,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:03,478 INFO L93 Difference]: Finished difference Result 136 states and 183 transitions. [2021-12-06 23:46:03,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 23:46:03,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 13 states have internal predecessors, (49), 6 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) Word has length 47 [2021-12-06 23:46:03,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:03,481 INFO L225 Difference]: With dead ends: 136 [2021-12-06 23:46:03,481 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 23:46:03,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 92 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-12-06 23:46:03,483 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 42 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:03,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 428 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 325 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2021-12-06 23:46:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 23:46:03,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2021-12-06 23:46:03,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.196969696969697) internal successors, (79), 66 states have internal predecessors, (79), 17 states have call successors, (17), 9 states have call predecessors, (17), 10 states have return successors, (35), 18 states have call predecessors, (35), 12 states have call successors, (35) [2021-12-06 23:46:03,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 131 transitions. [2021-12-06 23:46:03,496 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 131 transitions. Word has length 47 [2021-12-06 23:46:03,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:03,496 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 131 transitions. [2021-12-06 23:46:03,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.45) internal successors, (49), 13 states have internal predecessors, (49), 6 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (13), 9 states have call predecessors, (13), 5 states have call successors, (13) [2021-12-06 23:46:03,496 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 131 transitions. [2021-12-06 23:46:03,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 23:46:03,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:03,498 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:03,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:46:03,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:03,700 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:03,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1292352465, now seen corresponding path program 2 times [2021-12-06 23:46:03,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:03,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733627750] [2021-12-06 23:46:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:03,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:03,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:03,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:03,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:03,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:03,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:03,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:03,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:46:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:04,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:04,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:04,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 23:46:04,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:04,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733627750] [2021-12-06 23:46:04,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733627750] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:04,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462255931] [2021-12-06 23:46:04,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:46:04,049 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:04,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:04,050 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:04,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:46:04,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:46:04,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:46:04,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 23:46:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:04,291 INFO L388 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 19 treesize of output 7 [2021-12-06 23:46:04,293 INFO L388 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 19 treesize of output 7 [2021-12-06 23:46:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 23:46:04,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:12,509 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:46:18,572 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 23:46:18,583 INFO L354 Elim1Store]: treesize reduction 8, result has 46.7 percent of original size [2021-12-06 23:46:18,583 INFO L388 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 25 [2021-12-06 23:46:18,588 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-06 23:46:18,589 INFO L388 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 24 treesize of output 12 [2021-12-06 23:46:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 23:46:18,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462255931] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:46:18,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:46:18,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 26 [2021-12-06 23:46:18,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413275070] [2021-12-06 23:46:18,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:18,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 23:46:18,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:18,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 23:46:18,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=587, Unknown=1, NotChecked=0, Total=650 [2021-12-06 23:46:18,630 INFO L87 Difference]: Start difference. First operand 94 states and 131 transitions. Second operand has 26 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 11 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 23:46:19,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:19,003 INFO L93 Difference]: Finished difference Result 148 states and 206 transitions. [2021-12-06 23:46:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 23:46:19,004 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 11 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) Word has length 57 [2021-12-06 23:46:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:19,006 INFO L225 Difference]: With dead ends: 148 [2021-12-06 23:46:19,006 INFO L226 Difference]: Without dead ends: 129 [2021-12-06 23:46:19,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=163, Invalid=1396, Unknown=1, NotChecked=0, Total=1560 [2021-12-06 23:46:19,008 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 91 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:19,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 281 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 544 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2021-12-06 23:46:19,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-12-06 23:46:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 104. [2021-12-06 23:46:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 74 states have internal predecessors, (91), 17 states have call successors, (17), 9 states have call predecessors, (17), 12 states have return successors, (42), 20 states have call predecessors, (42), 12 states have call successors, (42) [2021-12-06 23:46:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 150 transitions. [2021-12-06 23:46:19,026 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 150 transitions. Word has length 57 [2021-12-06 23:46:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:19,027 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 150 transitions. [2021-12-06 23:46:19,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 11 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 23:46:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 150 transitions. [2021-12-06 23:46:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:46:19,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:19,030 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:19,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:46:19,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:19,231 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:19,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 3 times [2021-12-06 23:46:19,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:19,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970146347] [2021-12-06 23:46:19,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:19,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:46:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 23:46:19,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:19,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970146347] [2021-12-06 23:46:19,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970146347] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:19,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776806684] [2021-12-06 23:46:19,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:46:19,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:19,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:19,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:19,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:46:19,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-06 23:46:19,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:46:19,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 67 conjunts are in the unsatisfiable core [2021-12-06 23:46:19,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:20,387 INFO L388 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 31 treesize of output 19 [2021-12-06 23:46:20,390 INFO L388 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 25 treesize of output 13 [2021-12-06 23:46:20,510 INFO L388 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 [2021-12-06 23:46:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-06 23:46:20,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:21,010 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:46:21,011 INFO L388 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 29 treesize of output 32 [2021-12-06 23:46:21,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776806684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:21,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:46:21,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21] total 45 [2021-12-06 23:46:21,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644870118] [2021-12-06 23:46:21,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:21,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 23:46:21,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 23:46:21,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2926, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 23:46:21,170 INFO L87 Difference]: Start difference. First operand 104 states and 150 transitions. Second operand has 45 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 33 states have internal predecessors, (65), 15 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-06 23:46:23,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:23,404 INFO L93 Difference]: Finished difference Result 221 states and 390 transitions. [2021-12-06 23:46:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 23:46:23,405 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 33 states have internal predecessors, (65), 15 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 70 [2021-12-06 23:46:23,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:23,407 INFO L225 Difference]: With dead ends: 221 [2021-12-06 23:46:23,408 INFO L226 Difference]: Without dead ends: 219 [2021-12-06 23:46:23,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=530, Invalid=6780, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 23:46:23,410 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 152 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:23,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 452 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:46:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-06 23:46:23,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 149. [2021-12-06 23:46:23,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 107 states have (on average 1.233644859813084) internal successors, (132), 109 states have internal predecessors, (132), 21 states have call successors, (21), 11 states have call predecessors, (21), 20 states have return successors, (86), 28 states have call predecessors, (86), 13 states have call successors, (86) [2021-12-06 23:46:23,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 239 transitions. [2021-12-06 23:46:23,435 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 239 transitions. Word has length 70 [2021-12-06 23:46:23,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:23,435 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 239 transitions. [2021-12-06 23:46:23,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 33 states have internal predecessors, (65), 15 states have call successors, (20), 6 states have call predecessors, (20), 9 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-06 23:46:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 239 transitions. [2021-12-06 23:46:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 23:46:23,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:23,437 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:23,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 23:46:23,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:23,639 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2021-12-06 23:46:23,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:23,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215213041] [2021-12-06 23:46:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:23,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:23,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:23,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:23,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:23,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:23,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:23,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:46:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:24,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:24,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:24,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:24,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 22 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 23:46:24,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215213041] [2021-12-06 23:46:24,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215213041] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:24,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23328128] [2021-12-06 23:46:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:24,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:24,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:24,201 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:24,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 23:46:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:24,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 23:46:24,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:24,826 INFO L388 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 25 treesize of output 17 [2021-12-06 23:46:24,828 INFO L388 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 21 treesize of output 13 [2021-12-06 23:46:24,920 INFO L388 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 [2021-12-06 23:46:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 23:46:24,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:25,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:46:25,581 INFO L388 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 35 treesize of output 38 [2021-12-06 23:46:25,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23328128] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:25,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:46:25,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 50 [2021-12-06 23:46:25,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116542513] [2021-12-06 23:46:25,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:25,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 23:46:25,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:25,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 23:46:25,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=3737, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 23:46:25,909 INFO L87 Difference]: Start difference. First operand 149 states and 239 transitions. Second operand has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2021-12-06 23:46:29,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:29,686 INFO L93 Difference]: Finished difference Result 429 states and 802 transitions. [2021-12-06 23:46:29,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 23:46:29,687 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 71 [2021-12-06 23:46:29,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:29,690 INFO L225 Difference]: With dead ends: 429 [2021-12-06 23:46:29,690 INFO L226 Difference]: Without dead ends: 308 [2021-12-06 23:46:29,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2280 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=874, Invalid=11558, Unknown=0, NotChecked=0, Total=12432 [2021-12-06 23:46:29,695 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 187 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 3542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:29,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 450 Invalid, 3542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 3438 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 23:46:29,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-06 23:46:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 183. [2021-12-06 23:46:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 132 states have (on average 1.2348484848484849) internal successors, (163), 136 states have internal predecessors, (163), 22 states have call successors, (22), 11 states have call predecessors, (22), 28 states have return successors, (127), 35 states have call predecessors, (127), 14 states have call successors, (127) [2021-12-06 23:46:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 312 transitions. [2021-12-06 23:46:29,717 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 312 transitions. Word has length 71 [2021-12-06 23:46:29,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:29,717 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 312 transitions. [2021-12-06 23:46:29,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 41 states have (on average 1.6585365853658536) internal successors, (68), 35 states have internal predecessors, (68), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2021-12-06 23:46:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 312 transitions. [2021-12-06 23:46:29,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 23:46:29,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:29,719 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:29,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 23:46:29,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 23:46:29,920 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:29,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:29,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2021-12-06 23:46:29,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:29,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810772408] [2021-12-06 23:46:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:29,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:29,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:29,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:29,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:29,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:30,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:30,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:30,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:46:30,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:30,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:30,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:30,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:30,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 23:46:30,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:30,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810772408] [2021-12-06 23:46:30,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810772408] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:30,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158032980] [2021-12-06 23:46:30,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:46:30,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:30,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:30,096 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:30,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 23:46:30,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:46:30,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:46:30,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 23:46:30,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:30,324 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 23:46:30,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-06 23:46:30,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158032980] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:46:30,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:46:30,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 21 [2021-12-06 23:46:30,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994325620] [2021-12-06 23:46:30,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:30,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 23:46:30,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:30,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 23:46:30,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:46:30,567 INFO L87 Difference]: Start difference. First operand 183 states and 312 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 23:46:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:31,212 INFO L93 Difference]: Finished difference Result 400 states and 814 transitions. [2021-12-06 23:46:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 23:46:31,212 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2021-12-06 23:46:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:31,215 INFO L225 Difference]: With dead ends: 400 [2021-12-06 23:46:31,215 INFO L226 Difference]: Without dead ends: 245 [2021-12-06 23:46:31,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=379, Invalid=1877, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 23:46:31,217 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 124 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:31,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 305 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 23:46:31,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-06 23:46:31,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 195. [2021-12-06 23:46:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 142 states have (on average 1.1901408450704225) internal successors, (169), 144 states have internal predecessors, (169), 22 states have call successors, (22), 11 states have call predecessors, (22), 30 states have return successors, (138), 39 states have call predecessors, (138), 14 states have call successors, (138) [2021-12-06 23:46:31,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 329 transitions. [2021-12-06 23:46:31,233 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 329 transitions. Word has length 71 [2021-12-06 23:46:31,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:31,233 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 329 transitions. [2021-12-06 23:46:31,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 14 states have internal predecessors, (43), 4 states have call successors, (12), 3 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-06 23:46:31,233 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 329 transitions. [2021-12-06 23:46:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 23:46:31,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:31,235 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:31,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 23:46:31,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:31,436 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2021-12-06 23:46:31,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:31,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123652188] [2021-12-06 23:46:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:31,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:31,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:46:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:31,969 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 23:46:31,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:31,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123652188] [2021-12-06 23:46:31,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123652188] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:31,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654444240] [2021-12-06 23:46:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:31,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:31,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:31,971 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:31,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 23:46:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:32,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 23:46:32,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:32,673 INFO L388 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 23 treesize of output 15 [2021-12-06 23:46:32,674 INFO L388 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 19 treesize of output 11 [2021-12-06 23:46:32,773 INFO L388 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 [2021-12-06 23:46:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 23:46:32,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:33,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:46:33,536 INFO L388 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 33 treesize of output 36 [2021-12-06 23:46:34,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654444240] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:34,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:46:34,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 54 [2021-12-06 23:46:34,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885536383] [2021-12-06 23:46:34,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:34,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-06 23:46:34,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:34,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-06 23:46:34,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4625, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 23:46:34,077 INFO L87 Difference]: Start difference. First operand 195 states and 329 transitions. Second operand has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2021-12-06 23:46:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:36,772 INFO L93 Difference]: Finished difference Result 255 states and 434 transitions. [2021-12-06 23:46:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-06 23:46:36,772 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) Word has length 72 [2021-12-06 23:46:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:36,774 INFO L225 Difference]: With dead ends: 255 [2021-12-06 23:46:36,774 INFO L226 Difference]: Without dead ends: 253 [2021-12-06 23:46:36,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2129 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=739, Invalid=10181, Unknown=0, NotChecked=0, Total=10920 [2021-12-06 23:46:36,778 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 160 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 2329 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:36,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 466 Invalid, 2430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2329 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 23:46:36,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-06 23:46:36,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 190. [2021-12-06 23:46:36,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 140 states have internal predecessors, (164), 22 states have call successors, (22), 11 states have call predecessors, (22), 29 states have return successors, (133), 38 states have call predecessors, (133), 14 states have call successors, (133) [2021-12-06 23:46:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 319 transitions. [2021-12-06 23:46:36,796 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 319 transitions. Word has length 72 [2021-12-06 23:46:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:36,796 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 319 transitions. [2021-12-06 23:46:36,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 38 states have internal predecessors, (70), 16 states have call successors, (22), 6 states have call predecessors, (22), 9 states have return successors, (17), 15 states have call predecessors, (17), 12 states have call successors, (17) [2021-12-06 23:46:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 319 transitions. [2021-12-06 23:46:36,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 23:46:36,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:36,799 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:36,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 23:46:36,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:37,000 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:37,002 INFO L85 PathProgramCache]: Analyzing trace with hash 872853690, now seen corresponding path program 1 times [2021-12-06 23:46:37,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:37,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479852582] [2021-12-06 23:46:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:37,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:46:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 23:46:37,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:37,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479852582] [2021-12-06 23:46:37,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479852582] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:37,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162664690] [2021-12-06 23:46:37,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:37,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:37,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:37,424 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:37,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 23:46:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:37,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 23:46:37,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:37,838 INFO L388 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 23 treesize of output 15 [2021-12-06 23:46:37,840 INFO L388 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 19 treesize of output 11 [2021-12-06 23:46:37,907 INFO L388 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 [2021-12-06 23:46:37,932 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-06 23:46:37,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:38,183 INFO L354 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2021-12-06 23:46:38,183 INFO L388 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 23 treesize of output 23 [2021-12-06 23:46:38,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162664690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:38,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:46:38,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 43 [2021-12-06 23:46:38,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713323381] [2021-12-06 23:46:38,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:38,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 23:46:38,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:38,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 23:46:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 23:46:38,303 INFO L87 Difference]: Start difference. First operand 190 states and 319 transitions. Second operand has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-06 23:46:39,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:39,357 INFO L93 Difference]: Finished difference Result 255 states and 415 transitions. [2021-12-06 23:46:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 23:46:39,357 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) Word has length 72 [2021-12-06 23:46:39,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:39,359 INFO L225 Difference]: With dead ends: 255 [2021-12-06 23:46:39,359 INFO L226 Difference]: Without dead ends: 253 [2021-12-06 23:46:39,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=361, Invalid=4469, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 23:46:39,361 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 96 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:39,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 374 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 23:46:39,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-06 23:46:39,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 173. [2021-12-06 23:46:39,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 127 states have (on average 1.204724409448819) internal successors, (153), 125 states have internal predecessors, (153), 21 states have call successors, (21), 10 states have call predecessors, (21), 24 states have return successors, (108), 37 states have call predecessors, (108), 14 states have call successors, (108) [2021-12-06 23:46:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 282 transitions. [2021-12-06 23:46:39,376 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 282 transitions. Word has length 72 [2021-12-06 23:46:39,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:39,376 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 282 transitions. [2021-12-06 23:46:39,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 31 states have internal predecessors, (66), 15 states have call successors, (22), 6 states have call predecessors, (22), 7 states have return successors, (17), 14 states have call predecessors, (17), 11 states have call successors, (17) [2021-12-06 23:46:39,376 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 282 transitions. [2021-12-06 23:46:39,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:46:39,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:39,379 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:39,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 23:46:39,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:39,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1209697001, now seen corresponding path program 2 times [2021-12-06 23:46:39,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:39,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064871132] [2021-12-06 23:46:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:39,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:39,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:46:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:46:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 23:46:39,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:39,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064871132] [2021-12-06 23:46:39,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064871132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:39,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216003862] [2021-12-06 23:46:39,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:46:39,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:39,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:39,811 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:39,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 23:46:39,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:46:39,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:46:39,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 23:46:39,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:39,946 INFO L388 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:46:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 23:46:40,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:46:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 23:46:40,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216003862] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:46:40,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:46:40,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 13] total 30 [2021-12-06 23:46:40,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609012707] [2021-12-06 23:46:40,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:46:40,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 23:46:40,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:46:40,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 23:46:40,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-12-06 23:46:40,420 INFO L87 Difference]: Start difference. First operand 173 states and 282 transitions. Second operand has 30 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-06 23:46:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:46:40,851 INFO L93 Difference]: Finished difference Result 212 states and 357 transitions. [2021-12-06 23:46:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 23:46:40,852 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) Word has length 70 [2021-12-06 23:46:40,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:46:40,853 INFO L225 Difference]: With dead ends: 212 [2021-12-06 23:46:40,854 INFO L226 Difference]: Without dead ends: 196 [2021-12-06 23:46:40,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-12-06 23:46:40,854 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 97 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:46:40,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 444 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 447 Invalid, 0 Unknown, 264 Unchecked, 0.2s Time] [2021-12-06 23:46:40,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-12-06 23:46:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 171. [2021-12-06 23:46:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 125 states have (on average 1.208) internal successors, (151), 123 states have internal predecessors, (151), 22 states have call successors, (22), 11 states have call predecessors, (22), 23 states have return successors, (109), 36 states have call predecessors, (109), 15 states have call successors, (109) [2021-12-06 23:46:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 282 transitions. [2021-12-06 23:46:40,866 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 282 transitions. Word has length 70 [2021-12-06 23:46:40,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:46:40,866 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 282 transitions. [2021-12-06 23:46:40,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 13 states have call successors, (27), 4 states have call predecessors, (27), 11 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-06 23:46:40,866 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 282 transitions. [2021-12-06 23:46:40,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 23:46:40,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:46:40,868 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:46:40,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 23:46:41,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 23:46:41,070 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:46:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:46:41,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1479239555, now seen corresponding path program 3 times [2021-12-06 23:46:41,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:46:41,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205058032] [2021-12-06 23:46:41,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:46:41,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:46:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:46:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:46:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:46:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:46:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:46:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:46:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:46:41,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:46:41,412 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 23:46:41,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:46:41,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205058032] [2021-12-06 23:46:41,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205058032] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:46:41,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781327404] [2021-12-06 23:46:41,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:46:41,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:46:41,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:46:41,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:46:41,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 23:46:41,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 23:46:41,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:46:41,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 100 conjunts are in the unsatisfiable core [2021-12-06 23:46:41,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:46:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:46:41,603 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:46:41,624 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:46:41,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:46:41,643 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:46:41,645 INFO L388 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:46:41,704 INFO L388 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:46:41,706 INFO L388 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 20 treesize of output 19 [2021-12-06 23:46:41,709 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:46:43,770 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_21| Int)) (not (= |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_21| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_task_~n#1.base_BEFORE_CALL_21|) 4)))) is different from true [2021-12-06 23:47:00,150 INFO L388 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 31 treesize of output 19 [2021-12-06 23:47:00,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 23:47:00,163 INFO L388 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 [2021-12-06 23:47:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 18 not checked. [2021-12-06 23:47:00,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:47:02,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781327404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:47:02,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:47:02,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 47 [2021-12-06 23:47:02,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809893532] [2021-12-06 23:47:02,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:47:02,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 23:47:02,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:47:02,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 23:47:02,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2915, Unknown=9, NotChecked=108, Total=3192 [2021-12-06 23:47:02,484 INFO L87 Difference]: Start difference. First operand 171 states and 282 transitions. Second operand has 47 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 35 states have internal predecessors, (71), 17 states have call successors, (23), 8 states have call predecessors, (23), 10 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-06 23:49:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:49:26,488 INFO L93 Difference]: Finished difference Result 268 states and 458 transitions. [2021-12-06 23:49:26,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 23:49:26,488 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 35 states have internal predecessors, (71), 17 states have call successors, (23), 8 states have call predecessors, (23), 10 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) Word has length 70 [2021-12-06 23:49:26,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:49:26,490 INFO L225 Difference]: With dead ends: 268 [2021-12-06 23:49:26,490 INFO L226 Difference]: Without dead ends: 266 [2021-12-06 23:49:26,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 164.0s TimeCoverageRelationStatistics Valid=722, Invalid=10529, Unknown=95, NotChecked=210, Total=11556 [2021-12-06 23:49:26,492 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 139 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 2835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 799 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:49:26,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 496 Invalid, 2835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1963 Invalid, 0 Unknown, 799 Unchecked, 0.7s Time] [2021-12-06 23:49:26,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-12-06 23:49:26,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 245. [2021-12-06 23:49:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 180 states have (on average 1.2166666666666666) internal successors, (219), 179 states have internal predecessors, (219), 29 states have call successors, (29), 14 states have call predecessors, (29), 35 states have return successors, (174), 51 states have call predecessors, (174), 19 states have call successors, (174) [2021-12-06 23:49:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 422 transitions. [2021-12-06 23:49:26,509 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 422 transitions. Word has length 70 [2021-12-06 23:49:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:49:26,510 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 422 transitions. [2021-12-06 23:49:26,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 35 states have internal predecessors, (71), 17 states have call successors, (23), 8 states have call predecessors, (23), 10 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-06 23:49:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 422 transitions. [2021-12-06 23:49:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 23:49:26,512 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:49:26,512 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:49:26,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 23:49:26,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 23:49:26,713 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:49:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:49:26,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2021-12-06 23:49:26,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:49:26,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858983283] [2021-12-06 23:49:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:49:26,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:49:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:26,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:26,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:49:26,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:26,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:49:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:26,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:49:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:26,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:49:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:26,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:49:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:27,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:27,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:27,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:27,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:49:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:27,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:49:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 23:49:27,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:49:27,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858983283] [2021-12-06 23:49:27,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858983283] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:49:27,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432266195] [2021-12-06 23:49:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:49:27,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:49:27,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:49:27,143 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:49:27,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 23:49:27,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 79 conjunts are in the unsatisfiable core [2021-12-06 23:49:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:49:27,695 INFO L388 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 23 treesize of output 15 [2021-12-06 23:49:27,697 INFO L388 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 19 treesize of output 11 [2021-12-06 23:49:27,776 INFO L388 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 [2021-12-06 23:49:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 23:49:27,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:49:28,539 INFO L354 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2021-12-06 23:49:28,539 INFO L388 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 47 treesize of output 30 [2021-12-06 23:49:28,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432266195] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:49:28,753 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:49:28,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 47 [2021-12-06 23:49:28,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782456311] [2021-12-06 23:49:28,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:49:28,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 23:49:28,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:49:28,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 23:49:28,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 23:49:28,755 INFO L87 Difference]: Start difference. First operand 245 states and 422 transitions. Second operand has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 23:49:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:49:30,498 INFO L93 Difference]: Finished difference Result 328 states and 651 transitions. [2021-12-06 23:49:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 23:49:30,499 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 71 [2021-12-06 23:49:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:49:30,502 INFO L225 Difference]: With dead ends: 328 [2021-12-06 23:49:30,502 INFO L226 Difference]: Without dead ends: 326 [2021-12-06 23:49:30,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=546, Invalid=7644, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 23:49:30,503 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 116 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:49:30,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 468 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:49:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-12-06 23:49:30,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 259. [2021-12-06 23:49:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 190 states have (on average 1.2157894736842105) internal successors, (231), 190 states have internal predecessors, (231), 30 states have call successors, (30), 14 states have call predecessors, (30), 38 states have return successors, (194), 54 states have call predecessors, (194), 20 states have call successors, (194) [2021-12-06 23:49:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 455 transitions. [2021-12-06 23:49:30,523 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 455 transitions. Word has length 71 [2021-12-06 23:49:30,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:49:30,523 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 455 transitions. [2021-12-06 23:49:30,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 15 states have call successors, (23), 6 states have call predecessors, (23), 7 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 23:49:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 455 transitions. [2021-12-06 23:49:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-06 23:49:30,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:49:30,526 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:49:30,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 23:49:30,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-06 23:49:30,726 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:49:30,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:49:30,727 INFO L85 PathProgramCache]: Analyzing trace with hash -468191832, now seen corresponding path program 2 times [2021-12-06 23:49:30,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:49:30,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819473691] [2021-12-06 23:49:30,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:49:30,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:49:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:30,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:30,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:49:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:30,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:49:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:30,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:49:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:30,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:49:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:30,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:49:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:30,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:31,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:31,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:49:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:49:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-06 23:49:31,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:49:31,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819473691] [2021-12-06 23:49:31,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819473691] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:49:31,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728870865] [2021-12-06 23:49:31,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:49:31,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:49:31,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:49:31,034 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:49:31,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 23:49:31,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:49:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:49:31,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-06 23:49:31,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:49:31,295 INFO L388 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 23 treesize of output 15 [2021-12-06 23:49:31,297 INFO L388 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 19 treesize of output 11 [2021-12-06 23:49:31,307 INFO L388 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 [2021-12-06 23:49:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-06 23:49:31,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:49:31,531 INFO L354 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2021-12-06 23:49:31,531 INFO L388 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 23 treesize of output 23 [2021-12-06 23:49:31,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728870865] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:49:31,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:49:31,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 30 [2021-12-06 23:49:31,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308858586] [2021-12-06 23:49:31,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:49:31,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 23:49:31,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:49:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 23:49:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 23:49:31,643 INFO L87 Difference]: Start difference. First operand 259 states and 455 transitions. Second operand has 30 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-06 23:49:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:49:32,422 INFO L93 Difference]: Finished difference Result 299 states and 517 transitions. [2021-12-06 23:49:32,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 23:49:32,422 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) Word has length 71 [2021-12-06 23:49:32,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:49:32,426 INFO L225 Difference]: With dead ends: 299 [2021-12-06 23:49:32,426 INFO L226 Difference]: Without dead ends: 297 [2021-12-06 23:49:32,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=284, Invalid=2908, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 23:49:32,427 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 86 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:49:32,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 275 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 23:49:32,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-12-06 23:49:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 256. [2021-12-06 23:49:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 188 states have (on average 1.2127659574468086) internal successors, (228), 187 states have internal predecessors, (228), 30 states have call successors, (30), 14 states have call predecessors, (30), 37 states have return successors, (190), 54 states have call predecessors, (190), 20 states have call successors, (190) [2021-12-06 23:49:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 448 transitions. [2021-12-06 23:49:32,456 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 448 transitions. Word has length 71 [2021-12-06 23:49:32,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:49:32,456 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 448 transitions. [2021-12-06 23:49:32,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.12) internal successors, (53), 23 states have internal predecessors, (53), 12 states have call successors, (21), 4 states have call predecessors, (21), 5 states have return successors, (15), 11 states have call predecessors, (15), 10 states have call successors, (15) [2021-12-06 23:49:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 448 transitions. [2021-12-06 23:49:32,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 23:49:32,459 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:49:32,459 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:49:32,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 23:49:32,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 23:49:32,660 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:49:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:49:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1479346186, now seen corresponding path program 1 times [2021-12-06 23:49:32,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:49:32,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930688657] [2021-12-06 23:49:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:49:32,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:49:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:32,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:32,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:49:32,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:32,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:49:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:32,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:49:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:32,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:49:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:32,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:49:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:32,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:32,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:49:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:33,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:33,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:49:33,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-06 23:49:33,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:49:33,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930688657] [2021-12-06 23:49:33,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930688657] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:49:33,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444616905] [2021-12-06 23:49:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:49:33,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:49:33,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:49:33,099 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:49:33,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 23:49:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:33,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 116 conjunts are in the unsatisfiable core [2021-12-06 23:49:33,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:49:33,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:49:33,314 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:49:33,317 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:49:33,380 INFO L388 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 19 treesize of output 18 [2021-12-06 23:49:33,383 INFO L388 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 19 treesize of output 18 [2021-12-06 23:49:33,420 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:49:33,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:49:33,451 INFO L388 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 19 treesize of output 18 [2021-12-06 23:49:33,453 INFO L388 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 23 treesize of output 22 [2021-12-06 23:49:35,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:49:35,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:49:35,070 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:49:35,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2021-12-06 23:49:35,074 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 23:49:35,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-06 23:49:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-06 23:49:35,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:49:37,831 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_14 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_27 Int)) (or (let ((.cse0 (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_27 8)) (.cse1 (+ |c_nondet_tree_#res.offset| 4))) (and (= (select (select (store |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_14 (store (select |c_#memory_$Pointer$.base| v_nondet_tree_~n~0.base_BEFORE_CALL_14) .cse0 |c_nondet_tree_#res.base|)) |c_nondet_tree_#res.base|) .cse1) 0) (= (select (select (store |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_14 (store (select |c_#memory_$Pointer$.offset| v_nondet_tree_~n~0.base_BEFORE_CALL_14) .cse0 |c_nondet_tree_#res.offset|)) |c_nondet_tree_#res.base|) .cse1) 0))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_14) 0) (not (= 0 v_nondet_tree_~n~0.base_BEFORE_CALL_14)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_27 4) 0)))) is different from false [2021-12-06 23:49:39,928 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_nondet_tree_~n~0.base_BEFORE_CALL_14 Int) (v_nondet_tree_~n~0.offset_BEFORE_CALL_27 Int)) (or (and (forall ((v_ArrVal_1808 Int)) (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base) (+ c_nondet_tree_~n~0.offset 8) v_ArrVal_1808)))) (store .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_14 (store (select .cse0 v_nondet_tree_~n~0.base_BEFORE_CALL_14) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_27 8) c_nondet_tree_~n~0.offset))) c_nondet_tree_~n~0.base) (+ c_nondet_tree_~n~0.offset 4)) 0)) (forall ((v_ArrVal_1809 Int)) (= (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base) (+ c_nondet_tree_~n~0.offset 8) v_ArrVal_1809)))) (store .cse1 v_nondet_tree_~n~0.base_BEFORE_CALL_14 (store (select .cse1 v_nondet_tree_~n~0.base_BEFORE_CALL_14) (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_27 8) c_nondet_tree_~n~0.base))) c_nondet_tree_~n~0.base) (+ c_nondet_tree_~n~0.offset 4)) 0))) (and (= (select |c_old(#valid)| v_nondet_tree_~n~0.base_BEFORE_CALL_14) 0) (not (= 0 v_nondet_tree_~n~0.base_BEFORE_CALL_14)) (= (+ v_nondet_tree_~n~0.offset_BEFORE_CALL_27 4) 0)))) is different from false [2021-12-06 23:49:39,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444616905] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:49:39,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:49:39,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 46 [2021-12-06 23:49:39,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484075229] [2021-12-06 23:49:39,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:49:39,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 23:49:39,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:49:39,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 23:49:39,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2910, Unknown=2, NotChecked=218, Total=3306 [2021-12-06 23:49:39,992 INFO L87 Difference]: Start difference. First operand 256 states and 448 transitions. Second operand has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2021-12-06 23:49:43,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:49:43,156 INFO L93 Difference]: Finished difference Result 609 states and 1208 transitions. [2021-12-06 23:49:43,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-12-06 23:49:43,157 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) Word has length 76 [2021-12-06 23:49:43,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:49:43,162 INFO L225 Difference]: With dead ends: 609 [2021-12-06 23:49:43,162 INFO L226 Difference]: Without dead ends: 596 [2021-12-06 23:49:43,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3329 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=729, Invalid=11933, Unknown=2, NotChecked=446, Total=13110 [2021-12-06 23:49:43,164 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 121 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 2145 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 2978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 2145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 763 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 23:49:43,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 1002 Invalid, 2978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 2145 Invalid, 0 Unknown, 763 Unchecked, 0.9s Time] [2021-12-06 23:49:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-12-06 23:49:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 413. [2021-12-06 23:49:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 307 states have (on average 1.211726384364821) internal successors, (372), 307 states have internal predecessors, (372), 42 states have call successors, (42), 23 states have call predecessors, (42), 63 states have return successors, (332), 82 states have call predecessors, (332), 26 states have call successors, (332) [2021-12-06 23:49:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 746 transitions. [2021-12-06 23:49:43,199 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 746 transitions. Word has length 76 [2021-12-06 23:49:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:49:43,200 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 746 transitions. [2021-12-06 23:49:43,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 34 states have internal predecessors, (79), 18 states have call successors, (23), 10 states have call predecessors, (23), 12 states have return successors, (19), 16 states have call predecessors, (19), 14 states have call successors, (19) [2021-12-06 23:49:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 746 transitions. [2021-12-06 23:49:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 23:49:43,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:49:43,203 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:49:43,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 23:49:43,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:49:43,404 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:49:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:49:43,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1595709832, now seen corresponding path program 4 times [2021-12-06 23:49:43,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:49:43,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270550435] [2021-12-06 23:49:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:49:43,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:49:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:49:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:49:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:49:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:49:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:49:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:49:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:49:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:49:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:49:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 23:49:43,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:49:43,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270550435] [2021-12-06 23:49:43,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270550435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:49:43,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003093674] [2021-12-06 23:49:43,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:49:43,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:49:43,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:49:43,733 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:49:43,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 23:49:43,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:49:43,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:49:43,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 94 conjunts are in the unsatisfiable core [2021-12-06 23:49:43,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:49:43,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:49:43,941 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:49:43,943 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:49:43,978 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:49:43,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:49:44,006 INFO L388 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 23 treesize of output 22 [2021-12-06 23:49:44,010 INFO L388 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 29 treesize of output 28 [2021-12-06 23:49:44,743 INFO L354 Elim1Store]: treesize reduction 21, result has 4.5 percent of original size [2021-12-06 23:49:44,743 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 44 [2021-12-06 23:49:44,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 12 [2021-12-06 23:49:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-06 23:49:44,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:49:46,353 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((nondet_tree_~n~0.offset Int)) (= (select (select (store |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.offset| c_nondet_tree_~n~0.base) (+ nondet_tree_~n~0.offset 8) |c_nondet_tree_#t~ret9.offset|)) |c_nondet_tree_#t~ret9.base|) (+ |c_nondet_tree_#t~ret9.offset| 8)) 0)) (forall ((nondet_tree_~n~0.offset Int)) (= (select (select (store |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base (store (select |c_#memory_$Pointer$.base| c_nondet_tree_~n~0.base) (+ nondet_tree_~n~0.offset 8) |c_nondet_tree_#t~ret9.base|)) |c_nondet_tree_#t~ret9.base|) (+ |c_nondet_tree_#t~ret9.offset| 8)) 0))) is different from false [2021-12-06 23:50:26,727 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 23:50:26,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2021-12-06 23:50:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 49 trivial. 1 not checked. [2021-12-06 23:50:26,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003093674] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:50:26,830 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:50:26,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 48 [2021-12-06 23:50:26,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095325857] [2021-12-06 23:50:26,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:26,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 23:50:26,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:26,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 23:50:26,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2015, Unknown=16, NotChecked=90, Total=2256 [2021-12-06 23:50:26,831 INFO L87 Difference]: Start difference. First operand 413 states and 746 transitions. Second operand has 48 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 31 states have internal predecessors, (90), 14 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (21), 19 states have call predecessors, (21), 10 states have call successors, (21) [2021-12-06 23:50:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:32,216 INFO L93 Difference]: Finished difference Result 624 states and 1103 transitions. [2021-12-06 23:50:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 23:50:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 31 states have internal predecessors, (90), 14 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (21), 19 states have call predecessors, (21), 10 states have call successors, (21) Word has length 76 [2021-12-06 23:50:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:32,222 INFO L225 Difference]: With dead ends: 624 [2021-12-06 23:50:32,222 INFO L226 Difference]: Without dead ends: 599 [2021-12-06 23:50:32,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=318, Invalid=4090, Unknown=18, NotChecked=130, Total=4556 [2021-12-06 23:50:32,224 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 98 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 668 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:32,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 725 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1066 Invalid, 0 Unknown, 668 Unchecked, 0.4s Time] [2021-12-06 23:50:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-12-06 23:50:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 568. [2021-12-06 23:50:32,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 426 states have (on average 1.2136150234741785) internal successors, (517), 423 states have internal predecessors, (517), 56 states have call successors, (56), 33 states have call predecessors, (56), 85 states have return successors, (448), 111 states have call predecessors, (448), 32 states have call successors, (448) [2021-12-06 23:50:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1021 transitions. [2021-12-06 23:50:32,268 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1021 transitions. Word has length 76 [2021-12-06 23:50:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:32,269 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 1021 transitions. [2021-12-06 23:50:32,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 31 states have internal predecessors, (90), 14 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (21), 19 states have call predecessors, (21), 10 states have call successors, (21) [2021-12-06 23:50:32,269 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1021 transitions. [2021-12-06 23:50:32,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-06 23:50:32,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:32,273 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:32,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-12-06 23:50:32,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 23:50:32,474 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:32,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 1 times [2021-12-06 23:50:32,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:32,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535612191] [2021-12-06 23:50:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:32,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:32,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:50:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:50:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:50:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:32,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 23:50:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 23:50:32,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:32,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535612191] [2021-12-06 23:50:32,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535612191] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:32,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932695665] [2021-12-06 23:50:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:32,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:32,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:32,916 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:32,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 23:50:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:33,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 82 conjunts are in the unsatisfiable core [2021-12-06 23:50:33,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:33,667 INFO L388 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 23 treesize of output 15 [2021-12-06 23:50:33,669 INFO L388 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 19 treesize of output 11 [2021-12-06 23:50:33,761 INFO L388 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 [2021-12-06 23:50:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 23:50:33,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:34,721 INFO L354 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2021-12-06 23:50:34,722 INFO L388 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 47 treesize of output 30 [2021-12-06 23:50:35,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932695665] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:35,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:50:35,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31] total 51 [2021-12-06 23:50:35,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821169809] [2021-12-06 23:50:35,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:35,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 23:50:35,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 23:50:35,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4618, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 23:50:35,252 INFO L87 Difference]: Start difference. First operand 568 states and 1021 transitions. Second operand has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 23:50:38,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:38,880 INFO L93 Difference]: Finished difference Result 808 states and 1712 transitions. [2021-12-06 23:50:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-06 23:50:38,880 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) Word has length 72 [2021-12-06 23:50:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:38,887 INFO L225 Difference]: With dead ends: 808 [2021-12-06 23:50:38,887 INFO L226 Difference]: Without dead ends: 806 [2021-12-06 23:50:38,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1095, Invalid=14405, Unknown=0, NotChecked=0, Total=15500 [2021-12-06 23:50:38,889 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 190 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 2441 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:38,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 430 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2441 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 23:50:38,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-12-06 23:50:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 564. [2021-12-06 23:50:38,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 425 states have (on average 1.2164705882352942) internal successors, (517), 419 states have internal predecessors, (517), 55 states have call successors, (55), 33 states have call predecessors, (55), 83 states have return successors, (432), 111 states have call predecessors, (432), 31 states have call successors, (432) [2021-12-06 23:50:38,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1004 transitions. [2021-12-06 23:50:38,945 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1004 transitions. Word has length 72 [2021-12-06 23:50:38,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:38,945 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 1004 transitions. [2021-12-06 23:50:38,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 15 states have call successors, (23), 6 states have call predecessors, (23), 8 states have return successors, (15), 13 states have call predecessors, (15), 11 states have call successors, (15) [2021-12-06 23:50:38,946 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1004 transitions. [2021-12-06 23:50:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-06 23:50:38,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:38,950 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:38,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 23:50:39,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 23:50:39,151 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:39,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:39,151 INFO L85 PathProgramCache]: Analyzing trace with hash 215586468, now seen corresponding path program 3 times [2021-12-06 23:50:39,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:39,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199113100] [2021-12-06 23:50:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:39,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:50:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:50:39,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:50:39,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:50:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:39,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 23 proven. 69 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-06 23:50:39,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:39,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199113100] [2021-12-06 23:50:39,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199113100] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:39,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864230598] [2021-12-06 23:50:39,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 23:50:39,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:39,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:39,724 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:39,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 23:50:39,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 23:50:39,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:50:39,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-06 23:50:39,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:39,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:50:39,971 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:50:39,973 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:50:40,069 WARN L860 $PredicateComparison]: unable to prove that (exists ((nondet_tree_~n~0.base Int) (v_ArrVal_2307 (Array Int Int)) (v_ArrVal_2306 (Array Int Int))) (and (= (store |c_old(#memory_$Pointer$.base)| nondet_tree_~n~0.base v_ArrVal_2306) |c_#memory_$Pointer$.base|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| nondet_tree_~n~0.base v_ArrVal_2307)) (= 0 (select |c_old(#valid)| nondet_tree_~n~0.base)))) is different from true [2021-12-06 23:50:40,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:50:40,085 INFO L388 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 [2021-12-06 23:50:40,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 23:50:40,088 INFO L388 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 [2021-12-06 23:50:40,093 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:50:40,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:50:40,102 INFO L388 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 19 treesize of output 18 [2021-12-06 23:50:40,105 INFO L388 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 19 treesize of output 18 [2021-12-06 23:50:40,366 INFO L388 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 [2021-12-06 23:50:40,368 INFO L388 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 [2021-12-06 23:50:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 177 trivial. 8 not checked. [2021-12-06 23:50:40,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:41,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864230598] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:41,137 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:50:41,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-12-06 23:50:41,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282885553] [2021-12-06 23:50:41,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:41,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 23:50:41,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:41,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 23:50:41,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1158, Unknown=2, NotChecked=68, Total=1332 [2021-12-06 23:50:41,138 INFO L87 Difference]: Start difference. First operand 564 states and 1004 transitions. Second operand has 30 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 21 states have internal predecessors, (66), 12 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-06 23:50:42,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:42,080 INFO L93 Difference]: Finished difference Result 609 states and 1060 transitions. [2021-12-06 23:50:42,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 23:50:42,081 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 21 states have internal predecessors, (66), 12 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) Word has length 97 [2021-12-06 23:50:42,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:42,085 INFO L225 Difference]: With dead ends: 609 [2021-12-06 23:50:42,085 INFO L226 Difference]: Without dead ends: 496 [2021-12-06 23:50:42,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 182 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=309, Invalid=2885, Unknown=2, NotChecked=110, Total=3306 [2021-12-06 23:50:42,087 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 112 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:42,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 456 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 578 Invalid, 0 Unknown, 286 Unchecked, 0.3s Time] [2021-12-06 23:50:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-12-06 23:50:42,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2021-12-06 23:50:42,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 375 states have (on average 1.2106666666666666) internal successors, (454), 369 states have internal predecessors, (454), 49 states have call successors, (49), 30 states have call predecessors, (49), 71 states have return successors, (370), 96 states have call predecessors, (370), 25 states have call successors, (370) [2021-12-06 23:50:42,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 873 transitions. [2021-12-06 23:50:42,127 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 873 transitions. Word has length 97 [2021-12-06 23:50:42,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:42,127 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 873 transitions. [2021-12-06 23:50:42,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 21 states have internal predecessors, (66), 12 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-06 23:50:42,128 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 873 transitions. [2021-12-06 23:50:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 23:50:42,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:42,131 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:42,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 23:50:42,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:42,332 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:42,333 INFO L85 PathProgramCache]: Analyzing trace with hash -700730293, now seen corresponding path program 5 times [2021-12-06 23:50:42,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:42,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497908699] [2021-12-06 23:50:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:42,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:50:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:50:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:50:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 23:50:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:42,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-12-06 23:50:42,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497908699] [2021-12-06 23:50:42,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497908699] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345989739] [2021-12-06 23:50:42,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 23:50:42,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:42,818 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:42,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 23:50:43,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 23:50:43,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:50:43,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 87 conjunts are in the unsatisfiable core [2021-12-06 23:50:43,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:43,353 INFO L388 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:50:43,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:50:43,744 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2021-12-06 23:50:43,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:50:43,750 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2021-12-06 23:50:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-06 23:50:43,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:46,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345989739] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:46,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:50:46,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17] total 33 [2021-12-06 23:50:46,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818033325] [2021-12-06 23:50:46,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:46,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 23:50:46,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:46,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 23:50:46,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1385, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 23:50:46,488 INFO L87 Difference]: Start difference. First operand 496 states and 873 transitions. Second operand has 33 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (15), 12 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-06 23:50:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:47,520 INFO L93 Difference]: Finished difference Result 878 states and 1585 transitions. [2021-12-06 23:50:47,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 23:50:47,520 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (15), 12 states have call predecessors, (15), 7 states have call successors, (15) Word has length 86 [2021-12-06 23:50:47,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:47,525 INFO L225 Difference]: With dead ends: 878 [2021-12-06 23:50:47,525 INFO L226 Difference]: Without dead ends: 853 [2021-12-06 23:50:47,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=238, Invalid=3068, Unknown=0, NotChecked=0, Total=3306 [2021-12-06 23:50:47,526 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 99 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:47,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 364 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1129 Invalid, 0 Unknown, 277 Unchecked, 0.4s Time] [2021-12-06 23:50:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-12-06 23:50:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 567. [2021-12-06 23:50:47,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 429 states have (on average 1.219114219114219) internal successors, (523), 426 states have internal predecessors, (523), 49 states have call successors, (49), 30 states have call predecessors, (49), 88 states have return successors, (469), 110 states have call predecessors, (469), 25 states have call successors, (469) [2021-12-06 23:50:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1041 transitions. [2021-12-06 23:50:47,584 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1041 transitions. Word has length 86 [2021-12-06 23:50:47,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:47,584 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1041 transitions. [2021-12-06 23:50:47,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 25 states have internal predecessors, (68), 12 states have call successors, (21), 7 states have call predecessors, (21), 8 states have return successors, (15), 12 states have call predecessors, (15), 7 states have call successors, (15) [2021-12-06 23:50:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1041 transitions. [2021-12-06 23:50:47,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 23:50:47,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:47,587 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:47,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-06 23:50:47,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:47,789 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:47,789 INFO L85 PathProgramCache]: Analyzing trace with hash 181678716, now seen corresponding path program 4 times [2021-12-06 23:50:47,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:47,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108028496] [2021-12-06 23:50:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:47,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:47,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:48,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:48,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:48,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:48,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:48,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:50:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:48,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:50:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:48,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:50:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:48,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:48,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:48,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:48,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:50:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 23:50:48,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:48,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108028496] [2021-12-06 23:50:48,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108028496] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:48,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106225804] [2021-12-06 23:50:48,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:50:48,330 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:48,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:48,331 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:48,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 23:50:48,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:50:48,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:50:48,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 98 conjunts are in the unsatisfiable core [2021-12-06 23:50:48,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:48,487 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:50:48,494 INFO L388 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:50:48,496 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:50:49,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:50:49,076 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2021-12-06 23:50:49,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:50:49,082 INFO L388 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 42 [2021-12-06 23:50:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-06 23:50:49,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:49,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106225804] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:49,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:50:49,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19] total 39 [2021-12-06 23:50:49,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677027370] [2021-12-06 23:50:49,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:49,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-12-06 23:50:49,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:49,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-12-06 23:50:49,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 23:50:49,494 INFO L87 Difference]: Start difference. First operand 567 states and 1041 transitions. Second operand has 39 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 29 states have internal predecessors, (77), 15 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2021-12-06 23:50:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:53,278 INFO L93 Difference]: Finished difference Result 1364 states and 3561 transitions. [2021-12-06 23:50:53,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 23:50:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 29 states have internal predecessors, (77), 15 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) Word has length 76 [2021-12-06 23:50:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:53,291 INFO L225 Difference]: With dead ends: 1364 [2021-12-06 23:50:53,291 INFO L226 Difference]: Without dead ends: 1351 [2021-12-06 23:50:53,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=526, Invalid=5953, Unknown=1, NotChecked=0, Total=6480 [2021-12-06 23:50:53,293 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 180 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:53,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 441 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1166 Invalid, 0 Unknown, 258 Unchecked, 0.5s Time] [2021-12-06 23:50:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-12-06 23:50:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 955. [2021-12-06 23:50:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 731 states have (on average 1.2352941176470589) internal successors, (903), 718 states have internal predecessors, (903), 68 states have call successors, (68), 46 states have call predecessors, (68), 155 states have return successors, (1118), 190 states have call predecessors, (1118), 34 states have call successors, (1118) [2021-12-06 23:50:53,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 2089 transitions. [2021-12-06 23:50:53,401 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 2089 transitions. Word has length 76 [2021-12-06 23:50:53,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:53,401 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 2089 transitions. [2021-12-06 23:50:53,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 29 states have internal predecessors, (77), 15 states have call successors, (21), 10 states have call predecessors, (21), 11 states have return successors, (19), 13 states have call predecessors, (19), 10 states have call successors, (19) [2021-12-06 23:50:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 2089 transitions. [2021-12-06 23:50:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-06 23:50:53,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:53,411 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:53,432 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 23:50:53,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:53,612 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash 298042362, now seen corresponding path program 2 times [2021-12-06 23:50:53,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:53,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583544418] [2021-12-06 23:50:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:53,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:53,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:53,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:53,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:53,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:50:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:54,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:50:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:54,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:50:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:54,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:54,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:54,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:54,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:54,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:54,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:50:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:54,043 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-06 23:50:54,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:54,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583544418] [2021-12-06 23:50:54,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583544418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:54,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130028935] [2021-12-06 23:50:54,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 23:50:54,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:54,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:54,045 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:54,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 23:50:54,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 23:50:54,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:50:54,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-06 23:50:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:54,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 23:50:54,241 INFO L388 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:50:54,243 INFO L388 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 23:50:54,261 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 23:50:54,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-12-06 23:50:54,270 INFO L388 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 21 treesize of output 20 [2021-12-06 23:50:54,273 INFO L388 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 27 treesize of output 26 [2021-12-06 23:50:54,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-12-06 23:50:54,320 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 23:50:54,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-12-06 23:50:55,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 23:50:55,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 23:50:55,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 37 [2021-12-06 23:50:55,081 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 23:50:55,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-06 23:50:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 33 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-06 23:50:55,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:57,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130028935] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:57,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:50:57,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 35 [2021-12-06 23:50:57,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907702132] [2021-12-06 23:50:57,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:57,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 23:50:57,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 23:50:57,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1765, Unknown=1, NotChecked=0, Total=1892 [2021-12-06 23:50:57,168 INFO L87 Difference]: Start difference. First operand 955 states and 2089 transitions. Second operand has 35 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 24 states have internal predecessors, (67), 11 states have call successors, (22), 10 states have call predecessors, (22), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 23:50:57,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:50:57,941 INFO L93 Difference]: Finished difference Result 1271 states and 2739 transitions. [2021-12-06 23:50:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 23:50:57,942 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 24 states have internal predecessors, (67), 11 states have call successors, (22), 10 states have call predecessors, (22), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) Word has length 76 [2021-12-06 23:50:57,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:50:57,951 INFO L225 Difference]: With dead ends: 1271 [2021-12-06 23:50:57,951 INFO L226 Difference]: Without dead ends: 1246 [2021-12-06 23:50:57,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=261, Invalid=3398, Unknown=1, NotChecked=0, Total=3660 [2021-12-06 23:50:57,953 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 84 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 23:50:57,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 670 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 635 Invalid, 0 Unknown, 244 Unchecked, 0.3s Time] [2021-12-06 23:50:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-12-06 23:50:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1232. [2021-12-06 23:50:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 945 states have (on average 1.2412698412698413) internal successors, (1173), 918 states have internal predecessors, (1173), 89 states have call successors, (89), 56 states have call predecessors, (89), 197 states have return successors, (1422), 257 states have call predecessors, (1422), 49 states have call successors, (1422) [2021-12-06 23:50:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 2684 transitions. [2021-12-06 23:50:58,041 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 2684 transitions. Word has length 76 [2021-12-06 23:50:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:50:58,041 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 2684 transitions. [2021-12-06 23:50:58,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 24 states have internal predecessors, (67), 11 states have call successors, (22), 10 states have call predecessors, (22), 7 states have return successors, (13), 10 states have call predecessors, (13), 8 states have call successors, (13) [2021-12-06 23:50:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 2684 transitions. [2021-12-06 23:50:58,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 23:50:58,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:50:58,049 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:50:58,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-12-06 23:50:58,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 23:50:58,250 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:50:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:50:58,251 INFO L85 PathProgramCache]: Analyzing trace with hash 3776186, now seen corresponding path program 4 times [2021-12-06 23:50:58,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:50:58,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395988326] [2021-12-06 23:50:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:50:58,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:50:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:50:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:50:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-06 23:50:58,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-06 23:50:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:58,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-06 23:50:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:58,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:50:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-06 23:50:58,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:50:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 72 proven. 38 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-12-06 23:50:58,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:50:58,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395988326] [2021-12-06 23:50:58,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395988326] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:58,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289163956] [2021-12-06 23:50:58,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 23:50:58,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:50:58,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:50:58,519 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:50:58,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 23:50:58,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 23:50:58,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 23:50:58,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-06 23:50:58,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:50:58,737 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:50:58,741 INFO L388 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 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 23:50:59,500 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 23:50:59,500 INFO L388 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 58 treesize of output 28 [2021-12-06 23:50:59,504 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-12-06 23:50:59,504 INFO L388 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 52 treesize of output 22 [2021-12-06 23:50:59,513 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 69 proven. 37 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-12-06 23:50:59,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:50:59,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289163956] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:50:59,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 23:50:59,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-12-06 23:50:59,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553210781] [2021-12-06 23:50:59,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 23:50:59,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 23:50:59,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:50:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 23:50:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-12-06 23:50:59,761 INFO L87 Difference]: Start difference. First operand 1232 states and 2684 transitions. Second operand has 24 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 13 states have call successors, (24), 4 states have call predecessors, (24), 9 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-06 23:51:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:51:00,371 INFO L93 Difference]: Finished difference Result 1356 states and 3107 transitions. [2021-12-06 23:51:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 23:51:00,371 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 13 states have call successors, (24), 4 states have call predecessors, (24), 9 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) Word has length 110 [2021-12-06 23:51:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:51:00,381 INFO L225 Difference]: With dead ends: 1356 [2021-12-06 23:51:00,381 INFO L226 Difference]: Without dead ends: 1275 [2021-12-06 23:51:00,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 23:51:00,383 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 51 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 23:51:00,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 402 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 485 Invalid, 0 Unknown, 196 Unchecked, 0.2s Time] [2021-12-06 23:51:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-12-06 23:51:00,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1144. [2021-12-06 23:51:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1144 states, 868 states have (on average 1.2384792626728112) internal successors, (1075), 857 states have internal predecessors, (1075), 84 states have call successors, (84), 53 states have call predecessors, (84), 191 states have return successors, (1380), 233 states have call predecessors, (1380), 49 states have call successors, (1380) [2021-12-06 23:51:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1144 states to 1144 states and 2539 transitions. [2021-12-06 23:51:00,468 INFO L78 Accepts]: Start accepts. Automaton has 1144 states and 2539 transitions. Word has length 110 [2021-12-06 23:51:00,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:51:00,468 INFO L470 AbstractCegarLoop]: Abstraction has 1144 states and 2539 transitions. [2021-12-06 23:51:00,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 13 states have call successors, (24), 4 states have call predecessors, (24), 9 states have return successors, (21), 15 states have call predecessors, (21), 12 states have call successors, (21) [2021-12-06 23:51:00,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1144 states and 2539 transitions. [2021-12-06 23:51:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-06 23:51:00,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:51:00,476 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 23:51:00,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 23:51:00,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b39db549-aca9-470a-b4a6-1347f90ad334/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-06 23:51:00,677 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting checkErr0ASSERT_VIOLATIONERROR_FUNCTION === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:51:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:51:00,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1679039551, now seen corresponding path program 5 times [2021-12-06 23:51:00,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:51:00,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965627030] [2021-12-06 23:51:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:51:00,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:51:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:00,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 23:51:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:00,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:51:00,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:00,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:51:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:02,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-06 23:51:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:51:02,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-06 23:51:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat