./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array19_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array19_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX --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 21ab39d122ec2c6e96fa6b8c9d53d6f966068253a8a3d3ba32389613dd7dc54a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:32:53,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:32:53,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:32:53,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:32:53,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:32:53,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:32:53,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:32:53,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:32:53,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:32:53,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:32:53,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:32:53,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:32:53,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:32:53,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:32:53,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:32:53,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:32:53,886 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:32:53,888 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:32:53,890 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:32:53,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:32:53,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:32:53,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:32:53,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:32:53,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:32:53,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:32:53,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:32:53,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:32:53,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:32:53,915 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:32:53,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:32:53,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:32:53,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:32:53,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:32:53,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:32:53,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:32:53,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:32:53,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:32:53,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:32:53,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:32:53,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:32:53,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:32:53,926 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:32:53,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:32:53,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:32:53,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:32:53,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:32:53,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:32:53,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:32:53,982 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:32:53,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:32:53,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:32:53,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:32:53,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:32:53,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:32:53,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:32:53,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:32:53,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:32:53,984 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:32:53,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:32:53,984 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:32:53,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:32:53,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:32:53,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:32:53,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:32:53,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:53,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:32:53,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:32:53,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:32:53,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:32:53,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:32:53,987 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:32:53,987 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:32:53,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:32:53,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:32:53,987 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_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21ab39d122ec2c6e96fa6b8c9d53d6f966068253a8a3d3ba32389613dd7dc54a [2021-11-09 09:32:54,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:32:54,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:32:54,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:32:54,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:32:54,269 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:32:54,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/array-patterns/array19_pattern.c [2021-11-09 09:32:54,352 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/data/3b3bbb8d9/bb7fb54f0fa24db4ba7536463a1c5ca9/FLAGc23f368b6 [2021-11-09 09:32:54,832 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:32:54,833 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/sv-benchmarks/c/array-patterns/array19_pattern.c [2021-11-09 09:32:54,849 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/data/3b3bbb8d9/bb7fb54f0fa24db4ba7536463a1c5ca9/FLAGc23f368b6 [2021-11-09 09:32:55,198 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/data/3b3bbb8d9/bb7fb54f0fa24db4ba7536463a1c5ca9 [2021-11-09 09:32:55,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:32:55,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:32:55,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:55,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:32:55,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:32:55,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ec1801c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55, skipping insertion in model container [2021-11-09 09:32:55,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:32:55,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:32:55,406 WARN L228 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_61b8d596-d6bf-4e74-9e8b-b24068338e8a/sv-benchmarks/c/array-patterns/array19_pattern.c[1442,1455] [2021-11-09 09:32:55,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:55,436 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:32:55,449 WARN L228 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_61b8d596-d6bf-4e74-9e8b-b24068338e8a/sv-benchmarks/c/array-patterns/array19_pattern.c[1442,1455] [2021-11-09 09:32:55,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:32:55,477 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:32:55,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55 WrapperNode [2021-11-09 09:32:55,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:32:55,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:55,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:32:55,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:32:55,487 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:32:55,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:32:55,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:32:55,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:32:55,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:32:55,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:32:55,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:32:55,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:32:55,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (1/1) ... [2021-11-09 09:32:55,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:32:55,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:55,607 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:32:55,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:32:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:32:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:32:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:32:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:32:55,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:32:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:32:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:32:55,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:32:55,941 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-09 09:32:55,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:55 BoogieIcfgContainer [2021-11-09 09:32:55,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:32:55,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:32:55,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:32:55,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:32:55,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:32:55" (1/3) ... [2021-11-09 09:32:55,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a1f2914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:55, skipping insertion in model container [2021-11-09 09:32:55,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:32:55" (2/3) ... [2021-11-09 09:32:55,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a1f2914 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:32:55, skipping insertion in model container [2021-11-09 09:32:55,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:32:55" (3/3) ... [2021-11-09 09:32:55,953 INFO L111 eAbstractionObserver]: Analyzing ICFG array19_pattern.c [2021-11-09 09:32:55,972 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:32:55,973 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 09:32:56,023 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:32:56,030 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 [2021-11-09 09:32:56,030 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 09:32:56,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:56,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:32:56,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:56,052 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:56,052 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:56,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1763201290, now seen corresponding path program 1 times [2021-11-09 09:32:56,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:56,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623755189] [2021-11-09 09:32:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:56,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:56,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:56,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623755189] [2021-11-09 09:32:56,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623755189] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:56,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:56,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:32:56,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445383612] [2021-11-09 09:32:56,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:32:56,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:56,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:32:56,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:32:56,298 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:56,316 INFO L93 Difference]: Finished difference Result 57 states and 88 transitions. [2021-11-09 09:32:56,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:32:56,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-09 09:32:56,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:56,327 INFO L225 Difference]: With dead ends: 57 [2021-11-09 09:32:56,327 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 09:32:56,330 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:32:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 09:32:56,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-09 09:32:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2021-11-09 09:32:56,364 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 11 [2021-11-09 09:32:56,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:56,365 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2021-11-09 09:32:56,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2021-11-09 09:32:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 09:32:56,373 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:56,373 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:56,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:32:56,374 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:56,378 INFO L85 PathProgramCache]: Analyzing trace with hash -204009896, now seen corresponding path program 1 times [2021-11-09 09:32:56,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:56,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048099570] [2021-11-09 09:32:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:56,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:56,419 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:56,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245983195] [2021-11-09 09:32:56,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:56,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:56,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:56,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:56,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:32:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:56,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:32:56,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:32:56,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:56,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048099570] [2021-11-09 09:32:56,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:56,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245983195] [2021-11-09 09:32:56,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245983195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:56,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:56,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:32:56,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381900255] [2021-11-09 09:32:56,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:32:56,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:56,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:32:56,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:56,745 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:56,771 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-09 09:32:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:32:56,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-09 09:32:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:56,772 INFO L225 Difference]: With dead ends: 33 [2021-11-09 09:32:56,773 INFO L226 Difference]: Without dead ends: 29 [2021-11-09 09:32:56,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:56,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-09 09:32:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-09 09:32:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:56,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-09 09:32:56,779 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 19 [2021-11-09 09:32:56,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:56,780 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-09 09:32:56,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:56,780 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-09 09:32:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 09:32:56,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:56,781 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:56,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:56,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:56,999 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash 285952244, now seen corresponding path program 1 times [2021-11-09 09:32:57,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:57,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816952996] [2021-11-09 09:32:57,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:57,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:57,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:57,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113690219] [2021-11-09 09:32:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:57,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:57,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:57,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:57,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:32:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:57,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:32:57,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 09:32:57,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:57,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816952996] [2021-11-09 09:32:57,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:57,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113690219] [2021-11-09 09:32:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113690219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:57,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:57,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:32:57,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058497170] [2021-11-09 09:32:57,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:32:57,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:32:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:57,290 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:57,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:57,515 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2021-11-09 09:32:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:32:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-09 09:32:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:57,517 INFO L225 Difference]: With dead ends: 61 [2021-11-09 09:32:57,518 INFO L226 Difference]: Without dead ends: 39 [2021-11-09 09:32:57,519 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:32:57,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-09 09:32:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2021-11-09 09:32:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-11-09 09:32:57,535 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 24 [2021-11-09 09:32:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:57,536 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-11-09 09:32:57,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:57,536 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-11-09 09:32:57,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 09:32:57,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:57,539 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:57,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-09 09:32:57,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:57,755 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:57,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:57,756 INFO L85 PathProgramCache]: Analyzing trace with hash -785938365, now seen corresponding path program 1 times [2021-11-09 09:32:57,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:57,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513352910] [2021-11-09 09:32:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:57,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:57,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:57,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263525505] [2021-11-09 09:32:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:57,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:57,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:57,781 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:57,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:32:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:57,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:32:57,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:32:57,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:32:57,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513352910] [2021-11-09 09:32:57,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:32:57,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263525505] [2021-11-09 09:32:57,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263525505] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:32:57,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:32:57,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:32:57,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114722525] [2021-11-09 09:32:57,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:32:57,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:32:57,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:32:57,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:32:57,997 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:58,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:32:58,087 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-11-09 09:32:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:32:58,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-09 09:32:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:32:58,089 INFO L225 Difference]: With dead ends: 58 [2021-11-09 09:32:58,089 INFO L226 Difference]: Without dead ends: 33 [2021-11-09 09:32:58,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:32:58,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-09 09:32:58,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-11-09 09:32:58,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-11-09 09:32:58,108 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 27 [2021-11-09 09:32:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:32:58,108 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-11-09 09:32:58,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:32:58,109 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-11-09 09:32:58,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:32:58,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:32:58,110 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:32:58,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:32:58,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:58,324 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:32:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:32:58,324 INFO L85 PathProgramCache]: Analyzing trace with hash 817488613, now seen corresponding path program 1 times [2021-11-09 09:32:58,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:32:58,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929213807] [2021-11-09 09:32:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:58,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:32:58,343 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:32:58,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464805789] [2021-11-09 09:32:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:32:58,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:32:58,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:32:58,355 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:32:58,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:32:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:32:58,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:32:58,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:32:58,658 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 15 treesize of output 11 [2021-11-09 09:32:58,676 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 15 treesize of output 11 [2021-11-09 09:32:59,603 INFO L354 Elim1Store]: treesize reduction 422, result has 9.2 percent of original size [2021-11-09 09:32:59,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 327 treesize of output 357 [2021-11-09 09:32:59,711 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 43 treesize of output 22 [2021-11-09 09:32:59,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:59,788 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2021-11-09 09:32:59,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:59,808 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 54 [2021-11-09 09:32:59,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:59,847 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 30 [2021-11-09 09:32:59,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:59,862 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2021-11-09 09:32:59,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:32:59,887 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 33 [2021-11-09 09:32:59,900 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-09 09:32:59,901 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 51 treesize of output 26 [2021-11-09 09:33:00,094 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 56 treesize of output 52 [2021-11-09 09:33:00,111 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 53 treesize of output 49 [2021-11-09 09:33:00,135 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 36 treesize of output 32 [2021-11-09 09:33:00,147 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:00,166 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 58 treesize of output 54 [2021-11-09 09:33:00,181 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 55 treesize of output 51 [2021-11-09 09:33:00,203 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 36 treesize of output 32 [2021-11-09 09:33:00,220 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:00,525 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-09 09:33:00,525 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 69 treesize of output 35 [2021-11-09 09:33:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:00,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:00,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929213807] [2021-11-09 09:33:00,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:00,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464805789] [2021-11-09 09:33:00,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464805789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:00,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:00,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-09 09:33:00,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374753956] [2021-11-09 09:33:00,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:33:00,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:33:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:33:00,611 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:01,686 INFO L93 Difference]: Finished difference Result 100 states and 123 transitions. [2021-11-09 09:33:01,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:33:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:33:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:01,689 INFO L225 Difference]: With dead ends: 100 [2021-11-09 09:33:01,689 INFO L226 Difference]: Without dead ends: 78 [2021-11-09 09:33:01,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:33:01,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-09 09:33:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 53. [2021-11-09 09:33:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-11-09 09:33:01,699 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 29 [2021-11-09 09:33:01,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:01,699 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-11-09 09:33:01,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:01,700 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-11-09 09:33:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:33:01,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:01,701 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:01,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:01,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:01,915 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:01,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:01,915 INFO L85 PathProgramCache]: Analyzing trace with hash -462375065, now seen corresponding path program 1 times [2021-11-09 09:33:01,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:01,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369281773] [2021-11-09 09:33:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:01,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:01,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:01,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307005693] [2021-11-09 09:33:01,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:01,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:01,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:01,943 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:01,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:33:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 09:33:02,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:33:02,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:02,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369281773] [2021-11-09 09:33:02,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:02,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307005693] [2021-11-09 09:33:02,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307005693] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:33:02,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:33:02,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:33:02,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303416931] [2021-11-09 09:33:02,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 09:33:02,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:02,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 09:33:02,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:33:02,147 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:02,196 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2021-11-09 09:33:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 09:33:02,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:33:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:02,198 INFO L225 Difference]: With dead ends: 89 [2021-11-09 09:33:02,199 INFO L226 Difference]: Without dead ends: 69 [2021-11-09 09:33:02,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 09:33:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-09 09:33:02,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2021-11-09 09:33:02,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:02,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2021-11-09 09:33:02,214 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 29 [2021-11-09 09:33:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:02,215 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2021-11-09 09:33:02,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2021-11-09 09:33:02,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-09 09:33:02,219 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:02,219 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:02,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:02,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:02,443 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:02,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:02,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1049181079, now seen corresponding path program 1 times [2021-11-09 09:33:02,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:02,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684178196] [2021-11-09 09:33:02,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:02,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:02,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:02,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523738075] [2021-11-09 09:33:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:02,475 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:02,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:02,485 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:02,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:33:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:33:02,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:33:02,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:33:02,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:02,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684178196] [2021-11-09 09:33:02,872 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:02,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523738075] [2021-11-09 09:33:02,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523738075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:02,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:02,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 09:33:02,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035583256] [2021-11-09 09:33:02,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:33:02,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:02,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:33:02,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:33:02,879 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:03,231 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2021-11-09 09:33:03,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:33:03,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-09 09:33:03,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:03,232 INFO L225 Difference]: With dead ends: 118 [2021-11-09 09:33:03,233 INFO L226 Difference]: Without dead ends: 96 [2021-11-09 09:33:03,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:33:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-09 09:33:03,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-11-09 09:33:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 70 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2021-11-09 09:33:03,243 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 29 [2021-11-09 09:33:03,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:03,244 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2021-11-09 09:33:03,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2021-11-09 09:33:03,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:33:03,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:03,245 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:03,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:03,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 09:33:03,471 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:03,471 INFO L85 PathProgramCache]: Analyzing trace with hash -212199577, now seen corresponding path program 2 times [2021-11-09 09:33:03,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:03,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433172260] [2021-11-09 09:33:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:03,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:03,482 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:03,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606110272] [2021-11-09 09:33:03,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:33:03,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:03,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:03,483 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:03,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:33:03,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:33:03,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:03,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:33:03,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:03,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:03,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433172260] [2021-11-09 09:33:03,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:03,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606110272] [2021-11-09 09:33:03,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606110272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:03,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:03,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:33:03,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236051062] [2021-11-09 09:33:03,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:33:03,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:03,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:33:03,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:33:03,815 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:03,977 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2021-11-09 09:33:03,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:33:03,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 09:33:03,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:03,979 INFO L225 Difference]: With dead ends: 163 [2021-11-09 09:33:03,979 INFO L226 Difference]: Without dead ends: 118 [2021-11-09 09:33:03,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:33:03,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-09 09:33:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 80. [2021-11-09 09:33:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-11-09 09:33:03,993 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 31 [2021-11-09 09:33:03,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:03,994 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-11-09 09:33:03,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:03,994 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-11-09 09:33:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:33:03,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:04,000 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:04,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:04,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:04,215 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:04,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:04,216 INFO L85 PathProgramCache]: Analyzing trace with hash -182444793, now seen corresponding path program 3 times [2021-11-09 09:33:04,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:04,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670039089] [2021-11-09 09:33:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:04,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:04,227 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:04,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245630498] [2021-11-09 09:33:04,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:33:04,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:04,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:04,229 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:04,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:33:04,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:33:04,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:04,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:33:04,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:04,974 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 56 treesize of output 52 [2021-11-09 09:33:04,989 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 53 treesize of output 49 [2021-11-09 09:33:05,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:05,020 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 36 treesize of output 32 [2021-11-09 09:33:05,042 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 55 treesize of output 51 [2021-11-09 09:33:05,056 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 58 treesize of output 54 [2021-11-09 09:33:05,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:05,098 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 36 treesize of output 32 [2021-11-09 09:33:05,360 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-09 09:33:05,360 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 69 treesize of output 35 [2021-11-09 09:33:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:33:05,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:05,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670039089] [2021-11-09 09:33:05,426 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:05,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245630498] [2021-11-09 09:33:05,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245630498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:05,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:05,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-09 09:33:05,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232643882] [2021-11-09 09:33:05,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:33:05,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:33:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:33:05,428 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:06,344 INFO L93 Difference]: Finished difference Result 190 states and 224 transitions. [2021-11-09 09:33:06,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:33:06,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 09:33:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:06,346 INFO L225 Difference]: With dead ends: 190 [2021-11-09 09:33:06,347 INFO L226 Difference]: Without dead ends: 159 [2021-11-09 09:33:06,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:33:06,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-09 09:33:06,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 113. [2021-11-09 09:33:06,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 112 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:06,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-11-09 09:33:06,360 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 31 [2021-11-09 09:33:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:06,360 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-11-09 09:33:06,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-11-09 09:33:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:33:06,361 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:06,361 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:06,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-09 09:33:06,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:06,566 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:06,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2049114485, now seen corresponding path program 2 times [2021-11-09 09:33:06,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:06,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788927835] [2021-11-09 09:33:06,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:06,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:06,596 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:06,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596476836] [2021-11-09 09:33:06,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:33:06,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:06,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:06,609 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:06,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:33:06,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:33:06,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:06,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:33:06,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:33:06,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:06,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788927835] [2021-11-09 09:33:06,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:06,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596476836] [2021-11-09 09:33:06,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596476836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:06,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:06,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:33:06,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316521363] [2021-11-09 09:33:06,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:33:06,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:06,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:33:06,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:33:06,947 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:07,091 INFO L93 Difference]: Finished difference Result 140 states and 162 transitions. [2021-11-09 09:33:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:33:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-09 09:33:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:07,093 INFO L225 Difference]: With dead ends: 140 [2021-11-09 09:33:07,093 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 09:33:07,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:33:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 09:33:07,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 101. [2021-11-09 09:33:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.18) internal successors, (118), 100 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:07,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2021-11-09 09:33:07,111 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 31 [2021-11-09 09:33:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:07,112 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2021-11-09 09:33:07,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:07,112 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2021-11-09 09:33:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:33:07,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:07,115 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:07,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:07,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:33:07,331 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:07,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:07,331 INFO L85 PathProgramCache]: Analyzing trace with hash 924471561, now seen corresponding path program 4 times [2021-11-09 09:33:07,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:07,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623369174] [2021-11-09 09:33:07,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:07,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:07,348 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:07,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599421467] [2021-11-09 09:33:07,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:33:07,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:07,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:07,358 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:07,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:33:07,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:33:07,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:07,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:33:07,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:07,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 09:33:07,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:07,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623369174] [2021-11-09 09:33:07,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:07,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599421467] [2021-11-09 09:33:07,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599421467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:07,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:07,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:33:07,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748070581] [2021-11-09 09:33:07,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:33:07,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:07,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:33:07,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:33:07,698 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:07,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:07,845 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2021-11-09 09:33:07,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:33:07,846 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 09:33:07,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:07,847 INFO L225 Difference]: With dead ends: 138 [2021-11-09 09:33:07,847 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 09:33:07,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:33:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 09:33:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-11-09 09:33:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1666666666666667) internal successors, (112), 96 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:07,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 112 transitions. [2021-11-09 09:33:07,858 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 112 transitions. Word has length 33 [2021-11-09 09:33:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:07,858 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 112 transitions. [2021-11-09 09:33:07,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 112 transitions. [2021-11-09 09:33:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:33:07,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:07,859 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:07,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:08,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:08,075 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:08,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1164461191, now seen corresponding path program 5 times [2021-11-09 09:33:08,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:08,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269162554] [2021-11-09 09:33:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:08,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:08,096 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:08,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574805190] [2021-11-09 09:33:08,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:33:08,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:08,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:08,104 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:08,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:33:08,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:33:08,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:08,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:33:08,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 09:33:08,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:33:08,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269162554] [2021-11-09 09:33:08,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-09 09:33:08,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574805190] [2021-11-09 09:33:08,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574805190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:33:08,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:33:08,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-11-09 09:33:08,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181252743] [2021-11-09 09:33:08,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:33:08,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:33:08,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:33:08,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:33:08,466 INFO L87 Difference]: Start difference. First operand 97 states and 112 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:33:08,609 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2021-11-09 09:33:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:33:08,610 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 09:33:08,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:33:08,611 INFO L225 Difference]: With dead ends: 112 [2021-11-09 09:33:08,611 INFO L226 Difference]: Without dead ends: 54 [2021-11-09 09:33:08,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:33:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-09 09:33:08,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2021-11-09 09:33:08,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:08,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-11-09 09:33:08,617 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 34 [2021-11-09 09:33:08,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:33:08,617 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-11-09 09:33:08,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:33:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-11-09 09:33:08,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:33:08,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:33:08,618 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:33:08,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:33:08,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:08,827 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:33:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:33:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash -451868680, now seen corresponding path program 6 times [2021-11-09 09:33:08,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:33:08,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365623130] [2021-11-09 09:33:08,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:33:08,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:33:08,837 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-09 09:33:08,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398619274] [2021-11-09 09:33:08,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:33:08,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:33:08,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:33:08,839 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:33:08,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61b8d596-d6bf-4e74-9e8b-b24068338e8a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:33:09,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:33:09,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:33:09,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 09:33:09,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:33:09,528 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 21 treesize of output 17 [2021-11-09 09:33:09,538 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 19 treesize of output 15 [2021-11-09 09:33:09,674 INFO L354 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2021-11-09 09:33:09,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 91 [2021-11-09 09:33:09,700 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-09 09:33:09,701 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 48 treesize of output 19 [2021-11-09 09:33:09,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:09,757 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 22 [2021-11-09 09:33:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,240 INFO L354 Elim1Store]: treesize reduction 154, result has 16.3 percent of original size [2021-11-09 09:33:10,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 108 [2021-11-09 09:33:10,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,296 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:33:10,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 18 [2021-11-09 09:33:10,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 21 [2021-11-09 09:33:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:10,904 INFO L354 Elim1Store]: treesize reduction 204, result has 12.8 percent of original size [2021-11-09 09:33:10,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 145 treesize of output 193 [2021-11-09 09:33:11,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,073 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-11-09 09:33:11,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 114 treesize of output 57 [2021-11-09 09:33:11,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:11,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 60 [2021-11-09 09:33:13,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:13,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,212 INFO L354 Elim1Store]: treesize reduction 605, result has 27.0 percent of original size [2021-11-09 09:33:14,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 4 select indices, 4 select index equivalence classes, 24 disjoint index pairs (out of 6 index pairs), introduced 12 new quantified variables, introduced 17 case distinctions, treesize of input 373 treesize of output 800 [2021-11-09 09:33:14,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,628 INFO L244 Elim1Store]: Index analysis took 152 ms [2021-11-09 09:33:14,634 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:33:14,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 49 [2021-11-09 09:33:14,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:14,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,866 INFO L244 Elim1Store]: Index analysis took 149 ms [2021-11-09 09:33:14,873 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:33:14,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 49 [2021-11-09 09:33:14,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:14,999 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:33:15,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 120 [2021-11-09 09:33:15,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,295 INFO L244 Elim1Store]: Index analysis took 130 ms [2021-11-09 09:33:15,300 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:33:15,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 113 [2021-11-09 09:33:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,549 INFO L354 Elim1Store]: treesize reduction 10, result has 85.1 percent of original size [2021-11-09 09:33:15,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 147 treesize of output 149 [2021-11-09 09:33:15,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:15,876 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:33:15,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 209 treesize of output 117 [2021-11-09 09:33:16,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:16,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:16,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:16,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:16,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:16,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:16,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:16,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:16,133 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:33:16,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 61 [2021-11-09 09:33:17,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:20,059 INFO L354 Elim1Store]: treesize reduction 1956, result has 16.6 percent of original size [2021-11-09 09:33:20,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 377 treesize of output 704 [2021-11-09 09:33:20,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:20,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:20,586 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:20,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:21,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:21,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:21,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:21,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-09 09:33:22,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:33:22,469 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 09:33:22,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 533 treesize of output 428 [2021-11-09 09:34:39,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:39,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:34:46,677 WARN L207 SmtUtils]: Spent 6.75 s on a formula simplification. DAG size of input: 115 DAG size of output: 59 [2021-11-09 09:34:46,679 INFO L354 Elim1Store]: treesize reduction 559, result has 24.3 percent of original size [2021-11-09 09:34:46,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 868 treesize of output 791