./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/insertion_sort-2.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_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/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_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/insertion_sort-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/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_976e03ec-9c91-4caa-813c-daad2e9bc04d/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 e6909fdbd47ee7cc9ac1cfcb139a86d0e022eb1f9eab8a625d6818fa3999b29d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:33:25,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:33:25,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:33:25,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:33:25,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:33:25,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:33:25,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:33:25,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:33:25,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:33:25,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:33:25,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:33:25,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:33:25,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:33:25,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:33:25,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:33:25,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:33:25,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:33:25,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:33:25,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:33:25,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:33:25,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:33:25,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:33:25,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:33:25,503 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:33:25,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:33:25,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:33:25,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:33:25,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:33:25,510 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:33:25,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:33:25,512 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:33:25,513 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:33:25,514 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:33:25,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:33:25,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:33:25,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:33:25,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:33:25,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:33:25,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:33:25,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:33:25,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:33:25,522 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 08:33:25,554 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:33:25,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:33:25,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:33:25,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:33:25,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:33:25,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:33:25,558 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:33:25,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:33:25,558 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:33:25,558 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:33:25,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:33:25,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:33:25,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 08:33:25,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:33:25,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 08:33:25,560 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:33:25,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:33:25,561 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:33:25,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 08:33:25,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:33:25,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:33:25,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:33:25,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:33:25,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:33:25,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:33:25,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 08:33:25,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:33:25,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:33:25,563 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 08:33:25,565 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 08:33:25,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 08:33:25,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:33:25,565 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_976e03ec-9c91-4caa-813c-daad2e9bc04d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6909fdbd47ee7cc9ac1cfcb139a86d0e022eb1f9eab8a625d6818fa3999b29d [2021-11-09 08:33:25,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:33:25,857 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:33:25,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:33:25,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:33:25,870 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:33:25,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/loops/insertion_sort-2.c [2021-11-09 08:33:25,958 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/data/e1b3a3473/77df6ad852774817b8fe05fc41a06e8b/FLAG7946b11d4 [2021-11-09 08:33:26,524 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:33:26,525 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/sv-benchmarks/c/loops/insertion_sort-2.c [2021-11-09 08:33:26,537 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/data/e1b3a3473/77df6ad852774817b8fe05fc41a06e8b/FLAG7946b11d4 [2021-11-09 08:33:26,871 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/data/e1b3a3473/77df6ad852774817b8fe05fc41a06e8b [2021-11-09 08:33:26,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:33:26,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:33:26,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:33:26,882 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:33:26,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:33:26,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:33:26" (1/1) ... [2021-11-09 08:33:26,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a19437c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:26, skipping insertion in model container [2021-11-09 08:33:26,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:33:26" (1/1) ... [2021-11-09 08:33:26,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:33:26,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:33:27,065 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_976e03ec-9c91-4caa-813c-daad2e9bc04d/sv-benchmarks/c/loops/insertion_sort-2.c[328,341] [2021-11-09 08:33:27,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:33:27,102 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:33:27,112 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_976e03ec-9c91-4caa-813c-daad2e9bc04d/sv-benchmarks/c/loops/insertion_sort-2.c[328,341] [2021-11-09 08:33:27,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:33:27,133 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:33:27,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27 WrapperNode [2021-11-09 08:33:27,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:33:27,135 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:33:27,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:33:27,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:33:27,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (1/1) ... [2021-11-09 08:33:27,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (1/1) ... [2021-11-09 08:33:27,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:33:27,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:33:27,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:33:27,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:33:27,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (1/1) ... [2021-11-09 08:33:27,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (1/1) ... [2021-11-09 08:33:27,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (1/1) ... [2021-11-09 08:33:27,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (1/1) ... [2021-11-09 08:33:27,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (1/1) ... [2021-11-09 08:33:27,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (1/1) ... [2021-11-09 08:33:27,193 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (1/1) ... [2021-11-09 08:33:27,196 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:33:27,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:33:27,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:33:27,197 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:33:27,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (1/1) ... [2021-11-09 08:33:27,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:33:27,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:27,231 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:33:27,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:33:27,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:33:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:33:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:33:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:33:27,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:33:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:33:27,282 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:33:27,672 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:33:27,683 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-09 08:33:27,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:33:27 BoogieIcfgContainer [2021-11-09 08:33:27,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:33:27,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:33:27,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:33:27,691 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:33:27,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:33:26" (1/3) ... [2021-11-09 08:33:27,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f63337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:33:27, skipping insertion in model container [2021-11-09 08:33:27,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:33:27" (2/3) ... [2021-11-09 08:33:27,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f63337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:33:27, skipping insertion in model container [2021-11-09 08:33:27,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:33:27" (3/3) ... [2021-11-09 08:33:27,696 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.c [2021-11-09 08:33:27,702 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:33:27,702 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-09 08:33:27,768 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:33:27,776 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 08:33:27,777 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-09 08:33:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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 08:33:27,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 08:33:27,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:27,819 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:27,819 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:27,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1991822609, now seen corresponding path program 1 times [2021-11-09 08:33:27,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:27,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483346870] [2021-11-09 08:33:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:27,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:27,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:28,063 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 08:33:28,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:28,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483346870] [2021-11-09 08:33:28,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483346870] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:28,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:28,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:33:28,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953240060] [2021-11-09 08:33:28,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 08:33:28,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:28,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 08:33:28,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 08:33:28,110 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:28,129 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-09 08:33:28,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 08:33:28,130 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-09 08:33:28,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:28,140 INFO L225 Difference]: With dead ends: 40 [2021-11-09 08:33:28,140 INFO L226 Difference]: Without dead ends: 18 [2021-11-09 08:33:28,143 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 08:33:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-09 08:33:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-09 08:33:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 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 08:33:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-11-09 08:33:28,179 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 9 [2021-11-09 08:33:28,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:28,180 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-11-09 08:33:28,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:28,181 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-11-09 08:33:28,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 08:33:28,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:28,182 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:28,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:33:28,183 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:28,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:28,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2015834155, now seen corresponding path program 1 times [2021-11-09 08:33:28,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:28,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621303541] [2021-11-09 08:33:28,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:28,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:28,379 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 08:33:28,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:28,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621303541] [2021-11-09 08:33:28,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621303541] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:28,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:28,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 08:33:28,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008652414] [2021-11-09 08:33:28,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:33:28,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:33:28,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:33:28,384 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:28,450 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-09 08:33:28,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:33:28,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-09 08:33:28,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:28,454 INFO L225 Difference]: With dead ends: 37 [2021-11-09 08:33:28,454 INFO L226 Difference]: Without dead ends: 20 [2021-11-09 08:33:28,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:33:28,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-09 08:33:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-09 08:33:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 08:33:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-09 08:33:28,461 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2021-11-09 08:33:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:28,461 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-09 08:33:28,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:28,461 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-09 08:33:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 08:33:28,462 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:28,462 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:28,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:33:28,463 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:28,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1565261075, now seen corresponding path program 1 times [2021-11-09 08:33:28,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:28,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429030317] [2021-11-09 08:33:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:28,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:28,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:28,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429030317] [2021-11-09 08:33:28,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429030317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:28,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679118808] [2021-11-09 08:33:28,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:28,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:28,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:28,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:28,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:33:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:33:28,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:33:29,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679118808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:29,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:33:29,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2021-11-09 08:33:29,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152253000] [2021-11-09 08:33:29,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:33:29,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:29,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:33:29,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-09 08:33:29,125 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 08:33:29,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:29,178 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2021-11-09 08:33:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:33:29,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 08:33:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:29,180 INFO L225 Difference]: With dead ends: 33 [2021-11-09 08:33:29,180 INFO L226 Difference]: Without dead ends: 25 [2021-11-09 08:33:29,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:33:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-09 08:33:29,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-11-09 08:33:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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 08:33:29,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-09 08:33:29,188 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2021-11-09 08:33:29,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:29,188 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-09 08:33:29,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 08:33:29,189 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-09 08:33:29,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 08:33:29,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:29,191 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:29,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:29,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:29,406 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:29,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1929667994, now seen corresponding path program 1 times [2021-11-09 08:33:29,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:29,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794056559] [2021-11-09 08:33:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:29,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:29,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:29,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:29,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794056559] [2021-11-09 08:33:29,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794056559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:29,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679549619] [2021-11-09 08:33:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:29,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:29,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:29,553 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:29,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:33:29,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:29,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:33:29,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:29,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679549619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:29,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:29,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-09 08:33:29,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129491925] [2021-11-09 08:33:29,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:33:29,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:33:29,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:33:29,758 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 08:33:29,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:29,816 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-11-09 08:33:29,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:33:29,817 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 17 [2021-11-09 08:33:29,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:29,818 INFO L225 Difference]: With dead ends: 43 [2021-11-09 08:33:29,819 INFO L226 Difference]: Without dead ends: 28 [2021-11-09 08:33:29,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:33:29,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-09 08:33:29,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-11-09 08:33:29,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:29,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-09 08:33:29,828 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 17 [2021-11-09 08:33:29,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:29,828 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-09 08:33:29,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 08:33:29,829 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-09 08:33:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:33:29,830 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:29,831 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:29,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:30,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:30,054 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:30,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:30,054 INFO L85 PathProgramCache]: Analyzing trace with hash 797223332, now seen corresponding path program 2 times [2021-11-09 08:33:30,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:30,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357283443] [2021-11-09 08:33:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:30,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:30,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:30,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357283443] [2021-11-09 08:33:30,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357283443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:30,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482945279] [2021-11-09 08:33:30,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:33:30,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:30,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:30,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:30,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:33:30,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:33:30,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:30,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:33:30,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:31,033 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:33:31,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-09 08:33:31,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:33:31,156 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:33:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:31,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482945279] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:31,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:31,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2021-11-09 08:33:31,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019782952] [2021-11-09 08:33:31,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:33:31,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:31,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:33:31,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:33:31,187 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 08:33:31,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:31,839 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2021-11-09 08:33:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:33:31,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 19 [2021-11-09 08:33:31,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:31,842 INFO L225 Difference]: With dead ends: 68 [2021-11-09 08:33:31,842 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 08:33:31,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=885, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:33:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 08:33:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 32. [2021-11-09 08:33:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 31 states have internal predecessors, (40), 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 08:33:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-11-09 08:33:31,851 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 19 [2021-11-09 08:33:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:31,852 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-11-09 08:33:31,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 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 08:33:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-11-09 08:33:31,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:33:31,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:31,853 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:31,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:32,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:32,062 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:32,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:32,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1477281702, now seen corresponding path program 1 times [2021-11-09 08:33:32,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:32,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960502085] [2021-11-09 08:33:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:32,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:32,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:32,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960502085] [2021-11-09 08:33:32,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960502085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:33:32,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:33:32,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 08:33:32,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657167864] [2021-11-09 08:33:32,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 08:33:32,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 08:33:32,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 08:33:32,120 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 08:33:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:32,155 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2021-11-09 08:33:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 08:33:32,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 08:33:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:32,158 INFO L225 Difference]: With dead ends: 68 [2021-11-09 08:33:32,158 INFO L226 Difference]: Without dead ends: 45 [2021-11-09 08:33:32,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 08:33:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-09 08:33:32,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2021-11-09 08:33:32,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 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 08:33:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-09 08:33:32,164 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2021-11-09 08:33:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:32,165 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-09 08:33:32,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 08:33:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-09 08:33:32,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 08:33:32,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:32,166 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:32,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 08:33:32,167 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:32,167 INFO L85 PathProgramCache]: Analyzing trace with hash -815236263, now seen corresponding path program 1 times [2021-11-09 08:33:32,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:32,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142304192] [2021-11-09 08:33:32,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:32,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:32,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:32,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:32,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142304192] [2021-11-09 08:33:32,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142304192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:32,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874934767] [2021-11-09 08:33:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:32,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:32,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:32,550 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:32,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:33:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:32,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 08:33:32,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:32,831 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:33:32,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 38 [2021-11-09 08:33:33,112 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-11-09 08:33:33,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 42 [2021-11-09 08:33:33,395 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-11-09 08:33:33,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 45 [2021-11-09 08:33:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:33:33,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874934767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:33,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:33,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2021-11-09 08:33:33,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207357074] [2021-11-09 08:33:33,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:33:33,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:33,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:33:33,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:33:33,434 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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 08:33:34,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:34,659 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2021-11-09 08:33:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 08:33:34,660 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-09 08:33:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:34,661 INFO L225 Difference]: With dead ends: 108 [2021-11-09 08:33:34,661 INFO L226 Difference]: Without dead ends: 85 [2021-11-09 08:33:34,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=1731, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:33:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-09 08:33:34,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 37. [2021-11-09 08:33:34,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2021-11-09 08:33:34,670 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 22 [2021-11-09 08:33:34,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:34,670 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2021-11-09 08:33:34,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 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 08:33:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2021-11-09 08:33:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 08:33:34,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:34,672 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:34,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:34,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:34,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:34,886 INFO L85 PathProgramCache]: Analyzing trace with hash 755836794, now seen corresponding path program 1 times [2021-11-09 08:33:34,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:34,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476997396] [2021-11-09 08:33:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:34,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:33:34,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:34,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476997396] [2021-11-09 08:33:34,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476997396] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:34,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7237298] [2021-11-09 08:33:34,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:34,999 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:35,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:35,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:35,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:33:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:35,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 08:33:35,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:33:35,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7237298] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:35,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:35,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-11-09 08:33:35,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225273150] [2021-11-09 08:33:35,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:33:35,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:35,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:33:35,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:33:35,260 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 08:33:35,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:35,395 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2021-11-09 08:33:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:33:35,396 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 23 [2021-11-09 08:33:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:35,397 INFO L225 Difference]: With dead ends: 104 [2021-11-09 08:33:35,397 INFO L226 Difference]: Without dead ends: 61 [2021-11-09 08:33:35,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:33:35,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-09 08:33:35,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2021-11-09 08:33:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 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 08:33:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-11-09 08:33:35,404 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 23 [2021-11-09 08:33:35,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:35,405 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-11-09 08:33:35,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 08:33:35,405 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-11-09 08:33:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-09 08:33:35,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:35,406 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:35,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:35,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-09 08:33:35,607 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:35,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:35,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1879558005, now seen corresponding path program 3 times [2021-11-09 08:33:35,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:35,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817629721] [2021-11-09 08:33:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:35,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:36,101 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:36,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:36,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817629721] [2021-11-09 08:33:36,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817629721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:36,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983021524] [2021-11-09 08:33:36,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:33:36,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:36,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:36,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:36,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:33:36,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:33:36,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:33:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:36,476 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:33:36,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:33:36,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:36,662 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:33:36,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-09 08:33:36,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:33:36,736 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:33:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:33:36,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983021524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:36,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:36,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 21 [2021-11-09 08:33:36,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268376399] [2021-11-09 08:33:36,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:33:36,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:33:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:33:36,771 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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 08:33:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:37,428 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2021-11-09 08:33:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:33:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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 08:33:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:37,430 INFO L225 Difference]: With dead ends: 137 [2021-11-09 08:33:37,430 INFO L226 Difference]: Without dead ends: 111 [2021-11-09 08:33:37,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:33:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-09 08:33:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 55. [2021-11-09 08:33:37,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2021-11-09 08:33:37,439 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 27 [2021-11-09 08:33:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:37,440 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2021-11-09 08:33:37,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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 08:33:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2021-11-09 08:33:37,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:33:37,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:37,441 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:37,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:37,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-09 08:33:37,669 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:37,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:37,670 INFO L85 PathProgramCache]: Analyzing trace with hash 17457638, now seen corresponding path program 1 times [2021-11-09 08:33:37,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:37,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957508208] [2021-11-09 08:33:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:37,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:37,989 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:33:37,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:37,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957508208] [2021-11-09 08:33:37,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957508208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:37,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820460765] [2021-11-09 08:33:37,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:37,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:37,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:37,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:38,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:33:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:38,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:33:38,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:38,411 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:33:38,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-09 08:33:38,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:33:38,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:33:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:33:38,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820460765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:38,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:38,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-11-09 08:33:38,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124779510] [2021-11-09 08:33:38,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:33:38,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:38,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:33:38,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:33:38,539 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 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 08:33:39,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:39,535 INFO L93 Difference]: Finished difference Result 183 states and 224 transitions. [2021-11-09 08:33:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-09 08:33:39,536 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 08:33:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:39,538 INFO L225 Difference]: With dead ends: 183 [2021-11-09 08:33:39,538 INFO L226 Difference]: Without dead ends: 157 [2021-11-09 08:33:39,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=2743, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:33:39,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-09 08:33:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 67. [2021-11-09 08:33:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 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 08:33:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2021-11-09 08:33:39,550 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 30 [2021-11-09 08:33:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:39,550 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2021-11-09 08:33:39,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 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 08:33:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2021-11-09 08:33:39,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-09 08:33:39,552 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:39,552 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:39,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:39,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 08:33:39,777 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:39,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:39,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1513919954, now seen corresponding path program 2 times [2021-11-09 08:33:39,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:39,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914952778] [2021-11-09 08:33:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:39,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:40,319 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:33:40,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:40,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914952778] [2021-11-09 08:33:40,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914952778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:40,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40194088] [2021-11-09 08:33:40,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:33:40,321 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:40,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:40,323 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:40,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:33:40,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:33:40,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 08:33:40,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:40,693 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:33:40,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2021-11-09 08:33:40,995 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-11-09 08:33:40,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 42 [2021-11-09 08:33:41,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:33:41,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:33:41,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-09 08:33:41,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141981475] [2021-11-09 08:33:41,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:33:41,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:41,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:33:41,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:33:41,141 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:41,991 INFO L93 Difference]: Finished difference Result 130 states and 159 transitions. [2021-11-09 08:33:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:33:41,992 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-09 08:33:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:41,992 INFO L225 Difference]: With dead ends: 130 [2021-11-09 08:33:41,992 INFO L226 Difference]: Without dead ends: 103 [2021-11-09 08:33:41,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:33:41,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-09 08:33:42,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 60. [2021-11-09 08:33:42,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 59 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:42,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-11-09 08:33:42,002 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 30 [2021-11-09 08:33:42,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:42,003 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-11-09 08:33:42,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:42,003 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-11-09 08:33:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 08:33:42,004 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:42,005 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:42,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:42,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:42,229 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:42,230 INFO L85 PathProgramCache]: Analyzing trace with hash 406516939, now seen corresponding path program 2 times [2021-11-09 08:33:42,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:42,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56133116] [2021-11-09 08:33:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:42,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:42,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:42,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56133116] [2021-11-09 08:33:42,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56133116] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:42,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162547477] [2021-11-09 08:33:42,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:33:42,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:42,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:42,429 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:42,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:33:42,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:33:42,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:42,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:33:42,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:42,811 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 25 treesize of output 21 [2021-11-09 08:33:42,880 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 08:33:42,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-09 08:33:42,969 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:33:42,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-11-09 08:33:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:33:42,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162547477] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:42,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:42,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 17 [2021-11-09 08:33:42,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683327298] [2021-11-09 08:33:42,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:33:42,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:42,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:33:42,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:33:42,998 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 08:33:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:43,398 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2021-11-09 08:33:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:33:43,400 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 08:33:43,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:43,401 INFO L225 Difference]: With dead ends: 104 [2021-11-09 08:33:43,402 INFO L226 Difference]: Without dead ends: 102 [2021-11-09 08:33:43,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:33:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-09 08:33:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-11-09 08:33:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 67 states have internal predecessors, (83), 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 08:33:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2021-11-09 08:33:43,412 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 31 [2021-11-09 08:33:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:43,413 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2021-11-09 08:33:43,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 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 08:33:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2021-11-09 08:33:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 08:33:43,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:43,414 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:43,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:43,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:43,629 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash 663077847, now seen corresponding path program 3 times [2021-11-09 08:33:43,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:43,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311571383] [2021-11-09 08:33:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:43,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:43,957 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:33:43,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:43,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311571383] [2021-11-09 08:33:43,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311571383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:43,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612203694] [2021-11-09 08:33:43,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:33:43,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:43,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:43,959 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:43,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:33:44,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:33:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 08:33:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:44,333 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:33:44,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-09 08:33:44,569 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-11-09 08:33:44,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 42 [2021-11-09 08:33:44,833 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-11-09 08:33:44,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 45 [2021-11-09 08:33:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-09 08:33:44,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612203694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:44,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:44,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-11-09 08:33:44,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161527870] [2021-11-09 08:33:44,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:33:44,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:44,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:33:44,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:33:44,868 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 08:33:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:46,904 INFO L93 Difference]: Finished difference Result 189 states and 230 transitions. [2021-11-09 08:33:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 08:33:46,905 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 08:33:46,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:46,906 INFO L225 Difference]: With dead ends: 189 [2021-11-09 08:33:46,906 INFO L226 Difference]: Without dead ends: 154 [2021-11-09 08:33:46,908 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=504, Invalid=3918, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 08:33:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-09 08:33:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 71. [2021-11-09 08:33:46,928 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 08:33:46,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2021-11-09 08:33:46,929 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 33 [2021-11-09 08:33:46,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:46,929 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2021-11-09 08:33:46,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 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 08:33:46,930 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2021-11-09 08:33:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 08:33:46,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:46,937 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:46,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:47,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:47,162 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:47,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:47,162 INFO L85 PathProgramCache]: Analyzing trace with hash -661066052, now seen corresponding path program 1 times [2021-11-09 08:33:47,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:47,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359210660] [2021-11-09 08:33:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:47,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:47,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:47,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359210660] [2021-11-09 08:33:47,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359210660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:47,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102706779] [2021-11-09 08:33:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:47,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:47,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:47,456 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:47,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:33:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:33:47,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:47,872 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 08:33:47,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2021-11-09 08:33:48,046 INFO L354 Elim1Store]: treesize reduction 86, result has 9.5 percent of original size [2021-11-09 08:33:48,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 36 [2021-11-09 08:33:48,167 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:33:48,167 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 54 treesize of output 30 [2021-11-09 08:33:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:33:48,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102706779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:48,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:48,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 19 [2021-11-09 08:33:48,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304170498] [2021-11-09 08:33:48,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:33:48,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:48,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:33:48,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:33:48,201 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:48,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:48,832 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2021-11-09 08:33:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 08:33:48,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-09 08:33:48,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:48,833 INFO L225 Difference]: With dead ends: 120 [2021-11-09 08:33:48,833 INFO L226 Difference]: Without dead ends: 118 [2021-11-09 08:33:48,834 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:33:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-09 08:33:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2021-11-09 08:33:48,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 73 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:48,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2021-11-09 08:33:48,844 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 34 [2021-11-09 08:33:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:48,845 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2021-11-09 08:33:48,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:33:48,845 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2021-11-09 08:33:48,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 08:33:48,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:48,846 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:48,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:49,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:49,061 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:49,062 INFO L85 PathProgramCache]: Analyzing trace with hash -305428703, now seen corresponding path program 3 times [2021-11-09 08:33:49,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:49,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911694673] [2021-11-09 08:33:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:49,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 08:33:49,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:49,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911694673] [2021-11-09 08:33:49,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911694673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:49,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389846346] [2021-11-09 08:33:49,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:33:49,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:49,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:49,191 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:49,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:33:49,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 08:33:49,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:49,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 08:33:49,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:33:49,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389846346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:49,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:49,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-11-09 08:33:49,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079316323] [2021-11-09 08:33:49,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-09 08:33:49,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:49,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-09 08:33:49,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-09 08:33:49,720 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 08:33:49,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:49,933 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2021-11-09 08:33:49,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:33:49,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 35 [2021-11-09 08:33:49,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:49,934 INFO L225 Difference]: With dead ends: 181 [2021-11-09 08:33:49,935 INFO L226 Difference]: Without dead ends: 130 [2021-11-09 08:33:49,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:33:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-09 08:33:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2021-11-09 08:33:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 104 states have internal predecessors, (122), 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 08:33:49,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 122 transitions. [2021-11-09 08:33:49,950 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 122 transitions. Word has length 35 [2021-11-09 08:33:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:49,950 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 122 transitions. [2021-11-09 08:33:49,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 08:33:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 122 transitions. [2021-11-09 08:33:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 08:33:49,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:49,952 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:49,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:50,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:50,157 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:50,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:50,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1379930067, now seen corresponding path program 1 times [2021-11-09 08:33:50,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:50,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151711062] [2021-11-09 08:33:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:50,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:50,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:50,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151711062] [2021-11-09 08:33:50,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151711062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:50,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434158868] [2021-11-09 08:33:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:50,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:50,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:50,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:50,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:33:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:51,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 08:33:51,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:51,413 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:33:51,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:33:51,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:51,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:51,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:51,556 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:33:51,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-11-09 08:33:51,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:51,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:51,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:51,815 INFO L354 Elim1Store]: treesize reduction 185, result has 9.8 percent of original size [2021-11-09 08:33:51,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 44 [2021-11-09 08:33:52,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:52,180 INFO L354 Elim1Store]: treesize reduction 118, result has 24.4 percent of original size [2021-11-09 08:33:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 65 [2021-11-09 08:33:52,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:33:52,378 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:33:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:33:52,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434158868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:52,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:52,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 35 [2021-11-09 08:33:52,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420660611] [2021-11-09 08:33:52,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:33:52,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:52,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:33:52,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:33:52,414 INFO L87 Difference]: Start difference. First operand 105 states and 122 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 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 08:33:54,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:33:54,416 INFO L93 Difference]: Finished difference Result 236 states and 275 transitions. [2021-11-09 08:33:54,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 08:33:54,417 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-09 08:33:54,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:33:54,418 INFO L225 Difference]: With dead ends: 236 [2021-11-09 08:33:54,418 INFO L226 Difference]: Without dead ends: 179 [2021-11-09 08:33:54,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=675, Invalid=4437, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 08:33:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-09 08:33:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 141. [2021-11-09 08:33:54,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1714285714285715) internal successors, (164), 140 states have internal predecessors, (164), 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 08:33:54,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 164 transitions. [2021-11-09 08:33:54,439 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 164 transitions. Word has length 37 [2021-11-09 08:33:54,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:33:54,439 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 164 transitions. [2021-11-09 08:33:54,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 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 08:33:54,440 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 164 transitions. [2021-11-09 08:33:54,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:33:54,440 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:33:54,441 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:33:54,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:33:54,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:33:54,665 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:33:54,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:33:54,666 INFO L85 PathProgramCache]: Analyzing trace with hash -306701003, now seen corresponding path program 2 times [2021-11-09 08:33:54,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:33:54,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594454145] [2021-11-09 08:33:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:33:54,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:33:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:33:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:33:55,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:33:55,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594454145] [2021-11-09 08:33:55,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594454145] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:55,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178208106] [2021-11-09 08:33:55,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:33:55,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:33:55,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:33:55,340 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:33:55,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 08:33:55,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:33:55,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:33:55,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:33:55,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:33:55,910 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:33:55,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:33:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:56,109 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:33:56,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:33:56,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:56,266 INFO L354 Elim1Store]: treesize reduction 122, result has 18.7 percent of original size [2021-11-09 08:33:56,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 51 [2021-11-09 08:33:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:33:56,466 INFO L354 Elim1Store]: treesize reduction 190, result has 23.4 percent of original size [2021-11-09 08:33:56,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 84 [2021-11-09 08:33:56,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:33:56,565 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:33:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:33:56,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178208106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:33:56,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:33:56,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 26 [2021-11-09 08:33:56,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742300827] [2021-11-09 08:33:56,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 08:33:56,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:33:56,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 08:33:56,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-11-09 08:33:56,598 INFO L87 Difference]: Start difference. First operand 141 states and 164 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:01,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:01,112 INFO L93 Difference]: Finished difference Result 301 states and 358 transitions. [2021-11-09 08:34:01,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:34:01,112 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 08:34:01,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:01,114 INFO L225 Difference]: With dead ends: 301 [2021-11-09 08:34:01,115 INFO L226 Difference]: Without dead ends: 299 [2021-11-09 08:34:01,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=479, Invalid=2491, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 08:34:01,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-09 08:34:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 162. [2021-11-09 08:34:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2111801242236024) internal successors, (195), 161 states have internal predecessors, (195), 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 08:34:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 195 transitions. [2021-11-09 08:34:01,142 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 195 transitions. Word has length 38 [2021-11-09 08:34:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:01,143 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 195 transitions. [2021-11-09 08:34:01,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:01,143 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 195 transitions. [2021-11-09 08:34:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:34:01,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:01,144 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:01,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:01,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:34:01,357 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:01,358 INFO L85 PathProgramCache]: Analyzing trace with hash -558214917, now seen corresponding path program 3 times [2021-11-09 08:34:01,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:01,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666054609] [2021-11-09 08:34:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:01,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:01,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:01,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:01,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666054609] [2021-11-09 08:34:01,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666054609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:01,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562756322] [2021-11-09 08:34:01,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:34:01,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:01,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:01,872 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:01,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 08:34:02,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:34:02,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:02,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:34:02,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:02,647 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:34:02,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:34:02,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:02,815 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:34:02,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-09 08:34:02,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:34:02,876 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:34:02,900 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:34:02,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562756322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:02,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:02,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 25 [2021-11-09 08:34:02,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849057387] [2021-11-09 08:34:02,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 08:34:02,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 08:34:02,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-11-09 08:34:02,903 INFO L87 Difference]: Start difference. First operand 162 states and 195 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 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 08:34:03,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:03,883 INFO L93 Difference]: Finished difference Result 336 states and 419 transitions. [2021-11-09 08:34:03,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:34:03,883 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-09 08:34:03,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:03,885 INFO L225 Difference]: With dead ends: 336 [2021-11-09 08:34:03,885 INFO L226 Difference]: Without dead ends: 274 [2021-11-09 08:34:03,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:34:03,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-09 08:34:03,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 174. [2021-11-09 08:34:03,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.2254335260115607) internal successors, (212), 173 states have internal predecessors, (212), 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 08:34:03,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 212 transitions. [2021-11-09 08:34:03,912 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 212 transitions. Word has length 38 [2021-11-09 08:34:03,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:03,912 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 212 transitions. [2021-11-09 08:34:03,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 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 08:34:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 212 transitions. [2021-11-09 08:34:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-09 08:34:03,922 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:03,923 INFO L513 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:03,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:04,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:34:04,133 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:04,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:04,134 INFO L85 PathProgramCache]: Analyzing trace with hash -2011283546, now seen corresponding path program 2 times [2021-11-09 08:34:04,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:04,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576324427] [2021-11-09 08:34:04,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:04,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:04,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:04,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576324427] [2021-11-09 08:34:04,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576324427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:04,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595670614] [2021-11-09 08:34:04,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:34:04,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:04,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:04,837 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:04,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 08:34:05,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:34:05,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:05,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-09 08:34:05,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:05,399 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:34:05,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-09 08:34:05,639 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-11-09 08:34:05,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 38 [2021-11-09 08:34:05,721 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:34:05,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:34:05,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 08:34:05,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490449834] [2021-11-09 08:34:05,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:34:05,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:05,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:34:05,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:34:05,723 INFO L87 Difference]: Start difference. First operand 174 states and 212 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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 08:34:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:07,151 INFO L93 Difference]: Finished difference Result 293 states and 355 transitions. [2021-11-09 08:34:07,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:34:07,152 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-09 08:34:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:07,155 INFO L225 Difference]: With dead ends: 293 [2021-11-09 08:34:07,155 INFO L226 Difference]: Without dead ends: 261 [2021-11-09 08:34:07,157 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=381, Invalid=3041, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:34:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-09 08:34:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 132. [2021-11-09 08:34:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.2671755725190839) internal successors, (166), 131 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 166 transitions. [2021-11-09 08:34:07,180 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 166 transitions. Word has length 40 [2021-11-09 08:34:07,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:07,180 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 166 transitions. [2021-11-09 08:34:07,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 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 08:34:07,181 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2021-11-09 08:34:07,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:34:07,182 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:07,182 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:07,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:07,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:07,405 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:07,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1940573146, now seen corresponding path program 4 times [2021-11-09 08:34:07,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:07,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243715753] [2021-11-09 08:34:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:07,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:34:07,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:07,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243715753] [2021-11-09 08:34:07,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243715753] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:07,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075688281] [2021-11-09 08:34:07,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:34:07,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:07,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:07,778 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:07,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 08:34:08,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:34:08,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:08,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:34:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:08,671 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:34:08,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-09 08:34:08,767 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:34:08,767 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:34:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:34:08,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075688281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:08,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:08,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 22 [2021-11-09 08:34:08,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135840748] [2021-11-09 08:34:08,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:34:08,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:08,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:34:08,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:34:08,798 INFO L87 Difference]: Start difference. First operand 132 states and 166 transitions. Second operand has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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 08:34:10,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:10,399 INFO L93 Difference]: Finished difference Result 329 states and 403 transitions. [2021-11-09 08:34:10,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-09 08:34:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 08:34:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:10,401 INFO L225 Difference]: With dead ends: 329 [2021-11-09 08:34:10,402 INFO L226 Difference]: Without dead ends: 327 [2021-11-09 08:34:10,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1893 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=813, Invalid=5193, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:34:10,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-09 08:34:10,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 156. [2021-11-09 08:34:10,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.2967741935483872) internal successors, (201), 155 states have internal predecessors, (201), 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 08:34:10,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2021-11-09 08:34:10,429 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 41 [2021-11-09 08:34:10,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:10,430 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2021-11-09 08:34:10,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 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 08:34:10,430 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2021-11-09 08:34:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:34:10,431 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:10,431 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:10,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:10,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:10,636 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:10,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:10,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1605031192, now seen corresponding path program 4 times [2021-11-09 08:34:10,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:10,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898775035] [2021-11-09 08:34:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:10,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:34:11,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:11,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898775035] [2021-11-09 08:34:11,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898775035] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:11,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192346165] [2021-11-09 08:34:11,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:34:11,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:11,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:11,234 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:11,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 08:34:11,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:34:11,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:34:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:11,840 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:34:11,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-09 08:34:12,053 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-11-09 08:34:12,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 42 [2021-11-09 08:34:12,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:34:12,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:34:12,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 08:34:12,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197005834] [2021-11-09 08:34:12,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:34:12,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:12,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:34:12,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:34:12,194 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:12,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:12,955 INFO L93 Difference]: Finished difference Result 181 states and 230 transitions. [2021-11-09 08:34:12,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 08:34:12,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 08:34:12,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:12,956 INFO L225 Difference]: With dead ends: 181 [2021-11-09 08:34:12,956 INFO L226 Difference]: Without dead ends: 179 [2021-11-09 08:34:12,957 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=256, Invalid=1550, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 08:34:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-09 08:34:12,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2021-11-09 08:34:12,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.3067484662576687) internal successors, (213), 163 states have internal predecessors, (213), 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 08:34:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 213 transitions. [2021-11-09 08:34:12,981 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 213 transitions. Word has length 41 [2021-11-09 08:34:12,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:12,981 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 213 transitions. [2021-11-09 08:34:12,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:12,982 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 213 transitions. [2021-11-09 08:34:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-09 08:34:12,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:12,993 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:13,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:13,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 08:34:13,200 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:13,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:13,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1758205096, now seen corresponding path program 5 times [2021-11-09 08:34:13,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:13,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492977246] [2021-11-09 08:34:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:13,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:34:13,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:13,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492977246] [2021-11-09 08:34:13,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492977246] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:13,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57643152] [2021-11-09 08:34:13,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:34:13,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:13,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:13,766 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:13,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 08:34:14,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 08:34:14,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:14,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:34:14,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:14,591 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-11-09 08:34:14,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2021-11-09 08:34:14,765 INFO L354 Elim1Store]: treesize reduction 56, result has 16.4 percent of original size [2021-11-09 08:34:14,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 30 [2021-11-09 08:34:14,928 INFO L354 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-11-09 08:34:14,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-11-09 08:34:15,053 INFO L354 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2021-11-09 08:34:15,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 51 [2021-11-09 08:34:15,157 INFO L354 Elim1Store]: treesize reduction 225, result has 13.8 percent of original size [2021-11-09 08:34:15,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 64 treesize of output 60 [2021-11-09 08:34:15,313 INFO L354 Elim1Store]: treesize reduction 75, result has 8.5 percent of original size [2021-11-09 08:34:15,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 40 [2021-11-09 08:34:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:34:15,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57643152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:15,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:15,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2021-11-09 08:34:15,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757944246] [2021-11-09 08:34:15,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:34:15,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:15,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:34:15,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:34:15,346 INFO L87 Difference]: Start difference. First operand 164 states and 213 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 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 08:34:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:18,001 INFO L93 Difference]: Finished difference Result 390 states and 505 transitions. [2021-11-09 08:34:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 08:34:18,004 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-09 08:34:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:18,005 INFO L225 Difference]: With dead ends: 390 [2021-11-09 08:34:18,005 INFO L226 Difference]: Without dead ends: 308 [2021-11-09 08:34:18,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2365 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=924, Invalid=7086, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 08:34:18,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-09 08:34:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 180. [2021-11-09 08:34:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2681564245810055) internal successors, (227), 179 states have internal predecessors, (227), 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 08:34:18,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 227 transitions. [2021-11-09 08:34:18,037 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 227 transitions. Word has length 41 [2021-11-09 08:34:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:18,038 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 227 transitions. [2021-11-09 08:34:18,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 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 08:34:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 227 transitions. [2021-11-09 08:34:18,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:34:18,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:18,039 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:18,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:18,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:18,245 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash -162895221, now seen corresponding path program 2 times [2021-11-09 08:34:18,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:18,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230701723] [2021-11-09 08:34:18,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:18,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:34:18,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:18,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230701723] [2021-11-09 08:34:18,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230701723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:18,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429000715] [2021-11-09 08:34:18,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:34:18,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:18,534 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:18,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 08:34:19,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:34:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:19,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:34:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:19,204 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 25 treesize of output 21 [2021-11-09 08:34:19,273 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 22 treesize of output 18 [2021-11-09 08:34:19,311 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 08:34:19,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-09 08:34:19,467 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-09 08:34:19,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 34 [2021-11-09 08:34:19,546 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:34:19,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-11-09 08:34:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:34:19,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429000715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:19,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:19,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 24 [2021-11-09 08:34:19,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844789257] [2021-11-09 08:34:19,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:34:19,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:19,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:34:19,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-11-09 08:34:19,574 INFO L87 Difference]: Start difference. First operand 180 states and 227 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 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 08:34:20,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:20,509 INFO L93 Difference]: Finished difference Result 309 states and 376 transitions. [2021-11-09 08:34:20,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 08:34:20,510 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 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 42 [2021-11-09 08:34:20,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:20,511 INFO L225 Difference]: With dead ends: 309 [2021-11-09 08:34:20,511 INFO L226 Difference]: Without dead ends: 307 [2021-11-09 08:34:20,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=327, Invalid=2535, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:34:20,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-09 08:34:20,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 204. [2021-11-09 08:34:20,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.2758620689655173) internal successors, (259), 203 states have internal predecessors, (259), 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 08:34:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 259 transitions. [2021-11-09 08:34:20,548 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 259 transitions. Word has length 42 [2021-11-09 08:34:20,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:20,548 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 259 transitions. [2021-11-09 08:34:20,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 24 states have internal predecessors, (61), 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 08:34:20,548 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 259 transitions. [2021-11-09 08:34:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 08:34:20,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:20,549 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:20,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:20,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:20,769 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:20,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:20,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1877035857, now seen corresponding path program 3 times [2021-11-09 08:34:20,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:20,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233577221] [2021-11-09 08:34:20,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:20,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:21,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:21,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233577221] [2021-11-09 08:34:21,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233577221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:21,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252535001] [2021-11-09 08:34:21,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:34:21,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:21,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:21,364 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:21,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 08:34:22,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 08:34:22,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:22,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 08:34:22,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:22,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:22,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-11-09 08:34:22,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:22,410 INFO L354 Elim1Store]: treesize reduction 92, result has 10.7 percent of original size [2021-11-09 08:34:22,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 38 [2021-11-09 08:34:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:22,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:22,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:22,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:34:22,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 33 [2021-11-09 08:34:22,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:34:22,718 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 1 case distinctions, treesize of input 46 treesize of output 30 [2021-11-09 08:34:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:34:22,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252535001] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:22,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:22,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 29 [2021-11-09 08:34:22,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000593741] [2021-11-09 08:34:22,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:34:22,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:22,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:34:22,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:34:22,746 INFO L87 Difference]: Start difference. First operand 204 states and 259 transitions. Second operand has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:23,879 INFO L93 Difference]: Finished difference Result 241 states and 298 transitions. [2021-11-09 08:34:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:34:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-09 08:34:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:23,881 INFO L225 Difference]: With dead ends: 241 [2021-11-09 08:34:23,881 INFO L226 Difference]: Without dead ends: 239 [2021-11-09 08:34:23,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=350, Invalid=2200, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:34:23,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-09 08:34:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2021-11-09 08:34:23,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.2766990291262137) internal successors, (263), 206 states have internal predecessors, (263), 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 08:34:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 263 transitions. [2021-11-09 08:34:23,911 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 263 transitions. Word has length 42 [2021-11-09 08:34:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:23,912 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 263 transitions. [2021-11-09 08:34:23,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 263 transitions. [2021-11-09 08:34:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 08:34:23,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:23,913 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:23,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-11-09 08:34:24,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 08:34:24,124 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:24,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2042002126, now seen corresponding path program 4 times [2021-11-09 08:34:24,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:24,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742355002] [2021-11-09 08:34:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:24,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:24,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:24,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:24,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742355002] [2021-11-09 08:34:24,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742355002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:24,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988180644] [2021-11-09 08:34:24,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:34:24,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:24,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:24,550 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:24,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 08:34:25,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:34:25,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:25,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:34:25,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:25,255 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 08:34:25,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 43 [2021-11-09 08:34:25,384 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-09 08:34:25,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 62 [2021-11-09 08:34:25,606 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:34:25,606 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:34:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:34:25,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988180644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:25,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:25,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-11-09 08:34:25,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219394504] [2021-11-09 08:34:25,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 08:34:25,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 08:34:25,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-11-09 08:34:25,628 INFO L87 Difference]: Start difference. First operand 207 states and 263 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:26,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:26,249 INFO L93 Difference]: Finished difference Result 260 states and 323 transitions. [2021-11-09 08:34:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:34:26,250 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 08:34:26,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:26,251 INFO L225 Difference]: With dead ends: 260 [2021-11-09 08:34:26,252 INFO L226 Difference]: Without dead ends: 258 [2021-11-09 08:34:26,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:34:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-09 08:34:26,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 221. [2021-11-09 08:34:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.2727272727272727) internal successors, (280), 220 states have internal predecessors, (280), 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 08:34:26,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 280 transitions. [2021-11-09 08:34:26,300 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 280 transitions. Word has length 43 [2021-11-09 08:34:26,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:26,301 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 280 transitions. [2021-11-09 08:34:26,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 280 transitions. [2021-11-09 08:34:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-09 08:34:26,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:26,303 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:26,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:26,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 08:34:26,517 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:26,518 INFO L85 PathProgramCache]: Analyzing trace with hash -19765869, now seen corresponding path program 6 times [2021-11-09 08:34:26,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:26,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810447619] [2021-11-09 08:34:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:26,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:27,150 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:34:27,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:27,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810447619] [2021-11-09 08:34:27,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810447619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:27,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754311783] [2021-11-09 08:34:27,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:34:27,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:27,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:27,154 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:27,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 08:34:28,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 08:34:28,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 08:34:28,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:28,421 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:34:28,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-09 08:34:28,628 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-11-09 08:34:28,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 42 [2021-11-09 08:34:28,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:34:28,766 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:34:28,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-09 08:34:28,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014456294] [2021-11-09 08:34:28,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:34:28,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:34:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:34:28,767 INFO L87 Difference]: Start difference. First operand 221 states and 280 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 08:34:30,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:30,252 INFO L93 Difference]: Finished difference Result 398 states and 495 transitions. [2021-11-09 08:34:30,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:34:30,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-09 08:34:30,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:30,254 INFO L225 Difference]: With dead ends: 398 [2021-11-09 08:34:30,254 INFO L226 Difference]: Without dead ends: 337 [2021-11-09 08:34:30,255 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=427, Invalid=3113, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 08:34:30,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-11-09 08:34:30,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 239. [2021-11-09 08:34:30,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.2857142857142858) internal successors, (306), 238 states have internal predecessors, (306), 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 08:34:30,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 306 transitions. [2021-11-09 08:34:30,297 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 306 transitions. Word has length 44 [2021-11-09 08:34:30,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:30,297 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 306 transitions. [2021-11-09 08:34:30,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 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 08:34:30,297 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 306 transitions. [2021-11-09 08:34:30,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 08:34:30,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:30,298 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:30,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:30,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 08:34:30,525 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:30,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1102094588, now seen corresponding path program 4 times [2021-11-09 08:34:30,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:30,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223491195] [2021-11-09 08:34:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:30,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:30,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:34:30,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:30,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223491195] [2021-11-09 08:34:30,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223491195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:30,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427822144] [2021-11-09 08:34:30,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:34:30,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:30,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:30,821 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:30,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 08:34:31,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:34:31,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:31,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:34:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:31,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:31,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2021-11-09 08:34:31,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:31,900 INFO L354 Elim1Store]: treesize reduction 74, result has 10.8 percent of original size [2021-11-09 08:34:31,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2021-11-09 08:34:32,157 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 08:34:32,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 37 [2021-11-09 08:34:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:34:32,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427822144] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:32,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:32,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-11-09 08:34:32,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525265284] [2021-11-09 08:34:32,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:34:32,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:32,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:34:32,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:34:32,188 INFO L87 Difference]: Start difference. First operand 239 states and 306 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 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 08:34:34,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:34,069 INFO L93 Difference]: Finished difference Result 384 states and 472 transitions. [2021-11-09 08:34:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 08:34:34,070 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 08:34:34,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:34,072 INFO L225 Difference]: With dead ends: 384 [2021-11-09 08:34:34,072 INFO L226 Difference]: Without dead ends: 335 [2021-11-09 08:34:34,074 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=764, Invalid=5242, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:34:34,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-09 08:34:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 241. [2021-11-09 08:34:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.2791666666666666) internal successors, (307), 240 states have internal predecessors, (307), 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 08:34:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 307 transitions. [2021-11-09 08:34:34,120 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 307 transitions. Word has length 45 [2021-11-09 08:34:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:34,120 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 307 transitions. [2021-11-09 08:34:34,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 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 08:34:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 307 transitions. [2021-11-09 08:34:34,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 08:34:34,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:34,121 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:34,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:34,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 08:34:34,322 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:34,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:34,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1482023711, now seen corresponding path program 5 times [2021-11-09 08:34:34,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:34,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304258560] [2021-11-09 08:34:34,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:34,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:34,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:34,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304258560] [2021-11-09 08:34:34,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304258560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:34,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366680811] [2021-11-09 08:34:34,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:34:34,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:34,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:34,786 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:34,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 08:34:35,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:34:35,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:34:35,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:36,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:36,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-11-09 08:34:36,190 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-11-09 08:34:36,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 47 [2021-11-09 08:34:36,392 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-09 08:34:36,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 39 [2021-11-09 08:34:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:34:36,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366680811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:36,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:36,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-11-09 08:34:36,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740766547] [2021-11-09 08:34:36,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:34:36,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:36,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:34:36,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:34:36,427 INFO L87 Difference]: Start difference. First operand 241 states and 307 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 08:34:37,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:37,105 INFO L93 Difference]: Finished difference Result 309 states and 381 transitions. [2021-11-09 08:34:37,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 08:34:37,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 46 [2021-11-09 08:34:37,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:37,107 INFO L225 Difference]: With dead ends: 309 [2021-11-09 08:34:37,107 INFO L226 Difference]: Without dead ends: 307 [2021-11-09 08:34:37,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:34:37,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-11-09 08:34:37,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 241. [2021-11-09 08:34:37,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.2791666666666666) internal successors, (307), 240 states have internal predecessors, (307), 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 08:34:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 307 transitions. [2021-11-09 08:34:37,158 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 307 transitions. Word has length 46 [2021-11-09 08:34:37,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:37,158 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 307 transitions. [2021-11-09 08:34:37,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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 08:34:37,159 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 307 transitions. [2021-11-09 08:34:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 08:34:37,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:37,160 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:37,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:37,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:37,385 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:37,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:37,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1749185528, now seen corresponding path program 5 times [2021-11-09 08:34:37,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:37,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255678188] [2021-11-09 08:34:37,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:37,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:37,565 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 08:34:37,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:37,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255678188] [2021-11-09 08:34:37,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255678188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:37,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404286807] [2021-11-09 08:34:37,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:34:37,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:37,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:37,570 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:37,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 08:34:38,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 08:34:38,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:38,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 08:34:38,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:34:39,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404286807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:39,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:39,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-11-09 08:34:39,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218809318] [2021-11-09 08:34:39,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 08:34:39,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:39,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 08:34:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-09 08:34:39,150 INFO L87 Difference]: Start difference. First operand 241 states and 307 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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 08:34:39,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:39,541 INFO L93 Difference]: Finished difference Result 598 states and 753 transitions. [2021-11-09 08:34:39,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:34:39,542 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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 47 [2021-11-09 08:34:39,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:39,544 INFO L225 Difference]: With dead ends: 598 [2021-11-09 08:34:39,544 INFO L226 Difference]: Without dead ends: 435 [2021-11-09 08:34:39,545 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:34:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-09 08:34:39,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 324. [2021-11-09 08:34:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.2198142414860682) internal successors, (394), 323 states have internal predecessors, (394), 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 08:34:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 394 transitions. [2021-11-09 08:34:39,601 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 394 transitions. Word has length 47 [2021-11-09 08:34:39,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:39,601 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 394 transitions. [2021-11-09 08:34:39,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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 08:34:39,602 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 394 transitions. [2021-11-09 08:34:39,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 08:34:39,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:39,603 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:39,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:39,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 08:34:39,803 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1783633389, now seen corresponding path program 3 times [2021-11-09 08:34:39,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:39,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982955848] [2021-11-09 08:34:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:39,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 7 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:41,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:41,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982955848] [2021-11-09 08:34:41,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982955848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:41,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402923745] [2021-11-09 08:34:41,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:34:41,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:41,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:41,033 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:34:41,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 08:34:41,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:34:41,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:34:41,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 08:34:41,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:34:42,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2021-11-09 08:34:42,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:42,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:42,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-11-09 08:34:42,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:42,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:42,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:34:42,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-09 08:34:42,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:42,350 INFO L354 Elim1Store]: treesize reduction 122, result has 18.7 percent of original size [2021-11-09 08:34:42,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 51 [2021-11-09 08:34:42,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:42,523 INFO L354 Elim1Store]: treesize reduction 302, result has 17.0 percent of original size [2021-11-09 08:34:42,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 67 treesize of output 88 [2021-11-09 08:34:42,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:34:42,902 INFO L354 Elim1Store]: treesize reduction 489, result has 18.1 percent of original size [2021-11-09 08:34:42,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 98 treesize of output 147 [2021-11-09 08:34:43,760 INFO L354 Elim1Store]: treesize reduction 205, result has 12.0 percent of original size [2021-11-09 08:34:43,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 62 treesize of output 54 [2021-11-09 08:34:43,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:34:43,953 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:34:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:34:43,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402923745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:43,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:34:43,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 39 [2021-11-09 08:34:43,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30031113] [2021-11-09 08:34:43,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 08:34:43,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:34:43,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 08:34:43,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:34:43,986 INFO L87 Difference]: Start difference. First operand 324 states and 394 transitions. Second operand has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:58,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:34:58,658 INFO L93 Difference]: Finished difference Result 636 states and 754 transitions. [2021-11-09 08:34:58,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-09 08:34:58,659 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-09 08:34:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:34:58,663 INFO L225 Difference]: With dead ends: 636 [2021-11-09 08:34:58,663 INFO L226 Difference]: Without dead ends: 512 [2021-11-09 08:34:58,666 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5054 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1724, Invalid=12796, Unknown=0, NotChecked=0, Total=14520 [2021-11-09 08:34:58,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-11-09 08:34:58,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 335. [2021-11-09 08:34:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.2095808383233533) internal successors, (404), 334 states have internal predecessors, (404), 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 08:34:58,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 404 transitions. [2021-11-09 08:34:58,751 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 404 transitions. Word has length 48 [2021-11-09 08:34:58,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:34:58,752 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 404 transitions. [2021-11-09 08:34:58,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9487179487179487) internal successors, (76), 39 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:34:58,752 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 404 transitions. [2021-11-09 08:34:58,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:34:58,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:34:58,754 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:34:58,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 08:34:58,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:58,986 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:34:58,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:34:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash -818040110, now seen corresponding path program 6 times [2021-11-09 08:34:58,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:34:58,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241617390] [2021-11-09 08:34:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:34:58,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:34:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:34:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 3 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:34:59,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:34:59,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241617390] [2021-11-09 08:34:59,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241617390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:34:59,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062766507] [2021-11-09 08:34:59,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:34:59,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:34:59,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:34:59,997 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:00,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 08:35:01,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:35:01,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:01,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 08:35:01,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:01,282 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 08:35:01,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:01,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:35:01,712 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-11-09 08:35:01,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 50 [2021-11-09 08:35:01,961 INFO L354 Elim1Store]: treesize reduction 246, result has 21.7 percent of original size [2021-11-09 08:35:01,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 97 [2021-11-09 08:35:02,592 INFO L354 Elim1Store]: treesize reduction 240, result has 10.4 percent of original size [2021-11-09 08:35:02,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 57 [2021-11-09 08:35:02,875 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-09 08:35:02,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 37 [2021-11-09 08:35:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:35:02,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062766507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:02,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:02,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 37 [2021-11-09 08:35:02,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876054654] [2021-11-09 08:35:02,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:35:02,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:35:02,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:35:02,919 INFO L87 Difference]: Start difference. First operand 335 states and 404 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:05,846 INFO L93 Difference]: Finished difference Result 445 states and 527 transitions. [2021-11-09 08:35:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-09 08:35:05,847 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 08:35:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:05,849 INFO L225 Difference]: With dead ends: 445 [2021-11-09 08:35:05,849 INFO L226 Difference]: Without dead ends: 413 [2021-11-09 08:35:05,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=701, Invalid=4849, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 08:35:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-11-09 08:35:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 373. [2021-11-09 08:35:05,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.206989247311828) internal successors, (449), 372 states have internal predecessors, (449), 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 08:35:05,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 449 transitions. [2021-11-09 08:35:05,929 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 449 transitions. Word has length 49 [2021-11-09 08:35:05,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:05,929 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 449 transitions. [2021-11-09 08:35:05,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:05,929 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 449 transitions. [2021-11-09 08:35:05,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:35:05,930 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:05,930 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:05,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:06,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:06,146 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:06,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1783487561, now seen corresponding path program 5 times [2021-11-09 08:35:06,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:06,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458907207] [2021-11-09 08:35:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:06,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 8 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:07,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:07,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458907207] [2021-11-09 08:35:07,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458907207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:07,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049796874] [2021-11-09 08:35:07,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:35:07,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:07,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:07,043 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:07,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 08:35:08,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 08:35:08,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:08,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 08:35:08,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:08,664 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:35:08,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:35:08,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:08,890 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:35:08,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:35:09,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:09,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-09 08:35:09,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:09,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-09 08:35:09,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,338 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:09,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 50 [2021-11-09 08:35:09,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:09,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:09,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 41 [2021-11-09 08:35:09,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:09,561 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:35:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:35:09,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049796874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:09,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:09,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 33 [2021-11-09 08:35:09,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651949246] [2021-11-09 08:35:09,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 08:35:09,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 08:35:09,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:35:09,598 INFO L87 Difference]: Start difference. First operand 373 states and 449 transitions. Second operand has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 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 08:35:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:11,619 INFO L93 Difference]: Finished difference Result 539 states and 644 transitions. [2021-11-09 08:35:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 08:35:11,619 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 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 49 [2021-11-09 08:35:11,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:11,622 INFO L225 Difference]: With dead ends: 539 [2021-11-09 08:35:11,622 INFO L226 Difference]: Without dead ends: 537 [2021-11-09 08:35:11,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=739, Invalid=3167, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 08:35:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-09 08:35:11,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 411. [2021-11-09 08:35:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.221951219512195) internal successors, (501), 410 states have internal predecessors, (501), 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 08:35:11,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 501 transitions. [2021-11-09 08:35:11,724 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 501 transitions. Word has length 49 [2021-11-09 08:35:11,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:11,724 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 501 transitions. [2021-11-09 08:35:11,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.393939393939394) internal successors, (79), 33 states have internal predecessors, (79), 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 08:35:11,725 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 501 transitions. [2021-11-09 08:35:11,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:35:11,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:11,727 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:11,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-09 08:35:11,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:11,937 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:11,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash -168081929, now seen corresponding path program 6 times [2021-11-09 08:35:11,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:11,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540092701] [2021-11-09 08:35:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:11,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:35:12,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:12,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540092701] [2021-11-09 08:35:12,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540092701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:12,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245745021] [2021-11-09 08:35:12,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:35:12,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:12,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:12,594 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:12,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 08:35:13,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:35:13,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:13,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:35:13,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:14,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:14,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-09 08:35:14,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:14,416 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:35:14,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-09 08:35:14,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:14,484 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:35:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:35:14,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245745021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:14,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:14,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 27 [2021-11-09 08:35:14,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79474782] [2021-11-09 08:35:14,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:35:14,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:35:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:35:14,514 INFO L87 Difference]: Start difference. First operand 411 states and 501 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 08:35:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:15,956 INFO L93 Difference]: Finished difference Result 526 states and 635 transitions. [2021-11-09 08:35:15,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 08:35:15,956 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 08:35:15,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:15,959 INFO L225 Difference]: With dead ends: 526 [2021-11-09 08:35:15,959 INFO L226 Difference]: Without dead ends: 524 [2021-11-09 08:35:15,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=393, Invalid=1959, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:35:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-09 08:35:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 453. [2021-11-09 08:35:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.2300884955752212) internal successors, (556), 452 states have internal predecessors, (556), 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 08:35:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 556 transitions. [2021-11-09 08:35:16,080 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 556 transitions. Word has length 49 [2021-11-09 08:35:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:16,080 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 556 transitions. [2021-11-09 08:35:16,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 08:35:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 556 transitions. [2021-11-09 08:35:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:35:16,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:16,083 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:16,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:16,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 08:35:16,298 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:16,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:16,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1467106005, now seen corresponding path program 7 times [2021-11-09 08:35:16,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:16,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861640377] [2021-11-09 08:35:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:16,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:16,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:17,193 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:17,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:17,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861640377] [2021-11-09 08:35:17,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861640377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:17,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794617393] [2021-11-09 08:35:17,194 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:35:17,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:17,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:17,195 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:17,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 08:35:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:35:18,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:18,806 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:35:18,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:35:19,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 53 [2021-11-09 08:35:19,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:19,068 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:35:19,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 115 [2021-11-09 08:35:19,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 60 [2021-11-09 08:35:19,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:19,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:19,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:19,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:19,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:19,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2021-11-09 08:35:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:19,381 INFO L354 Elim1Store]: treesize reduction 173, result has 14.4 percent of original size [2021-11-09 08:35:19,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 57 treesize of output 53 [2021-11-09 08:35:19,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:19,449 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:35:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:35:19,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794617393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:19,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:19,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 27 [2021-11-09 08:35:19,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438077618] [2021-11-09 08:35:19,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:35:19,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:35:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:35:19,482 INFO L87 Difference]: Start difference. First operand 453 states and 556 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 08:35:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:21,095 INFO L93 Difference]: Finished difference Result 620 states and 757 transitions. [2021-11-09 08:35:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-09 08:35:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 08:35:21,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:21,100 INFO L225 Difference]: With dead ends: 620 [2021-11-09 08:35:21,100 INFO L226 Difference]: Without dead ends: 618 [2021-11-09 08:35:21,100 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 12 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=307, Invalid=2143, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 08:35:21,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-11-09 08:35:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 459. [2021-11-09 08:35:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.2336244541484715) internal successors, (565), 458 states have internal predecessors, (565), 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 08:35:21,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 565 transitions. [2021-11-09 08:35:21,198 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 565 transitions. Word has length 49 [2021-11-09 08:35:21,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:21,199 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 565 transitions. [2021-11-09 08:35:21,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 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 08:35:21,199 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 565 transitions. [2021-11-09 08:35:21,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:35:21,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:21,201 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:21,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:21,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 08:35:21,418 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:21,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:21,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1718619919, now seen corresponding path program 8 times [2021-11-09 08:35:21,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:21,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176264313] [2021-11-09 08:35:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:21,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:22,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:22,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176264313] [2021-11-09 08:35:22,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176264313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:22,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949680765] [2021-11-09 08:35:22,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:35:22,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:22,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:22,422 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:22,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 08:35:23,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:35:23,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:23,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-09 08:35:23,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:23,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-11-09 08:35:23,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:23,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:23,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-11-09 08:35:24,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:24,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2021-11-09 08:35:24,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:24,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 49 [2021-11-09 08:35:24,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:24,368 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:35:24,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2021-11-09 08:35:24,454 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:24,455 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:35:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:35:24,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949680765] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:24,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:24,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 34 [2021-11-09 08:35:24,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14038765] [2021-11-09 08:35:24,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 08:35:24,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:24,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 08:35:24,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:35:24,492 INFO L87 Difference]: Start difference. First operand 459 states and 565 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 states have internal predecessors, (79), 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 08:35:26,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:26,662 INFO L93 Difference]: Finished difference Result 699 states and 853 transitions. [2021-11-09 08:35:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 08:35:26,663 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 states have internal predecessors, (79), 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 49 [2021-11-09 08:35:26,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:26,666 INFO L225 Difference]: With dead ends: 699 [2021-11-09 08:35:26,666 INFO L226 Difference]: Without dead ends: 579 [2021-11-09 08:35:26,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=592, Invalid=3568, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 08:35:26,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-09 08:35:26,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 444. [2021-11-09 08:35:26,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.2234762979683973) internal successors, (542), 443 states have internal predecessors, (542), 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 08:35:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 542 transitions. [2021-11-09 08:35:26,793 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 542 transitions. Word has length 49 [2021-11-09 08:35:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:26,793 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 542 transitions. [2021-11-09 08:35:26,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 states have internal predecessors, (79), 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 08:35:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 542 transitions. [2021-11-09 08:35:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 08:35:26,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:26,795 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:26,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:27,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:27,010 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:27,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:27,010 INFO L85 PathProgramCache]: Analyzing trace with hash -626385949, now seen corresponding path program 7 times [2021-11-09 08:35:27,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:27,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165436182] [2021-11-09 08:35:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:27,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:27,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:28,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:28,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165436182] [2021-11-09 08:35:28,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165436182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:28,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242577916] [2021-11-09 08:35:28,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:35:28,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:28,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:28,254 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:28,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 08:35:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 08:35:29,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:29,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:29,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-09 08:35:30,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,037 INFO L354 Elim1Store]: treesize reduction 66, result has 12.0 percent of original size [2021-11-09 08:35:30,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 38 [2021-11-09 08:35:30,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2021-11-09 08:35:30,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 31 [2021-11-09 08:35:30,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2021-11-09 08:35:30,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,566 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:35:30,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 111 [2021-11-09 08:35:30,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 62 [2021-11-09 08:35:30,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-09 08:35:30,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:30,905 INFO L354 Elim1Store]: treesize reduction 173, result has 14.4 percent of original size [2021-11-09 08:35:30,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 59 treesize of output 55 [2021-11-09 08:35:30,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:30,981 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 1 case distinctions, treesize of input 46 treesize of output 30 [2021-11-09 08:35:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:35:31,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242577916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:31,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:31,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 31 [2021-11-09 08:35:31,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867370590] [2021-11-09 08:35:31,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:35:31,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:31,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:35:31,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:35:31,032 INFO L87 Difference]: Start difference. First operand 444 states and 542 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:32,517 INFO L93 Difference]: Finished difference Result 612 states and 743 transitions. [2021-11-09 08:35:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:35:32,518 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-09 08:35:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:32,521 INFO L225 Difference]: With dead ends: 612 [2021-11-09 08:35:32,521 INFO L226 Difference]: Without dead ends: 610 [2021-11-09 08:35:32,522 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 19 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:35:32,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-11-09 08:35:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 453. [2021-11-09 08:35:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.2234513274336283) internal successors, (553), 452 states have internal predecessors, (553), 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 08:35:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 553 transitions. [2021-11-09 08:35:32,625 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 553 transitions. Word has length 49 [2021-11-09 08:35:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:32,625 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 553 transitions. [2021-11-09 08:35:32,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 553 transitions. [2021-11-09 08:35:32,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:35:32,627 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:32,627 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:32,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:32,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:32,842 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:32,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1629684262, now seen corresponding path program 7 times [2021-11-09 08:35:32,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:32,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983644321] [2021-11-09 08:35:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:32,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:33,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:33,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983644321] [2021-11-09 08:35:33,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983644321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:33,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384624836] [2021-11-09 08:35:33,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:35:33,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:33,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:33,565 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:33,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 08:35:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:34,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:35:34,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:35,086 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:35:35,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-09 08:35:35,330 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-11-09 08:35:35,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 38 [2021-11-09 08:35:35,468 INFO L354 Elim1Store]: treesize reduction 84, result has 20.8 percent of original size [2021-11-09 08:35:35,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2021-11-09 08:35:35,659 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 08:35:35,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-11-09 08:35:35,805 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:35:35,805 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 54 treesize of output 30 [2021-11-09 08:35:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:35:35,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384624836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:35,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:35,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18] total 32 [2021-11-09 08:35:35,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640638119] [2021-11-09 08:35:35,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:35:35,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:35,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:35:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:35:35,856 INFO L87 Difference]: Start difference. First operand 453 states and 553 transitions. Second operand has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:37,531 INFO L93 Difference]: Finished difference Result 647 states and 787 transitions. [2021-11-09 08:35:37,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 08:35:37,532 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-09 08:35:37,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:37,535 INFO L225 Difference]: With dead ends: 647 [2021-11-09 08:35:37,535 INFO L226 Difference]: Without dead ends: 645 [2021-11-09 08:35:37,536 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=402, Invalid=3258, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:35:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-11-09 08:35:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 489. [2021-11-09 08:35:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 1.2295081967213115) internal successors, (600), 488 states have internal predecessors, (600), 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 08:35:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 600 transitions. [2021-11-09 08:35:37,655 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 600 transitions. Word has length 50 [2021-11-09 08:35:37,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:37,655 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 600 transitions. [2021-11-09 08:35:37,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.4375) internal successors, (78), 32 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:35:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 600 transitions. [2021-11-09 08:35:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-09 08:35:37,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:37,658 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:37,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:37,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:37,873 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:37,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1922202222, now seen corresponding path program 4 times [2021-11-09 08:35:37,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:37,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135250194] [2021-11-09 08:35:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:37,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:35:38,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:38,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135250194] [2021-11-09 08:35:38,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135250194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:38,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092484160] [2021-11-09 08:35:38,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:35:38,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:38,426 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:38,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 08:35:39,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:35:39,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:39,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:35:39,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:40,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:40,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:35:40,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:40,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:40,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:40,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:40,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-09 08:35:40,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:40,487 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-09 08:35:40,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:35:40,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:40,673 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:35:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-09 08:35:40,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092484160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:40,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:40,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2021-11-09 08:35:40,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098637454] [2021-11-09 08:35:40,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 08:35:40,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:40,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 08:35:40,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:35:40,710 INFO L87 Difference]: Start difference. First operand 489 states and 600 transitions. Second operand has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 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 08:35:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:35:42,278 INFO L93 Difference]: Finished difference Result 732 states and 890 transitions. [2021-11-09 08:35:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:35:42,279 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 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 50 [2021-11-09 08:35:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:35:42,282 INFO L225 Difference]: With dead ends: 732 [2021-11-09 08:35:42,283 INFO L226 Difference]: Without dead ends: 730 [2021-11-09 08:35:42,283 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=509, Invalid=2797, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:35:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-11-09 08:35:42,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 525. [2021-11-09 08:35:42,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 1.2366412213740459) internal successors, (648), 524 states have internal predecessors, (648), 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 08:35:42,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 648 transitions. [2021-11-09 08:35:42,433 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 648 transitions. Word has length 50 [2021-11-09 08:35:42,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:35:42,433 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 648 transitions. [2021-11-09 08:35:42,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5142857142857142) internal successors, (88), 35 states have internal predecessors, (88), 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 08:35:42,434 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 648 transitions. [2021-11-09 08:35:42,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:35:42,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:35:42,436 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:35:42,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 08:35:42,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 08:35:42,639 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:35:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:35:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 508072344, now seen corresponding path program 5 times [2021-11-09 08:35:42,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:35:42,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024090761] [2021-11-09 08:35:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:35:42,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:35:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:35:43,980 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 7 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:35:43,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:35:43,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024090761] [2021-11-09 08:35:43,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024090761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:43,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270906189] [2021-11-09 08:35:43,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:35:43,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:35:43,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:35:43,982 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:35:43,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 08:35:45,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 08:35:45,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:35:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 08:35:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:35:46,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-11-09 08:35:46,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,213 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:46,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-11-09 08:35:46,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:35:46,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:46,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 54 [2021-11-09 08:35:46,447 INFO L354 Elim1Store]: treesize reduction 131, result has 15.5 percent of original size [2021-11-09 08:35:46,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 50 [2021-11-09 08:35:54,312 INFO L354 Elim1Store]: treesize reduction 183, result has 12.0 percent of original size [2021-11-09 08:35:54,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 54 [2021-11-09 08:35:54,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:35:54,566 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:35:54,610 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 08:35:54,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270906189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:35:54,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:35:54,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 43 [2021-11-09 08:35:54,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377285285] [2021-11-09 08:35:54,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 08:35:54,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:35:54,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 08:35:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1611, Unknown=3, NotChecked=0, Total=1806 [2021-11-09 08:35:54,612 INFO L87 Difference]: Start difference. First operand 525 states and 648 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 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 08:37:37,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:37,020 INFO L93 Difference]: Finished difference Result 1619 states and 1989 transitions. [2021-11-09 08:37:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2021-11-09 08:37:37,020 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 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) Word has length 51 [2021-11-09 08:37:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:37,026 INFO L225 Difference]: With dead ends: 1619 [2021-11-09 08:37:37,027 INFO L226 Difference]: Without dead ends: 1422 [2021-11-09 08:37:37,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14742 ImplicationChecksByTransitivity, 60.5s TimeCoverageRelationStatistics Valid=3048, Invalid=36732, Unknown=20, NotChecked=0, Total=39800 [2021-11-09 08:37:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-11-09 08:37:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 688. [2021-11-09 08:37:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 1.264919941775837) internal successors, (869), 687 states have internal predecessors, (869), 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 08:37:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 869 transitions. [2021-11-09 08:37:37,188 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 869 transitions. Word has length 51 [2021-11-09 08:37:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:37,188 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 869 transitions. [2021-11-09 08:37:37,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 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 08:37:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 869 transitions. [2021-11-09 08:37:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:37:37,190 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:37,190 INFO L513 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:37,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:37,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 08:37:37,398 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:37,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:37,398 INFO L85 PathProgramCache]: Analyzing trace with hash 421975120, now seen corresponding path program 6 times [2021-11-09 08:37:37,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:37,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651848365] [2021-11-09 08:37:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:37,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:38,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:38,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651848365] [2021-11-09 08:37:38,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651848365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:38,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937063584] [2021-11-09 08:37:38,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:37:38,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:38,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:38,724 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:38,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 08:37:40,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 08:37:40,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:40,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 08:37:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:40,630 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:37:40,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-09 08:37:40,871 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-11-09 08:37:40,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 38 [2021-11-09 08:37:40,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:37:40,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:37:40,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-09 08:37:40,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409520948] [2021-11-09 08:37:40,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:37:40,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:40,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:37:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:37:40,980 INFO L87 Difference]: Start difference. First operand 688 states and 869 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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 08:37:44,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:44,598 INFO L93 Difference]: Finished difference Result 784 states and 972 transitions. [2021-11-09 08:37:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 08:37:44,599 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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 51 [2021-11-09 08:37:44,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:44,603 INFO L225 Difference]: With dead ends: 784 [2021-11-09 08:37:44,603 INFO L226 Difference]: Without dead ends: 756 [2021-11-09 08:37:44,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=771, Invalid=5709, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 08:37:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2021-11-09 08:37:44,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 663. [2021-11-09 08:37:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.270392749244713) internal successors, (841), 662 states have internal predecessors, (841), 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 08:37:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 841 transitions. [2021-11-09 08:37:44,733 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 841 transitions. Word has length 51 [2021-11-09 08:37:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:44,734 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 841 transitions. [2021-11-09 08:37:44,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 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 08:37:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 841 transitions. [2021-11-09 08:37:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:37:44,735 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:44,736 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:44,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:44,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 08:37:44,950 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:44,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1406610301, now seen corresponding path program 6 times [2021-11-09 08:37:44,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:44,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423960163] [2021-11-09 08:37:44,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:44,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:45,642 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:37:45,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:45,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423960163] [2021-11-09 08:37:45,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423960163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:45,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720015475] [2021-11-09 08:37:45,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:37:45,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:45,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:45,644 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:45,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 08:37:47,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:37:47,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:47,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:37:47,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:47,782 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 08:37:47,943 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:37:47,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:37:48,076 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-09 08:37:48,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 31 [2021-11-09 08:37:48,267 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:37:48,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-11-09 08:37:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:37:48,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720015475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:48,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:37:48,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2021-11-09 08:37:48,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870705794] [2021-11-09 08:37:48,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 08:37:48,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:48,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 08:37:48,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:37:48,303 INFO L87 Difference]: Start difference. First operand 663 states and 841 transitions. Second operand has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:50,399 INFO L93 Difference]: Finished difference Result 767 states and 964 transitions. [2021-11-09 08:37:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:37:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-09 08:37:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:50,404 INFO L225 Difference]: With dead ends: 767 [2021-11-09 08:37:50,405 INFO L226 Difference]: Without dead ends: 765 [2021-11-09 08:37:50,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=449, Invalid=2973, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:37:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-11-09 08:37:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 687. [2021-11-09 08:37:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.271137026239067) internal successors, (872), 686 states have internal predecessors, (872), 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 08:37:50,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 872 transitions. [2021-11-09 08:37:50,563 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 872 transitions. Word has length 51 [2021-11-09 08:37:50,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:50,564 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 872 transitions. [2021-11-09 08:37:50,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:37:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 872 transitions. [2021-11-09 08:37:50,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:37:50,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:50,566 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:50,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:50,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:50,782 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:50,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1705726841, now seen corresponding path program 8 times [2021-11-09 08:37:50,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:50,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200926632] [2021-11-09 08:37:50,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:50,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:37:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:37:52,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:37:52,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200926632] [2021-11-09 08:37:52,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200926632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:37:52,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759635328] [2021-11-09 08:37:52,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:37:52,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:52,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:37:52,127 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:37:52,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 08:37:53,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:37:53,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:37:53,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 08:37:53,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:37:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:37:54,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-11-09 08:37:54,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:37:54,324 INFO L354 Elim1Store]: treesize reduction 92, result has 10.7 percent of original size [2021-11-09 08:37:54,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 38 [2021-11-09 08:37:54,458 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:37:54,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:37:54,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-09 08:37:54,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386032471] [2021-11-09 08:37:54,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:37:54,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:37:54,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:37:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 08:37:54,460 INFO L87 Difference]: Start difference. First operand 687 states and 872 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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 08:37:59,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:37:59,447 INFO L93 Difference]: Finished difference Result 772 states and 963 transitions. [2021-11-09 08:37:59,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 08:37:59,448 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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 52 [2021-11-09 08:37:59,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:37:59,452 INFO L225 Difference]: With dead ends: 772 [2021-11-09 08:37:59,452 INFO L226 Difference]: Without dead ends: 727 [2021-11-09 08:37:59,453 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=906, Invalid=5414, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 08:37:59,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-11-09 08:37:59,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 675. [2021-11-09 08:37:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 1.2729970326409497) internal successors, (858), 674 states have internal predecessors, (858), 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 08:37:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 858 transitions. [2021-11-09 08:37:59,604 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 858 transitions. Word has length 52 [2021-11-09 08:37:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:37:59,605 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 858 transitions. [2021-11-09 08:37:59,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 states have internal predecessors, (52), 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 08:37:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 858 transitions. [2021-11-09 08:37:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:37:59,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:37:59,606 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:37:59,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 08:37:59,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:37:59,807 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:37:59,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:37:59,808 INFO L85 PathProgramCache]: Analyzing trace with hash 756057700, now seen corresponding path program 9 times [2021-11-09 08:37:59,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:37:59,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437857197] [2021-11-09 08:37:59,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:37:59,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:37:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 86 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:38:00,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:00,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437857197] [2021-11-09 08:38:00,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437857197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:00,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643945348] [2021-11-09 08:38:00,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:38:00,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:00,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:00,306 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:00,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 08:38:02,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 08:38:02,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 08:38:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:02,533 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:38:02,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-09 08:38:02,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:02,638 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:38:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 18 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:38:02,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643945348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:02,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:02,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 21 [2021-11-09 08:38:02,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867370728] [2021-11-09 08:38:02,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:38:02,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:02,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:38:02,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:38:02,665 INFO L87 Difference]: Start difference. First operand 675 states and 858 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:04,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:04,651 INFO L93 Difference]: Finished difference Result 998 states and 1256 transitions. [2021-11-09 08:38:04,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-09 08:38:04,652 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 08:38:04,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:04,657 INFO L225 Difference]: With dead ends: 998 [2021-11-09 08:38:04,657 INFO L226 Difference]: Without dead ends: 996 [2021-11-09 08:38:04,658 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1991 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1278, Invalid=4728, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:38:04,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-11-09 08:38:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 760. [2021-11-09 08:38:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 759 states have (on average 1.2924901185770752) internal successors, (981), 759 states have internal predecessors, (981), 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 08:38:04,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 981 transitions. [2021-11-09 08:38:04,836 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 981 transitions. Word has length 52 [2021-11-09 08:38:04,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:04,836 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 981 transitions. [2021-11-09 08:38:04,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:04,837 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 981 transitions. [2021-11-09 08:38:04,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:38:04,838 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:04,839 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:04,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:05,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-09 08:38:05,041 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:05,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1334688660, now seen corresponding path program 8 times [2021-11-09 08:38:05,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:05,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287297353] [2021-11-09 08:38:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:05,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:05,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:05,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287297353] [2021-11-09 08:38:05,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287297353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:05,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365870548] [2021-11-09 08:38:05,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:38:05,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:05,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:05,939 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:05,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 08:38:07,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:38:07,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:07,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:38:07,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:08,357 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:38:08,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2021-11-09 08:38:08,659 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-11-09 08:38:08,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 42 [2021-11-09 08:38:08,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:38:08,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:38:08,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 08:38:08,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79445289] [2021-11-09 08:38:08,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:38:08,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:08,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:38:08,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:38:08,823 INFO L87 Difference]: Start difference. First operand 760 states and 981 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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 08:38:10,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:10,612 INFO L93 Difference]: Finished difference Result 947 states and 1181 transitions. [2021-11-09 08:38:10,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:38:10,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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 52 [2021-11-09 08:38:10,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:10,618 INFO L225 Difference]: With dead ends: 947 [2021-11-09 08:38:10,618 INFO L226 Difference]: Without dead ends: 945 [2021-11-09 08:38:10,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=372, Invalid=2934, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 08:38:10,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-11-09 08:38:10,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 769. [2021-11-09 08:38:10,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 1.29296875) internal successors, (993), 768 states have internal predecessors, (993), 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 08:38:10,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 993 transitions. [2021-11-09 08:38:10,768 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 993 transitions. Word has length 52 [2021-11-09 08:38:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:10,768 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 993 transitions. [2021-11-09 08:38:10,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 21 states have internal predecessors, (52), 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 08:38:10,768 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 993 transitions. [2021-11-09 08:38:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:38:10,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:10,770 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:10,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:10,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:10,971 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:10,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1374222224, now seen corresponding path program 10 times [2021-11-09 08:38:10,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:10,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010105507] [2021-11-09 08:38:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:10,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:12,398 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:12,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:12,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010105507] [2021-11-09 08:38:12,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010105507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:12,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394106047] [2021-11-09 08:38:12,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:38:12,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:12,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:12,401 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:12,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 08:38:14,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:38:14,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:14,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 08:38:14,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:14,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:14,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-11-09 08:38:14,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:14,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:14,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:14,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:14,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 42 [2021-11-09 08:38:14,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 56 [2021-11-09 08:38:14,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:14,993 INFO L354 Elim1Store]: treesize reduction 67, result has 23.0 percent of original size [2021-11-09 08:38:14,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 124 treesize of output 124 [2021-11-09 08:38:15,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 63 [2021-11-09 08:38:15,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 47 [2021-11-09 08:38:15,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:15,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:15,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 61 [2021-11-09 08:38:15,433 INFO L354 Elim1Store]: treesize reduction 195, result has 13.7 percent of original size [2021-11-09 08:38:15,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 59 treesize of output 55 [2021-11-09 08:38:15,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:15,561 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:38:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:38:15,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394106047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:15,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:15,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 29 [2021-11-09 08:38:15,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067015045] [2021-11-09 08:38:15,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 08:38:15,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:15,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 08:38:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-11-09 08:38:15,597 INFO L87 Difference]: Start difference. First operand 769 states and 993 transitions. Second operand has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:17,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:17,860 INFO L93 Difference]: Finished difference Result 960 states and 1205 transitions. [2021-11-09 08:38:17,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:38:17,860 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 08:38:17,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:17,867 INFO L225 Difference]: With dead ends: 960 [2021-11-09 08:38:17,867 INFO L226 Difference]: Without dead ends: 958 [2021-11-09 08:38:17,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 18 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=319, Invalid=2437, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 08:38:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-11-09 08:38:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 772. [2021-11-09 08:38:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.2944228274967575) internal successors, (998), 771 states have internal predecessors, (998), 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 08:38:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 998 transitions. [2021-11-09 08:38:18,020 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 998 transitions. Word has length 52 [2021-11-09 08:38:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:18,021 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 998 transitions. [2021-11-09 08:38:18,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.413793103448276) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 998 transitions. [2021-11-09 08:38:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:38:18,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:18,023 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:18,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:18,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:18,230 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:18,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:18,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1191854174, now seen corresponding path program 9 times [2021-11-09 08:38:18,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:18,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336489163] [2021-11-09 08:38:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:18,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 5 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:38:19,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:19,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336489163] [2021-11-09 08:38:19,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336489163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:19,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2724048] [2021-11-09 08:38:19,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:38:19,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:19,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:19,309 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:19,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 08:38:21,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 08:38:21,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:21,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:38:21,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:21,444 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 08:38:21,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-09 08:38:21,662 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-11-09 08:38:21,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 39 [2021-11-09 08:38:21,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:38:21,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:38:21,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-11-09 08:38:21,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410982185] [2021-11-09 08:38:21,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 08:38:21,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:21,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 08:38:21,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 08:38:21,780 INFO L87 Difference]: Start difference. First operand 772 states and 998 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:23,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:23,771 INFO L93 Difference]: Finished difference Result 886 states and 1135 transitions. [2021-11-09 08:38:23,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:38:23,772 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-09 08:38:23,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:23,776 INFO L225 Difference]: With dead ends: 886 [2021-11-09 08:38:23,776 INFO L226 Difference]: Without dead ends: 884 [2021-11-09 08:38:23,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=542, Invalid=2880, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 08:38:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-11-09 08:38:23,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 772. [2021-11-09 08:38:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 772 states, 771 states have (on average 1.2944228274967575) internal successors, (998), 771 states have internal predecessors, (998), 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 08:38:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 772 states to 772 states and 998 transitions. [2021-11-09 08:38:23,957 INFO L78 Accepts]: Start accepts. Automaton has 772 states and 998 transitions. Word has length 52 [2021-11-09 08:38:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:23,958 INFO L470 AbstractCegarLoop]: Abstraction has 772 states and 998 transitions. [2021-11-09 08:38:23,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 24 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 772 states and 998 transitions. [2021-11-09 08:38:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:38:23,959 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:23,959 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:23,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-09 08:38:24,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 08:38:24,160 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:24,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:24,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1443368088, now seen corresponding path program 10 times [2021-11-09 08:38:24,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:24,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121309431] [2021-11-09 08:38:24,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:24,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:25,217 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 2 proven. 99 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:38:25,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:25,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121309431] [2021-11-09 08:38:25,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121309431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:25,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736221896] [2021-11-09 08:38:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:38:25,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:25,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:25,219 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:25,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 08:38:27,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:38:27,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 08:38:27,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:27,382 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:38:27,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-09 08:38:27,729 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-11-09 08:38:27,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 42 [2021-11-09 08:38:27,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:27,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:27,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:27,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:27,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:27,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:27,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2021-11-09 08:38:28,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:28,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:28,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:28,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:28,083 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:28,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 51 [2021-11-09 08:38:28,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:28,220 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:38:28,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:38:28,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:28,303 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 1 case distinctions, treesize of input 46 treesize of output 30 [2021-11-09 08:38:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 7 proven. 77 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-09 08:38:28,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736221896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:28,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:28,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21] total 36 [2021-11-09 08:38:28,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897740266] [2021-11-09 08:38:28,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 08:38:28,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:28,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 08:38:28,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1100, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:38:28,344 INFO L87 Difference]: Start difference. First operand 772 states and 998 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 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 08:38:30,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:30,531 INFO L93 Difference]: Finished difference Result 944 states and 1211 transitions. [2021-11-09 08:38:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 08:38:30,531 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 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 52 [2021-11-09 08:38:30,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:30,538 INFO L225 Difference]: With dead ends: 944 [2021-11-09 08:38:30,539 INFO L226 Difference]: Without dead ends: 942 [2021-11-09 08:38:30,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=503, Invalid=4053, Unknown=0, NotChecked=0, Total=4556 [2021-11-09 08:38:30,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-11-09 08:38:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 775. [2021-11-09 08:38:30,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 1.2945736434108528) internal successors, (1002), 774 states have internal predecessors, (1002), 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 08:38:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1002 transitions. [2021-11-09 08:38:30,791 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1002 transitions. Word has length 52 [2021-11-09 08:38:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:30,791 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1002 transitions. [2021-11-09 08:38:30,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 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 08:38:30,792 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1002 transitions. [2021-11-09 08:38:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:38:30,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:30,794 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:30,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:31,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 08:38:31,010 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash 562663096, now seen corresponding path program 11 times [2021-11-09 08:38:31,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:31,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088075056] [2021-11-09 08:38:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:31,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:38:32,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:32,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088075056] [2021-11-09 08:38:32,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088075056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:32,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026662627] [2021-11-09 08:38:32,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:38:32,315 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:32,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:32,316 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:32,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 08:38:34,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 08:38:34,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:34,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 08:38:34,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:34,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:34,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-11-09 08:38:35,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:35,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 30 [2021-11-09 08:38:35,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:35,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-09 08:38:35,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,448 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:38:35,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-11-09 08:38:35,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 62 [2021-11-09 08:38:35,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-09 08:38:35,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,708 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:35,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 61 [2021-11-09 08:38:35,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:35,882 INFO L354 Elim1Store]: treesize reduction 173, result has 14.4 percent of original size [2021-11-09 08:38:35,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 59 treesize of output 55 [2021-11-09 08:38:35,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:35,964 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 1 case distinctions, treesize of input 46 treesize of output 30 [2021-11-09 08:38:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 5 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:38:36,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026662627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:36,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:36,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 37 [2021-11-09 08:38:36,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851545764] [2021-11-09 08:38:36,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:38:36,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:36,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:38:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:38:36,006 INFO L87 Difference]: Start difference. First operand 775 states and 1002 transitions. Second operand has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 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 08:38:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:41,836 INFO L93 Difference]: Finished difference Result 1882 states and 2399 transitions. [2021-11-09 08:38:41,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-09 08:38:41,837 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 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 52 [2021-11-09 08:38:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:41,844 INFO L225 Difference]: With dead ends: 1882 [2021-11-09 08:38:41,844 INFO L226 Difference]: Without dead ends: 1552 [2021-11-09 08:38:41,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4326 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1026, Invalid=11184, Unknown=0, NotChecked=0, Total=12210 [2021-11-09 08:38:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-11-09 08:38:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1034. [2021-11-09 08:38:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 1.3068731848983544) internal successors, (1350), 1033 states have internal predecessors, (1350), 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 08:38:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1350 transitions. [2021-11-09 08:38:42,050 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1350 transitions. Word has length 52 [2021-11-09 08:38:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:42,051 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 1350 transitions. [2021-11-09 08:38:42,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 37 states have internal predecessors, (84), 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 08:38:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1350 transitions. [2021-11-09 08:38:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:38:42,052 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:42,052 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:42,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:42,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-09 08:38:42,253 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:42,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1828282381, now seen corresponding path program 9 times [2021-11-09 08:38:42,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:42,255 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404585736] [2021-11-09 08:38:42,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:42,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:42,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:38:42,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:42,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404585736] [2021-11-09 08:38:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404585736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:42,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313095331] [2021-11-09 08:38:42,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:38:42,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:42,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:42,862 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:42,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 08:38:45,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 08:38:45,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:45,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 08:38:45,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:45,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-11-09 08:38:45,766 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 08:38:45,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2021-11-09 08:38:45,869 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:38:45,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-11-09 08:38:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:38:45,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313095331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:45,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:45,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 22 [2021-11-09 08:38:45,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931823941] [2021-11-09 08:38:45,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:38:45,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:45,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:38:45,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:38:45,902 INFO L87 Difference]: Start difference. First operand 1034 states and 1350 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:48,100 INFO L93 Difference]: Finished difference Result 1363 states and 1735 transitions. [2021-11-09 08:38:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-09 08:38:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-09 08:38:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:48,107 INFO L225 Difference]: With dead ends: 1363 [2021-11-09 08:38:48,107 INFO L226 Difference]: Without dead ends: 1361 [2021-11-09 08:38:48,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2004 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=512, Invalid=5650, Unknown=0, NotChecked=0, Total=6162 [2021-11-09 08:38:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2021-11-09 08:38:48,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1059. [2021-11-09 08:38:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 1.3081285444234405) internal successors, (1384), 1058 states have internal predecessors, (1384), 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 08:38:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 1384 transitions. [2021-11-09 08:38:48,318 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 1384 transitions. Word has length 53 [2021-11-09 08:38:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:48,318 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 1384 transitions. [2021-11-09 08:38:48,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 22 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:38:48,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 1384 transitions. [2021-11-09 08:38:48,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 08:38:48,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:48,320 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:48,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:48,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 08:38:48,521 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:48,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1667719757, now seen corresponding path program 10 times [2021-11-09 08:38:48,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:48,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398788513] [2021-11-09 08:38:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:48,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:38:49,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:49,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398788513] [2021-11-09 08:38:49,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398788513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:49,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438805980] [2021-11-09 08:38:49,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:38:49,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:49,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:49,056 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:49,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 08:38:51,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:38:51,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:38:51,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 08:38:51,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:51,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:51,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-11-09 08:38:51,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:51,663 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:51,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2021-11-09 08:38:51,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:51,849 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-09 08:38:51,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:38:52,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:38:52,049 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:38:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:38:52,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438805980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:52,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:38:52,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-11-09 08:38:52,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080132152] [2021-11-09 08:38:52,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 08:38:52,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:52,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 08:38:52,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:38:52,086 INFO L87 Difference]: Start difference. First operand 1059 states and 1384 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 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 08:38:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:38:53,801 INFO L93 Difference]: Finished difference Result 1214 states and 1571 transitions. [2021-11-09 08:38:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:38:53,802 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 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) Word has length 53 [2021-11-09 08:38:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:38:53,808 INFO L225 Difference]: With dead ends: 1214 [2021-11-09 08:38:53,808 INFO L226 Difference]: Without dead ends: 1212 [2021-11-09 08:38:53,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=471, Invalid=2721, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 08:38:53,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-11-09 08:38:54,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1057. [2021-11-09 08:38:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 1.3096590909090908) internal successors, (1383), 1056 states have internal predecessors, (1383), 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 08:38:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1383 transitions. [2021-11-09 08:38:54,025 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1383 transitions. Word has length 53 [2021-11-09 08:38:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:38:54,026 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1383 transitions. [2021-11-09 08:38:54,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 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 08:38:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1383 transitions. [2021-11-09 08:38:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 08:38:54,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:38:54,028 INFO L513 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:38:54,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 08:38:54,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 08:38:54,228 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:38:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:38:54,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1630142667, now seen corresponding path program 7 times [2021-11-09 08:38:54,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:38:54,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293049861] [2021-11-09 08:38:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:38:54,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:38:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:55,602 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 7 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:38:55,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:38:55,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293049861] [2021-11-09 08:38:55,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293049861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:38:55,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275234866] [2021-11-09 08:38:55,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:38:55,603 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:38:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:38:55,604 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:38:55,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 08:38:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:38:57,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 08:38:57,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:38:58,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:58,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-11-09 08:38:58,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:38:58,511 INFO L354 Elim1Store]: treesize reduction 95, result has 11.2 percent of original size [2021-11-09 08:38:58,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 39 [2021-11-09 08:38:58,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:38:58,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:38:58,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-11-09 08:38:58,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822647931] [2021-11-09 08:38:58,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 08:38:58,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:38:58,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 08:38:58,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1059, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 08:38:58,687 INFO L87 Difference]: Start difference. First operand 1057 states and 1383 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:02,132 INFO L93 Difference]: Finished difference Result 1138 states and 1466 transitions. [2021-11-09 08:39:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-09 08:39:02,133 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 08:39:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:02,139 INFO L225 Difference]: With dead ends: 1138 [2021-11-09 08:39:02,139 INFO L226 Difference]: Without dead ends: 1136 [2021-11-09 08:39:02,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1960 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=921, Invalid=5085, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 08:39:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2021-11-09 08:39:02,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1047. [2021-11-09 08:39:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 1.311663479923518) internal successors, (1372), 1046 states have internal predecessors, (1372), 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 08:39:02,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1372 transitions. [2021-11-09 08:39:02,360 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1372 transitions. Word has length 54 [2021-11-09 08:39:02,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:02,360 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 1372 transitions. [2021-11-09 08:39:02,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:02,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1372 transitions. [2021-11-09 08:39:02,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 08:39:02,362 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:02,362 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:02,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:02,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:02,566 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:02,566 INFO L85 PathProgramCache]: Analyzing trace with hash -445038608, now seen corresponding path program 11 times [2021-11-09 08:39:02,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:02,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089455168] [2021-11-09 08:39:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:02,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:03,150 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:39:03,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:03,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089455168] [2021-11-09 08:39:03,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089455168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:03,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338385386] [2021-11-09 08:39:03,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:39:03,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:03,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:03,152 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:03,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 08:39:05,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 08:39:05,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:39:05,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:05,973 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:39:05,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-09 08:39:06,252 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 08:39:06,253 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 64 treesize of output 36 [2021-11-09 08:39:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:39:06,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338385386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:06,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:06,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 19 [2021-11-09 08:39:06,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127124882] [2021-11-09 08:39:06,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 08:39:06,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:06,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 08:39:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:39:06,295 INFO L87 Difference]: Start difference. First operand 1047 states and 1372 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:08,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:08,204 INFO L93 Difference]: Finished difference Result 1282 states and 1645 transitions. [2021-11-09 08:39:08,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-09 08:39:08,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-09 08:39:08,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:08,211 INFO L225 Difference]: With dead ends: 1282 [2021-11-09 08:39:08,211 INFO L226 Difference]: Without dead ends: 1280 [2021-11-09 08:39:08,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=374, Invalid=2488, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:39:08,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-11-09 08:39:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1079. [2021-11-09 08:39:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 1078 states have (on average 1.310760667903525) internal successors, (1413), 1078 states have internal predecessors, (1413), 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 08:39:08,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1413 transitions. [2021-11-09 08:39:08,434 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1413 transitions. Word has length 54 [2021-11-09 08:39:08,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:08,434 INFO L470 AbstractCegarLoop]: Abstraction has 1079 states and 1413 transitions. [2021-11-09 08:39:08,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:39:08,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1413 transitions. [2021-11-09 08:39:08,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 08:39:08,437 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:08,437 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:08,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:08,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-09 08:39:08,650 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:08,651 INFO L85 PathProgramCache]: Analyzing trace with hash 59133366, now seen corresponding path program 12 times [2021-11-09 08:39:08,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:08,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891897721] [2021-11-09 08:39:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:08,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:39:09,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:09,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891897721] [2021-11-09 08:39:09,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891897721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:09,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762457883] [2021-11-09 08:39:09,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:39:09,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:09,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:09,338 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:09,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 08:39:12,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-09 08:39:12,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:39:12,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:12,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:12,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2021-11-09 08:39:12,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:12,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:39:12,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 27 [2021-11-09 08:39:12,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:12,731 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:39:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:39:12,955 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-09 08:39:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 39 [2021-11-09 08:39:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:39:12,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762457883] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:12,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:12,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 23 [2021-11-09 08:39:12,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095860920] [2021-11-09 08:39:12,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 08:39:12,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:12,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 08:39:12,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-11-09 08:39:12,985 INFO L87 Difference]: Start difference. First operand 1079 states and 1413 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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 08:39:14,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:14,634 INFO L93 Difference]: Finished difference Result 1187 states and 1538 transitions. [2021-11-09 08:39:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 08:39:14,635 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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) Word has length 54 [2021-11-09 08:39:14,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:14,640 INFO L225 Difference]: With dead ends: 1187 [2021-11-09 08:39:14,641 INFO L226 Difference]: Without dead ends: 1185 [2021-11-09 08:39:14,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=322, Invalid=1570, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:39:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-11-09 08:39:14,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1088. [2021-11-09 08:39:14,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 1.311867525298988) internal successors, (1426), 1087 states have internal predecessors, (1426), 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 08:39:14,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1426 transitions. [2021-11-09 08:39:14,867 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1426 transitions. Word has length 54 [2021-11-09 08:39:14,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:14,868 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1426 transitions. [2021-11-09 08:39:14,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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 08:39:14,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1426 transitions. [2021-11-09 08:39:14,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:39:14,869 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:14,869 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:14,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:15,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:15,070 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:15,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:15,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1281285196, now seen corresponding path program 8 times [2021-11-09 08:39:15,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:15,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189956613] [2021-11-09 08:39:15,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:15,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:15,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 2 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:16,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:16,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189956613] [2021-11-09 08:39:16,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189956613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:16,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337501362] [2021-11-09 08:39:16,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:39:16,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:16,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:16,889 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:16,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 08:39:19,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:39:19,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 08:39:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:19,366 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:39:19,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:39:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:19,581 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-09 08:39:19,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 43 [2021-11-09 08:39:19,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:19,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:19,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:19,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:19,918 INFO L354 Elim1Store]: treesize reduction 259, result has 10.1 percent of original size [2021-11-09 08:39:19,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 55 [2021-11-09 08:39:20,329 INFO L354 Elim1Store]: treesize reduction 157, result has 22.3 percent of original size [2021-11-09 08:39:20,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 74 [2021-11-09 08:39:20,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 52 [2021-11-09 08:39:20,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:20,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:20,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:20,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:20,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 39 [2021-11-09 08:39:20,724 INFO L354 Elim1Store]: treesize reduction 131, result has 15.5 percent of original size [2021-11-09 08:39:20,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 61 [2021-11-09 08:39:20,987 INFO L354 Elim1Store]: treesize reduction 162, result has 22.1 percent of original size [2021-11-09 08:39:20,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 83 [2021-11-09 08:39:21,328 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-09 08:39:21,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 37 [2021-11-09 08:39:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:39:21,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337501362] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:21,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:21,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27] total 44 [2021-11-09 08:39:21,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438739697] [2021-11-09 08:39:21,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 08:39:21,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 08:39:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1661, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 08:39:21,378 INFO L87 Difference]: Start difference. First operand 1088 states and 1426 transitions. Second operand has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 44 states have internal predecessors, (84), 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 08:39:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:26,199 INFO L93 Difference]: Finished difference Result 1639 states and 2122 transitions. [2021-11-09 08:39:26,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-09 08:39:26,200 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 44 states have internal predecessors, (84), 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 55 [2021-11-09 08:39:26,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:26,207 INFO L225 Difference]: With dead ends: 1639 [2021-11-09 08:39:26,208 INFO L226 Difference]: Without dead ends: 1205 [2021-11-09 08:39:26,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=812, Invalid=7930, Unknown=0, NotChecked=0, Total=8742 [2021-11-09 08:39:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2021-11-09 08:39:26,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1103. [2021-11-09 08:39:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1103 states, 1102 states have (on average 1.309437386569873) internal successors, (1443), 1102 states have internal predecessors, (1443), 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 08:39:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1443 transitions. [2021-11-09 08:39:26,457 INFO L78 Accepts]: Start accepts. Automaton has 1103 states and 1443 transitions. Word has length 55 [2021-11-09 08:39:26,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:26,457 INFO L470 AbstractCegarLoop]: Abstraction has 1103 states and 1443 transitions. [2021-11-09 08:39:26,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 44 states have internal predecessors, (84), 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 08:39:26,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1103 states and 1443 transitions. [2021-11-09 08:39:26,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:39:26,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:26,459 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:26,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-09 08:39:26,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:26,659 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:26,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:26,660 INFO L85 PathProgramCache]: Analyzing trace with hash 332581593, now seen corresponding path program 7 times [2021-11-09 08:39:26,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:26,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331461687] [2021-11-09 08:39:26,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:26,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:27,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:27,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331461687] [2021-11-09 08:39:27,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331461687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:27,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195775582] [2021-11-09 08:39:27,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:39:27,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:27,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:27,289 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:27,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 08:39:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:29,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 08:39:29,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:29,890 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 08:39:30,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 08:39:30,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:30,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:30,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-11-09 08:39:30,301 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 08:39:30,301 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 64 treesize of output 36 [2021-11-09 08:39:30,330 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:39:30,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195775582] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:30,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:30,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 20 [2021-11-09 08:39:30,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921735978] [2021-11-09 08:39:30,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:39:30,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:30,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:39:30,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:39:30,331 INFO L87 Difference]: Start difference. First operand 1103 states and 1443 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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 08:39:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:31,682 INFO L93 Difference]: Finished difference Result 1253 states and 1614 transitions. [2021-11-09 08:39:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:39:31,683 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-09 08:39:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:31,689 INFO L225 Difference]: With dead ends: 1253 [2021-11-09 08:39:31,689 INFO L226 Difference]: Without dead ends: 1251 [2021-11-09 08:39:31,690 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 48 SyntacticMatches, 11 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=1243, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 08:39:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-11-09 08:39:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1146. [2021-11-09 08:39:31,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1146 states, 1145 states have (on average 1.3074235807860262) internal successors, (1497), 1145 states have internal predecessors, (1497), 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 08:39:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1497 transitions. [2021-11-09 08:39:31,980 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1497 transitions. Word has length 55 [2021-11-09 08:39:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:31,980 INFO L470 AbstractCegarLoop]: Abstraction has 1146 states and 1497 transitions. [2021-11-09 08:39:31,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 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 08:39:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1497 transitions. [2021-11-09 08:39:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:39:31,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:31,982 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:32,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:32,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-09 08:39:32,182 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:32,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:32,183 INFO L85 PathProgramCache]: Analyzing trace with hash 818150103, now seen corresponding path program 11 times [2021-11-09 08:39:32,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:32,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641222878] [2021-11-09 08:39:32,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:32,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 4 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:33,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:33,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641222878] [2021-11-09 08:39:33,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641222878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:33,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802436652] [2021-11-09 08:39:33,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:39:33,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:33,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:33,352 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:33,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 08:39:37,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 08:39:37,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 08:39:37,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:37,638 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:39:37,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-09 08:39:37,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 42 [2021-11-09 08:39:37,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 38 [2021-11-09 08:39:37,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:39:37,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:37,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:39:37,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 65 [2021-11-09 08:39:38,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:38,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:38,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:38,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:38,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:38,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:38,061 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:39:38,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 41 [2021-11-09 08:39:38,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:39:38,159 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:39:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:39:38,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802436652] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:38,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:38,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 30 [2021-11-09 08:39:38,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937894287] [2021-11-09 08:39:38,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:39:38,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:38,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:39:38,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:39:38,202 INFO L87 Difference]: Start difference. First operand 1146 states and 1497 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 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 08:39:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:41,782 INFO L93 Difference]: Finished difference Result 1420 states and 1821 transitions. [2021-11-09 08:39:41,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 08:39:41,783 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 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 55 [2021-11-09 08:39:41,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:41,788 INFO L225 Difference]: With dead ends: 1420 [2021-11-09 08:39:41,788 INFO L226 Difference]: Without dead ends: 1418 [2021-11-09 08:39:41,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=733, Invalid=4967, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 08:39:41,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2021-11-09 08:39:42,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1179. [2021-11-09 08:39:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1178 states have (on average 1.3123938879456707) internal successors, (1546), 1178 states have internal predecessors, (1546), 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 08:39:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1546 transitions. [2021-11-09 08:39:42,106 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1546 transitions. Word has length 55 [2021-11-09 08:39:42,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:42,107 INFO L470 AbstractCegarLoop]: Abstraction has 1179 states and 1546 transitions. [2021-11-09 08:39:42,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 30 states have internal predecessors, (80), 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 08:39:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1546 transitions. [2021-11-09 08:39:42,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:39:42,108 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:42,109 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:42,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:42,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-09 08:39:42,309 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:42,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:42,310 INFO L85 PathProgramCache]: Analyzing trace with hash 690924943, now seen corresponding path program 12 times [2021-11-09 08:39:42,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:42,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121202092] [2021-11-09 08:39:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:42,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:43,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:43,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121202092] [2021-11-09 08:39:43,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121202092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:43,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11705292] [2021-11-09 08:39:43,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:39:43,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:43,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:43,524 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:43,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 08:39:46,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 08:39:46,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:39:46,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 08:39:46,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:47,283 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:39:47,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-11-09 08:39:47,670 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-11-09 08:39:47,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 42 [2021-11-09 08:39:47,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:39:47,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:39:47,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-09 08:39:47,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154410940] [2021-11-09 08:39:47,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:39:47,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:39:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:39:47,880 INFO L87 Difference]: Start difference. First operand 1179 states and 1546 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 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 08:39:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:39:49,814 INFO L93 Difference]: Finished difference Result 1356 states and 1746 transitions. [2021-11-09 08:39:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:39:49,815 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 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 55 [2021-11-09 08:39:49,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:39:49,818 INFO L225 Difference]: With dead ends: 1356 [2021-11-09 08:39:49,818 INFO L226 Difference]: Without dead ends: 1354 [2021-11-09 08:39:49,819 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=357, Invalid=2193, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 08:39:49,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-11-09 08:39:50,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1182. [2021-11-09 08:39:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 1.3124470787468248) internal successors, (1550), 1181 states have internal predecessors, (1550), 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 08:39:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1550 transitions. [2021-11-09 08:39:50,139 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1550 transitions. Word has length 55 [2021-11-09 08:39:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:39:50,139 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 1550 transitions. [2021-11-09 08:39:50,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 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 08:39:50,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1550 transitions. [2021-11-09 08:39:50,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:39:50,141 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:39:50,141 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:39:50,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-09 08:39:50,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-09 08:39:50,342 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:39:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:39:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash -439492967, now seen corresponding path program 13 times [2021-11-09 08:39:50,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:39:50,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743608132] [2021-11-09 08:39:50,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:39:50,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:39:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:51,699 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 3 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:39:51,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:39:51,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743608132] [2021-11-09 08:39:51,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743608132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:51,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683613033] [2021-11-09 08:39:51,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:39:51,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:39:51,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:39:51,701 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:39:51,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 08:39:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:39:54,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 08:39:54,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:39:54,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:54,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-11-09 08:39:55,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,023 INFO L354 Elim1Store]: treesize reduction 95, result has 11.2 percent of original size [2021-11-09 08:39:55,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 41 [2021-11-09 08:39:55,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 58 [2021-11-09 08:39:55,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,355 INFO L354 Elim1Store]: treesize reduction 67, result has 23.0 percent of original size [2021-11-09 08:39:55,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 120 [2021-11-09 08:39:55,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 65 [2021-11-09 08:39:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2021-11-09 08:39:55,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:39:55,754 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:39:55,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 63 [2021-11-09 08:39:56,033 INFO L354 Elim1Store]: treesize reduction 195, result has 13.7 percent of original size [2021-11-09 08:39:56,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 57 [2021-11-09 08:39:56,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:39:56,184 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 1 case distinctions, treesize of input 46 treesize of output 30 [2021-11-09 08:39:56,223 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:39:56,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683613033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:39:56,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:39:56,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 38 [2021-11-09 08:39:56,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086553080] [2021-11-09 08:39:56,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 08:39:56,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:39:56,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 08:39:56,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:39:56,225 INFO L87 Difference]: Start difference. First operand 1182 states and 1550 transitions. Second operand has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 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 08:40:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:00,178 INFO L93 Difference]: Finished difference Result 1727 states and 2233 transitions. [2021-11-09 08:40:00,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-09 08:40:00,179 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 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 55 [2021-11-09 08:40:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:00,181 INFO L225 Difference]: With dead ends: 1727 [2021-11-09 08:40:00,181 INFO L226 Difference]: Without dead ends: 1316 [2021-11-09 08:40:00,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=593, Invalid=6717, Unknown=0, NotChecked=0, Total=7310 [2021-11-09 08:40:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-11-09 08:40:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 1143. [2021-11-09 08:40:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1142 states have (on average 1.308231173380035) internal successors, (1494), 1142 states have internal predecessors, (1494), 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 08:40:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1494 transitions. [2021-11-09 08:40:00,403 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1494 transitions. Word has length 55 [2021-11-09 08:40:00,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:00,403 INFO L470 AbstractCegarLoop]: Abstraction has 1143 states and 1494 transitions. [2021-11-09 08:40:00,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.236842105263158) internal successors, (85), 38 states have internal predecessors, (85), 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 08:40:00,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1494 transitions. [2021-11-09 08:40:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 08:40:00,404 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:00,404 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:00,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:00,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:00,605 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:00,605 INFO L85 PathProgramCache]: Analyzing trace with hash 282667376, now seen corresponding path program 14 times [2021-11-09 08:40:00,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:00,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444423897] [2021-11-09 08:40:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:00,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 43 proven. 74 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-09 08:40:00,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:00,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444423897] [2021-11-09 08:40:00,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444423897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:00,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124526107] [2021-11-09 08:40:00,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:40:00,887 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:00,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:00,888 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:00,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 08:40:03,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:40:03,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:03,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-09 08:40:03,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:03,617 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:40:03,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-09 08:40:03,868 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-11-09 08:40:03,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 38 [2021-11-09 08:40:03,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:40:03,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:40:03,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-09 08:40:03,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672896101] [2021-11-09 08:40:03,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 08:40:03,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:03,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 08:40:03,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:40:03,990 INFO L87 Difference]: Start difference. First operand 1143 states and 1494 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 08:40:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:05,026 INFO L93 Difference]: Finished difference Result 2511 states and 3284 transitions. [2021-11-09 08:40:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:40:05,026 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 55 [2021-11-09 08:40:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:05,029 INFO L225 Difference]: With dead ends: 2511 [2021-11-09 08:40:05,030 INFO L226 Difference]: Without dead ends: 1790 [2021-11-09 08:40:05,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:40:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-11-09 08:40:05,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1407. [2021-11-09 08:40:05,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 1.2958748221906116) internal successors, (1822), 1406 states have internal predecessors, (1822), 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 08:40:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 1822 transitions. [2021-11-09 08:40:05,384 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 1822 transitions. Word has length 55 [2021-11-09 08:40:05,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:05,384 INFO L470 AbstractCegarLoop]: Abstraction has 1407 states and 1822 transitions. [2021-11-09 08:40:05,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 08:40:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 1822 transitions. [2021-11-09 08:40:05,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 08:40:05,387 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:05,387 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:05,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:05,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:05,613 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:05,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1814256582, now seen corresponding path program 13 times [2021-11-09 08:40:05,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:05,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093303946] [2021-11-09 08:40:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:05,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:05,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:40:05,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:05,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093303946] [2021-11-09 08:40:05,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093303946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:05,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342587720] [2021-11-09 08:40:05,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:40:05,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:05,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:05,980 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:06,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 08:40:09,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:09,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 08:40:09,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:09,437 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 08:40:09,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2021-11-09 08:40:09,621 INFO L354 Elim1Store]: treesize reduction 86, result has 9.5 percent of original size [2021-11-09 08:40:09,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 34 [2021-11-09 08:40:09,757 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:40:09,758 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 54 treesize of output 30 [2021-11-09 08:40:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:40:09,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342587720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:09,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:09,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 22 [2021-11-09 08:40:09,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497167615] [2021-11-09 08:40:09,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:40:09,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:09,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:40:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:40:09,793 INFO L87 Difference]: Start difference. First operand 1407 states and 1822 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:13,176 INFO L93 Difference]: Finished difference Result 1848 states and 2351 transitions. [2021-11-09 08:40:13,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-09 08:40:13,177 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-09 08:40:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:13,180 INFO L225 Difference]: With dead ends: 1848 [2021-11-09 08:40:13,180 INFO L226 Difference]: Without dead ends: 1642 [2021-11-09 08:40:13,181 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 46 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=483, Invalid=5997, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 08:40:13,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-11-09 08:40:13,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1386. [2021-11-09 08:40:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 1.2902527075812273) internal successors, (1787), 1385 states have internal predecessors, (1787), 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 08:40:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 1787 transitions. [2021-11-09 08:40:13,493 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 1787 transitions. Word has length 56 [2021-11-09 08:40:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:13,494 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 1787 transitions. [2021-11-09 08:40:13,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 1787 transitions. [2021-11-09 08:40:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 08:40:13,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:13,495 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:13,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:13,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 08:40:13,696 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:13,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:13,696 INFO L85 PathProgramCache]: Analyzing trace with hash -874049928, now seen corresponding path program 9 times [2021-11-09 08:40:13,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:13,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32626199] [2021-11-09 08:40:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:13,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:15,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:15,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32626199] [2021-11-09 08:40:15,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32626199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:15,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803388082] [2021-11-09 08:40:15,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:40:15,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:15,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:15,804 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:15,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 08:40:18,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 08:40:18,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:18,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 08:40:18,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:18,592 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 08:40:18,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 08:40:18,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:18,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:18,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-11-09 08:40:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:19,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:19,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:19,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:40:19,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:19,069 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-09 08:40:19,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 43 [2021-11-09 08:40:19,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:19,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:19,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:19,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:40:19,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:19,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:19,345 INFO L354 Elim1Store]: treesize reduction 178, result has 15.2 percent of original size [2021-11-09 08:40:19,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 59 treesize of output 69 [2021-11-09 08:40:19,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:19,741 INFO L354 Elim1Store]: treesize reduction 187, result has 12.6 percent of original size [2021-11-09 08:40:19,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 53 [2021-11-09 08:40:20,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 34 [2021-11-09 08:40:20,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 36 [2021-11-09 08:40:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:40:20,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2021-11-09 08:40:20,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:20,352 INFO L354 Elim1Store]: treesize reduction 183, result has 14.5 percent of original size [2021-11-09 08:40:20,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 52 [2021-11-09 08:40:20,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:40:20,515 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:40:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:40:20,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803388082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:20,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:20,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26] total 46 [2021-11-09 08:40:20,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577745210] [2021-11-09 08:40:20,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 08:40:20,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:20,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 08:40:20,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:40:20,559 INFO L87 Difference]: Start difference. First operand 1386 states and 1787 transitions. Second operand has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 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 08:40:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:25,804 INFO L93 Difference]: Finished difference Result 1971 states and 2511 transitions. [2021-11-09 08:40:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-09 08:40:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 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 56 [2021-11-09 08:40:25,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:25,807 INFO L225 Difference]: With dead ends: 1971 [2021-11-09 08:40:25,807 INFO L226 Difference]: Without dead ends: 1689 [2021-11-09 08:40:25,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4927 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1243, Invalid=12563, Unknown=0, NotChecked=0, Total=13806 [2021-11-09 08:40:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-11-09 08:40:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1429. [2021-11-09 08:40:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 1.2899159663865547) internal successors, (1842), 1428 states have internal predecessors, (1842), 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 08:40:26,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 1842 transitions. [2021-11-09 08:40:26,311 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 1842 transitions. Word has length 56 [2021-11-09 08:40:26,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:26,311 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 1842 transitions. [2021-11-09 08:40:26,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.891304347826087) internal successors, (87), 46 states have internal predecessors, (87), 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 08:40:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 1842 transitions. [2021-11-09 08:40:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 08:40:26,314 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:26,314 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:26,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:26,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:26,530 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:26,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1694596765, now seen corresponding path program 14 times [2021-11-09 08:40:26,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:26,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912104299] [2021-11-09 08:40:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:26,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:40:27,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:27,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912104299] [2021-11-09 08:40:27,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912104299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:27,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283743253] [2021-11-09 08:40:27,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:40:27,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:27,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:27,127 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:27,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 08:40:29,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:40:29,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 08:40:29,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:30,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:30,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-11-09 08:40:30,271 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-11-09 08:40:30,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 47 [2021-11-09 08:40:30,567 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-09 08:40:30,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 39 [2021-11-09 08:40:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:40:30,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283743253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:30,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:30,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 20 [2021-11-09 08:40:30,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45291681] [2021-11-09 08:40:30,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 08:40:30,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 08:40:30,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-11-09 08:40:30,597 INFO L87 Difference]: Start difference. First operand 1429 states and 1842 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:32,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:32,721 INFO L93 Difference]: Finished difference Result 1641 states and 2079 transitions. [2021-11-09 08:40:32,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 08:40:32,721 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-09 08:40:32,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:32,724 INFO L225 Difference]: With dead ends: 1641 [2021-11-09 08:40:32,724 INFO L226 Difference]: Without dead ends: 1639 [2021-11-09 08:40:32,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 47 SyntacticMatches, 11 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=335, Invalid=2527, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:40:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1639 states. [2021-11-09 08:40:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1639 to 1441. [2021-11-09 08:40:33,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 1.2895833333333333) internal successors, (1857), 1440 states have internal predecessors, (1857), 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 08:40:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 1857 transitions. [2021-11-09 08:40:33,114 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 1857 transitions. Word has length 57 [2021-11-09 08:40:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:33,115 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 1857 transitions. [2021-11-09 08:40:33,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:40:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 1857 transitions. [2021-11-09 08:40:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-09 08:40:33,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:33,117 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:33,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:33,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:33,318 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:33,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1096473134, now seen corresponding path program 15 times [2021-11-09 08:40:33,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:33,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104206580] [2021-11-09 08:40:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:33,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 2 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:34,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:34,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104206580] [2021-11-09 08:40:34,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104206580] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:34,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675328906] [2021-11-09 08:40:34,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:40:34,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:34,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:34,519 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:34,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 08:40:37,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 08:40:37,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:37,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-09 08:40:37,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:37,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 29 [2021-11-09 08:40:37,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:37,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:40:37,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 32 [2021-11-09 08:40:38,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:40:38,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-09 08:40:38,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:40:38,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-09 08:40:38,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:40:38,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-09 08:40:38,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:40:38,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2021-11-09 08:40:38,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:40:38,941 INFO L354 Elim1Store]: treesize reduction 173, result has 14.4 percent of original size [2021-11-09 08:40:38,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 59 treesize of output 55 [2021-11-09 08:40:39,023 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:40:39,023 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 1 case distinctions, treesize of input 46 treesize of output 30 [2021-11-09 08:40:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:40:39,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675328906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:39,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:39,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 41 [2021-11-09 08:40:39,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965253433] [2021-11-09 08:40:39,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 08:40:39,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:39,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 08:40:39,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:40:39,067 INFO L87 Difference]: Start difference. First operand 1441 states and 1857 transitions. Second operand has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 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 08:40:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:43,487 INFO L93 Difference]: Finished difference Result 2091 states and 2643 transitions. [2021-11-09 08:40:43,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 08:40:43,487 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 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 57 [2021-11-09 08:40:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:43,491 INFO L225 Difference]: With dead ends: 2091 [2021-11-09 08:40:43,491 INFO L226 Difference]: Without dead ends: 2089 [2021-11-09 08:40:43,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2133 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=862, Invalid=5944, Unknown=0, NotChecked=0, Total=6806 [2021-11-09 08:40:43,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-11-09 08:40:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1407. [2021-11-09 08:40:44,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1407 states, 1406 states have (on average 1.2901849217638692) internal successors, (1814), 1406 states have internal predecessors, (1814), 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 08:40:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1407 states to 1407 states and 1814 transitions. [2021-11-09 08:40:44,010 INFO L78 Accepts]: Start accepts. Automaton has 1407 states and 1814 transitions. Word has length 57 [2021-11-09 08:40:44,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:44,010 INFO L470 AbstractCegarLoop]: Abstraction has 1407 states and 1814 transitions. [2021-11-09 08:40:44,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2439024390243905) internal successors, (92), 41 states have internal predecessors, (92), 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 08:40:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1407 states and 1814 transitions. [2021-11-09 08:40:44,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:40:44,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:44,012 INFO L513 BasicCegarLoop]: trace histogram [8, 6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:44,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:44,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:44,217 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:44,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:44,218 INFO L85 PathProgramCache]: Analyzing trace with hash 325910513, now seen corresponding path program 10 times [2021-11-09 08:40:44,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:44,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561303142] [2021-11-09 08:40:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:44,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:40:45,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:45,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561303142] [2021-11-09 08:40:45,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561303142] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:45,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3359706] [2021-11-09 08:40:45,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:40:45,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:45,264 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:45,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-09 08:40:47,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:40:47,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:47,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 08:40:47,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:47,981 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 08:40:47,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-09 08:40:48,215 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-11-09 08:40:48,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 39 [2021-11-09 08:40:48,448 INFO L354 Elim1Store]: treesize reduction 159, result has 25.7 percent of original size [2021-11-09 08:40:48,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 78 [2021-11-09 08:40:48,979 INFO L354 Elim1Store]: treesize reduction 313, result has 18.7 percent of original size [2021-11-09 08:40:48,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 83 treesize of output 106 [2021-11-09 08:40:49,965 INFO L354 Elim1Store]: treesize reduction 183, result has 12.0 percent of original size [2021-11-09 08:40:49,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 54 [2021-11-09 08:40:50,387 INFO L354 Elim1Store]: treesize reduction 159, result has 25.7 percent of original size [2021-11-09 08:40:50,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 76 [2021-11-09 08:40:50,787 INFO L354 Elim1Store]: treesize reduction 300, result has 23.7 percent of original size [2021-11-09 08:40:50,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 93 treesize of output 136 [2021-11-09 08:40:51,445 INFO L354 Elim1Store]: treesize reduction 136, result has 15.5 percent of original size [2021-11-09 08:40:51,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 49 [2021-11-09 08:40:51,957 INFO L354 Elim1Store]: treesize reduction 84, result has 7.7 percent of original size [2021-11-09 08:40:51,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 40 [2021-11-09 08:40:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 4 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:40:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3359706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:52,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:52,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-11-09 08:40:52,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171772371] [2021-11-09 08:40:52,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 08:40:52,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:52,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 08:40:52,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2651, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:40:52,011 INFO L87 Difference]: Start difference. First operand 1407 states and 1814 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 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 08:40:57,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:57,026 INFO L93 Difference]: Finished difference Result 1461 states and 1871 transitions. [2021-11-09 08:40:57,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-09 08:40:57,027 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 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 58 [2021-11-09 08:40:57,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:57,030 INFO L225 Difference]: With dead ends: 1461 [2021-11-09 08:40:57,030 INFO L226 Difference]: Without dead ends: 1409 [2021-11-09 08:40:57,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=551, Invalid=6421, Unknown=0, NotChecked=0, Total=6972 [2021-11-09 08:40:57,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-11-09 08:40:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1296. [2021-11-09 08:40:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1296 states, 1295 states have (on average 1.3011583011583012) internal successors, (1685), 1295 states have internal predecessors, (1685), 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 08:40:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1685 transitions. [2021-11-09 08:40:57,339 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1685 transitions. Word has length 58 [2021-11-09 08:40:57,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:57,340 INFO L470 AbstractCegarLoop]: Abstraction has 1296 states and 1685 transitions. [2021-11-09 08:40:57,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 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 08:40:57,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1685 transitions. [2021-11-09 08:40:57,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:40:57,343 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:57,343 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:57,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:57,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:57,569 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:40:57,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash 250984390, now seen corresponding path program 15 times [2021-11-09 08:40:57,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:57,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671832535] [2021-11-09 08:40:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:57,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:58,254 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:58,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:58,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671832535] [2021-11-09 08:40:58,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671832535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:58,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286068822] [2021-11-09 08:40:58,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:40:58,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:58,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:58,255 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:58,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-09 08:41:01,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-09 08:41:01,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:01,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:41:01,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:01,437 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-09 08:41:01,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 22 [2021-11-09 08:41:01,574 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-11-09 08:41:01,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 25 [2021-11-09 08:41:01,808 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:41:01,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-11-09 08:41:01,838 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:41:01,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286068822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:01,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:01,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2021-11-09 08:41:01,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252126231] [2021-11-09 08:41:01,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:41:01,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:41:01,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:41:01,839 INFO L87 Difference]: Start difference. First operand 1296 states and 1685 transitions. Second operand has 31 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 31 states have internal predecessors, (106), 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 08:41:03,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:03,740 INFO L93 Difference]: Finished difference Result 1405 states and 1802 transitions. [2021-11-09 08:41:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-09 08:41:03,740 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 31 states have internal predecessors, (106), 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 58 [2021-11-09 08:41:03,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:03,745 INFO L225 Difference]: With dead ends: 1405 [2021-11-09 08:41:03,746 INFO L226 Difference]: Without dead ends: 1403 [2021-11-09 08:41:03,746 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=265, Invalid=1991, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 08:41:03,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2021-11-09 08:41:04,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1301. [2021-11-09 08:41:04,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1301 states, 1300 states have (on average 1.3) internal successors, (1690), 1300 states have internal predecessors, (1690), 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 08:41:04,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1301 states to 1301 states and 1690 transitions. [2021-11-09 08:41:04,224 INFO L78 Accepts]: Start accepts. Automaton has 1301 states and 1690 transitions. Word has length 58 [2021-11-09 08:41:04,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:04,224 INFO L470 AbstractCegarLoop]: Abstraction has 1301 states and 1690 transitions. [2021-11-09 08:41:04,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 31 states have internal predecessors, (106), 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 08:41:04,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1301 states and 1690 transitions. [2021-11-09 08:41:04,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 08:41:04,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:04,226 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:04,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:04,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-09 08:41:04,430 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1455263116, now seen corresponding path program 16 times [2021-11-09 08:41:04,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:04,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611404271] [2021-11-09 08:41:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:04,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 9 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:05,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:05,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611404271] [2021-11-09 08:41:05,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611404271] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:05,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533258811] [2021-11-09 08:41:05,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:41:05,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:05,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:05,557 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:05,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-09 08:41:08,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:41:08,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:08,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-09 08:41:08,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:08,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:08,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-11-09 08:41:09,068 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-11-09 08:41:09,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 39 [2021-11-09 08:41:09,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 62 [2021-11-09 08:41:09,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-11-09 08:41:09,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,393 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:09,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 61 [2021-11-09 08:41:09,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:09,564 INFO L354 Elim1Store]: treesize reduction 173, result has 14.4 percent of original size [2021-11-09 08:41:09,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 59 treesize of output 55 [2021-11-09 08:41:09,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:09,655 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 1 case distinctions, treesize of input 46 treesize of output 30 [2021-11-09 08:41:09,691 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 12 proven. 113 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-09 08:41:09,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533258811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:09,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:09,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 19] total 34 [2021-11-09 08:41:09,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526094619] [2021-11-09 08:41:09,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 08:41:09,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:09,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 08:41:09,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 08:41:09,693 INFO L87 Difference]: Start difference. First operand 1301 states and 1690 transitions. Second operand has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 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 08:41:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:13,907 INFO L93 Difference]: Finished difference Result 1893 states and 2428 transitions. [2021-11-09 08:41:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-09 08:41:13,908 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 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 58 [2021-11-09 08:41:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:13,911 INFO L225 Difference]: With dead ends: 1893 [2021-11-09 08:41:13,912 INFO L226 Difference]: Without dead ends: 1431 [2021-11-09 08:41:13,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=847, Invalid=7709, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 08:41:13,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1431 states. [2021-11-09 08:41:14,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1431 to 1214. [2021-11-09 08:41:14,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 1.3017312448474856) internal successors, (1579), 1213 states have internal predecessors, (1579), 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 08:41:14,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1579 transitions. [2021-11-09 08:41:14,283 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1579 transitions. Word has length 58 [2021-11-09 08:41:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:14,283 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 1579 transitions. [2021-11-09 08:41:14,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 34 states have internal predecessors, (89), 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 08:41:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1579 transitions. [2021-11-09 08:41:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:41:14,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:14,285 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:14,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:14,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:14,489 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:14,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:14,490 INFO L85 PathProgramCache]: Analyzing trace with hash 239969839, now seen corresponding path program 8 times [2021-11-09 08:41:14,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:14,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279681358] [2021-11-09 08:41:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:14,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-09 08:41:14,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:14,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279681358] [2021-11-09 08:41:14,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279681358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:14,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297652872] [2021-11-09 08:41:14,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:41:14,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:14,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:14,766 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:14,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-09 08:41:17,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:41:17,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:17,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 08:41:17,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-09 08:41:17,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297652872] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:17,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:17,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-11-09 08:41:17,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722287427] [2021-11-09 08:41:17,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 08:41:17,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:17,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 08:41:17,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-11-09 08:41:17,916 INFO L87 Difference]: Start difference. First operand 1214 states and 1579 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 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 08:41:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:18,810 INFO L93 Difference]: Finished difference Result 1496 states and 1919 transitions. [2021-11-09 08:41:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 08:41:18,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 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 59 [2021-11-09 08:41:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:18,812 INFO L225 Difference]: With dead ends: 1496 [2021-11-09 08:41:18,812 INFO L226 Difference]: Without dead ends: 1469 [2021-11-09 08:41:18,813 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:41:18,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states. [2021-11-09 08:41:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1247. [2021-11-09 08:41:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 1246 states have (on average 1.2800963081861958) internal successors, (1595), 1246 states have internal predecessors, (1595), 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 08:41:19,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1595 transitions. [2021-11-09 08:41:19,166 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1595 transitions. Word has length 59 [2021-11-09 08:41:19,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:19,167 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 1595 transitions. [2021-11-09 08:41:19,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 18 states have internal predecessors, (55), 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 08:41:19,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1595 transitions. [2021-11-09 08:41:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:41:19,169 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:19,169 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:19,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:19,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:19,385 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:19,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:19,386 INFO L85 PathProgramCache]: Analyzing trace with hash -48802579, now seen corresponding path program 16 times [2021-11-09 08:41:19,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:19,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87812074] [2021-11-09 08:41:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:19,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 39 proven. 67 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 08:41:19,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:19,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87812074] [2021-11-09 08:41:19,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87812074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:19,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183017119] [2021-11-09 08:41:19,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:41:19,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:19,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:19,510 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:19,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-09 08:41:22,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:41:22,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:22,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 08:41:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 39 proven. 67 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-09 08:41:22,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183017119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:22,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:22,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-09 08:41:22,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605208637] [2021-11-09 08:41:22,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:41:22,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:41:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:41:22,301 INFO L87 Difference]: Start difference. First operand 1247 states and 1595 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 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 08:41:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:22,981 INFO L93 Difference]: Finished difference Result 1550 states and 1969 transitions. [2021-11-09 08:41:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:41:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 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 59 [2021-11-09 08:41:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:22,984 INFO L225 Difference]: With dead ends: 1550 [2021-11-09 08:41:22,984 INFO L226 Difference]: Without dead ends: 1275 [2021-11-09 08:41:22,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=332, Invalid=660, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:41:22,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-11-09 08:41:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1189. [2021-11-09 08:41:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 1.2676767676767677) internal successors, (1506), 1188 states have internal predecessors, (1506), 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 08:41:23,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1506 transitions. [2021-11-09 08:41:23,513 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1506 transitions. Word has length 59 [2021-11-09 08:41:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:23,513 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1506 transitions. [2021-11-09 08:41:23,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 13 states have internal predecessors, (57), 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 08:41:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1506 transitions. [2021-11-09 08:41:23,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:41:23,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:23,516 INFO L513 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:23,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:23,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-09 08:41:23,729 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:23,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2028813797, now seen corresponding path program 11 times [2021-11-09 08:41:23,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:23,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278896424] [2021-11-09 08:41:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:23,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:23,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 2 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:25,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:25,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278896424] [2021-11-09 08:41:25,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278896424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:25,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99755461] [2021-11-09 08:41:25,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:41:25,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:25,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:25,397 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:25,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-09 08:41:28,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-09 08:41:28,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:28,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 08:41:28,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:28,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:28,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:41:29,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,176 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:29,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-11-09 08:41:29,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:29,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 52 [2021-11-09 08:41:29,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:29,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,517 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-09 08:41:29,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 67 [2021-11-09 08:41:29,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:29,859 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:29,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 43 [2021-11-09 08:41:30,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:30,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 43 [2021-11-09 08:41:30,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 64 [2021-11-09 08:41:30,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 48 [2021-11-09 08:41:30,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:30,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:30,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 43 [2021-11-09 08:41:30,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:30,559 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:41:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:41:30,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99755461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:30,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:30,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 47 [2021-11-09 08:41:30,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382269200] [2021-11-09 08:41:30,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 08:41:30,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:30,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 08:41:30,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1940, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 08:41:30,636 INFO L87 Difference]: Start difference. First operand 1189 states and 1506 transitions. Second operand has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 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 08:41:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:34,618 INFO L93 Difference]: Finished difference Result 1340 states and 1673 transitions. [2021-11-09 08:41:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-09 08:41:34,619 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 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 59 [2021-11-09 08:41:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:34,621 INFO L225 Difference]: With dead ends: 1340 [2021-11-09 08:41:34,621 INFO L226 Difference]: Without dead ends: 1328 [2021-11-09 08:41:34,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2312 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=608, Invalid=6198, Unknown=0, NotChecked=0, Total=6806 [2021-11-09 08:41:34,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-11-09 08:41:34,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1207. [2021-11-09 08:41:34,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.2661691542288558) internal successors, (1527), 1206 states have internal predecessors, (1527), 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 08:41:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 1527 transitions. [2021-11-09 08:41:34,994 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 1527 transitions. Word has length 59 [2021-11-09 08:41:34,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:34,994 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 1527 transitions. [2021-11-09 08:41:34,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0638297872340425) internal successors, (97), 47 states have internal predecessors, (97), 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 08:41:34,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 1527 transitions. [2021-11-09 08:41:34,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 08:41:34,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:34,996 INFO L513 BasicCegarLoop]: trace histogram [8, 6, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:35,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:35,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-09 08:41:35,197 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:35,197 INFO L85 PathProgramCache]: Analyzing trace with hash 366112855, now seen corresponding path program 12 times [2021-11-09 08:41:35,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:35,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423378977] [2021-11-09 08:41:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:35,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 1 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:36,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:36,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423378977] [2021-11-09 08:41:36,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423378977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:36,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179395059] [2021-11-09 08:41:36,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:41:36,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:36,514 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:36,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-09 08:41:39,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-09 08:41:39,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 08:41:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:39,644 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:41:39,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 42 [2021-11-09 08:41:39,944 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-11-09 08:41:39,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 44 [2021-11-09 08:41:40,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 35 [2021-11-09 08:41:40,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 31 [2021-11-09 08:41:40,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,198 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-09 08:41:40,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 41 [2021-11-09 08:41:40,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,359 INFO L354 Elim1Store]: treesize reduction 114, result has 25.0 percent of original size [2021-11-09 08:41:40,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 63 [2021-11-09 08:41:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,529 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-09 08:41:40,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-11-09 08:41:40,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 64 [2021-11-09 08:41:40,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 48 [2021-11-09 08:41:40,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:40,823 INFO L354 Elim1Store]: treesize reduction 183, result has 14.5 percent of original size [2021-11-09 08:41:40,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 57 [2021-11-09 08:41:41,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:41,003 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 1 case distinctions, treesize of input 46 treesize of output 30 [2021-11-09 08:41:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:41:41,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179395059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:41,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:41,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24] total 41 [2021-11-09 08:41:41,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878232362] [2021-11-09 08:41:41,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 08:41:41,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:41,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 08:41:41,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:41:41,054 INFO L87 Difference]: Start difference. First operand 1207 states and 1527 transitions. Second operand has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 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 08:41:43,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:43,664 INFO L93 Difference]: Finished difference Result 1298 states and 1628 transitions. [2021-11-09 08:41:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 08:41:43,665 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 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 59 [2021-11-09 08:41:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:43,667 INFO L225 Difference]: With dead ends: 1298 [2021-11-09 08:41:43,667 INFO L226 Difference]: Without dead ends: 1286 [2021-11-09 08:41:43,667 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=388, Invalid=3272, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 08:41:43,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-11-09 08:41:43,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1198. [2021-11-09 08:41:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 1.266499582289056) internal successors, (1516), 1197 states have internal predecessors, (1516), 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 08:41:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1516 transitions. [2021-11-09 08:41:43,989 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1516 transitions. Word has length 59 [2021-11-09 08:41:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:43,989 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 1516 transitions. [2021-11-09 08:41:43,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.2195121951219514) internal successors, (91), 41 states have internal predecessors, (91), 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 08:41:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1516 transitions. [2021-11-09 08:41:43,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:41:43,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:43,991 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:44,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:44,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-09 08:41:44,192 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:44,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:44,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1494869776, now seen corresponding path program 17 times [2021-11-09 08:41:44,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:44,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654325095] [2021-11-09 08:41:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:44,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 9 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:41:45,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:45,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654325095] [2021-11-09 08:41:45,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654325095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:45,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827903734] [2021-11-09 08:41:45,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 08:41:45,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:45,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:45,328 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:45,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-09 08:41:52,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-09 08:41:52,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:52,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 08:41:52,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:52,228 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 08:41:52,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:41:52,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:52,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-11-09 08:41:52,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:52,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-11-09 08:41:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:52,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:52,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 54 [2021-11-09 08:41:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:53,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:53,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:53,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 43 [2021-11-09 08:41:53,221 INFO L354 Elim1Store]: treesize reduction 136, result has 15.5 percent of original size [2021-11-09 08:41:53,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 65 treesize of output 49 [2021-11-09 08:41:53,528 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-09 08:41:53,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 37 [2021-11-09 08:41:53,568 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:41:53,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827903734] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:53,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:53,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 41 [2021-11-09 08:41:53,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735567898] [2021-11-09 08:41:53,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 08:41:53,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:53,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 08:41:53,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1416, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:41:53,569 INFO L87 Difference]: Start difference. First operand 1198 states and 1516 transitions. Second operand has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 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 08:41:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:58,827 INFO L93 Difference]: Finished difference Result 1483 states and 1832 transitions. [2021-11-09 08:41:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 08:41:58,828 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-09 08:41:58,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:58,832 INFO L225 Difference]: With dead ends: 1483 [2021-11-09 08:41:58,832 INFO L226 Difference]: Without dead ends: 1481 [2021-11-09 08:41:58,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2892 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=993, Invalid=7563, Unknown=0, NotChecked=0, Total=8556 [2021-11-09 08:41:58,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-11-09 08:41:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1297. [2021-11-09 08:41:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 1.2631172839506173) internal successors, (1637), 1296 states have internal predecessors, (1637), 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 08:41:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 1637 transitions. [2021-11-09 08:41:59,367 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 1637 transitions. Word has length 60 [2021-11-09 08:41:59,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:59,368 INFO L470 AbstractCegarLoop]: Abstraction has 1297 states and 1637 transitions. [2021-11-09 08:41:59,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 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 08:41:59,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 1637 transitions. [2021-11-09 08:41:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:41:59,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:59,369 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:59,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:59,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:59,570 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:41:59,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:59,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1624893427, now seen corresponding path program 12 times [2021-11-09 08:41:59,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:59,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157742284] [2021-11-09 08:41:59,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:59,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:00,782 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 6 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:00,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:00,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157742284] [2021-11-09 08:42:00,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157742284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:00,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248344166] [2021-11-09 08:42:00,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:42:00,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:00,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:00,784 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:00,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-09 08:42:04,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-09 08:42:04,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:04,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 08:42:04,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:04,423 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:42:04,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:42:04,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:04,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:04,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:04,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 34 [2021-11-09 08:42:04,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:04,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:04,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:04,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:04,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-11-09 08:42:04,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:04,906 INFO L354 Elim1Store]: treesize reduction 67, result has 23.0 percent of original size [2021-11-09 08:42:04,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-11-09 08:42:04,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 63 [2021-11-09 08:42:04,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:04,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 47 [2021-11-09 08:42:05,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:05,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 62 [2021-11-09 08:42:05,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,311 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:05,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 50 [2021-11-09 08:42:05,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:05,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:05,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 41 [2021-11-09 08:42:05,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:05,560 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:42:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 130 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:42:05,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248344166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:05,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:05,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 37 [2021-11-09 08:42:05,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822407981] [2021-11-09 08:42:05,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 08:42:05,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:05,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 08:42:05,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 08:42:05,598 INFO L87 Difference]: Start difference. First operand 1297 states and 1637 transitions. Second operand has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 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 08:42:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:09,472 INFO L93 Difference]: Finished difference Result 1704 states and 2146 transitions. [2021-11-09 08:42:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 08:42:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-09 08:42:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:09,475 INFO L225 Difference]: With dead ends: 1704 [2021-11-09 08:42:09,475 INFO L226 Difference]: Without dead ends: 1506 [2021-11-09 08:42:09,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=819, Invalid=5987, Unknown=0, NotChecked=0, Total=6806 [2021-11-09 08:42:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-09 08:42:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1324. [2021-11-09 08:42:09,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 1.2660619803476947) internal successors, (1675), 1323 states have internal predecessors, (1675), 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 08:42:09,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1675 transitions. [2021-11-09 08:42:09,852 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1675 transitions. Word has length 60 [2021-11-09 08:42:09,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:09,852 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 1675 transitions. [2021-11-09 08:42:09,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5135135135135136) internal successors, (93), 37 states have internal predecessors, (93), 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 08:42:09,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1675 transitions. [2021-11-09 08:42:09,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:42:09,854 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:09,854 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:09,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-09 08:42:10,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:10,054 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:10,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:10,055 INFO L85 PathProgramCache]: Analyzing trace with hash 814010745, now seen corresponding path program 13 times [2021-11-09 08:42:10,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:10,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555106215] [2021-11-09 08:42:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:10,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 139 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:42:10,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:10,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555106215] [2021-11-09 08:42:10,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555106215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:10,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124066496] [2021-11-09 08:42:10,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:42:10,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:10,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:10,881 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:10,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-09 08:42:14,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:14,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 08:42:14,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:14,858 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:42:14,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:42:15,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:15,082 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:42:15,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-11-09 08:42:15,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:15,154 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:42:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 18 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:42:15,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124066496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:15,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:15,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 31 [2021-11-09 08:42:15,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367544985] [2021-11-09 08:42:15,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:42:15,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:15,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:42:15,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:42:15,187 INFO L87 Difference]: Start difference. First operand 1324 states and 1675 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 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 08:42:17,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:17,707 INFO L93 Difference]: Finished difference Result 1526 states and 1907 transitions. [2021-11-09 08:42:17,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:42:17,708 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-09 08:42:17,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:17,710 INFO L225 Difference]: With dead ends: 1526 [2021-11-09 08:42:17,710 INFO L226 Difference]: Without dead ends: 1524 [2021-11-09 08:42:17,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=456, Invalid=2736, Unknown=0, NotChecked=0, Total=3192 [2021-11-09 08:42:17,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1524 states. [2021-11-09 08:42:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1524 to 1324. [2021-11-09 08:42:18,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 1.2660619803476947) internal successors, (1675), 1323 states have internal predecessors, (1675), 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 08:42:18,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 1675 transitions. [2021-11-09 08:42:18,162 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 1675 transitions. Word has length 60 [2021-11-09 08:42:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:18,163 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 1675 transitions. [2021-11-09 08:42:18,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 states have internal predecessors, (77), 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 08:42:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 1675 transitions. [2021-11-09 08:42:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:42:18,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:18,165 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:18,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:18,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:18,365 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:18,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1503885381, now seen corresponding path program 14 times [2021-11-09 08:42:18,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:18,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156069482] [2021-11-09 08:42:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:18,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 6 proven. 133 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-09 08:42:19,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:19,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156069482] [2021-11-09 08:42:19,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156069482] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:19,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132438732] [2021-11-09 08:42:19,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:42:19,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:19,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:19,411 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:19,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-09 08:42:22,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:42:22,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:22,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 08:42:22,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:23,229 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:42:23,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:42:23,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:23,436 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:42:23,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:42:23,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:23,578 INFO L354 Elim1Store]: treesize reduction 58, result has 22.7 percent of original size [2021-11-09 08:42:23,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:42:23,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 65 [2021-11-09 08:42:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:23,685 INFO L354 Elim1Store]: treesize reduction 122, result has 18.7 percent of original size [2021-11-09 08:42:23,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 124 treesize of output 120 [2021-11-09 08:42:23,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:23,942 INFO L354 Elim1Store]: treesize reduction 295, result has 17.1 percent of original size [2021-11-09 08:42:23,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 92 [2021-11-09 08:42:24,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:24,835 INFO L354 Elim1Store]: treesize reduction 362, result has 26.0 percent of original size [2021-11-09 08:42:24,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 171 [2021-11-09 08:42:25,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:25,327 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:42:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 8 proven. 111 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:42:25,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132438732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:25,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:25,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 31 [2021-11-09 08:42:25,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838959608] [2021-11-09 08:42:25,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:42:25,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:25,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:42:25,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-11-09 08:42:25,359 INFO L87 Difference]: Start difference. First operand 1324 states and 1675 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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 08:42:36,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:36,142 INFO L93 Difference]: Finished difference Result 1901 states and 2405 transitions. [2021-11-09 08:42:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 08:42:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-09 08:42:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:36,144 INFO L225 Difference]: With dead ends: 1901 [2021-11-09 08:42:36,144 INFO L226 Difference]: Without dead ends: 1899 [2021-11-09 08:42:36,145 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=686, Invalid=3346, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 08:42:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2021-11-09 08:42:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1613. [2021-11-09 08:42:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 1.2797766749379653) internal successors, (2063), 1612 states have internal predecessors, (2063), 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 08:42:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 2063 transitions. [2021-11-09 08:42:36,600 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 2063 transitions. Word has length 60 [2021-11-09 08:42:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:36,600 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 2063 transitions. [2021-11-09 08:42:36,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 31 states have internal predecessors, (79), 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 08:42:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 2063 transitions. [2021-11-09 08:42:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:42:36,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:36,602 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:36,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:36,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-09 08:42:36,806 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:36,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:36,806 INFO L85 PathProgramCache]: Analyzing trace with hash 340199353, now seen corresponding path program 18 times [2021-11-09 08:42:36,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:36,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745336716] [2021-11-09 08:42:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:36,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:36,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:42:37,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:37,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745336716] [2021-11-09 08:42:37,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745336716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:37,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294541643] [2021-11-09 08:42:37,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 08:42:37,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:37,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:37,622 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:37,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-09 08:42:41,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 08:42:41,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:41,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 08:42:41,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:41,231 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 08:42:41,460 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-09 08:42:41,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:42:41,616 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-09 08:42:41,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 08:42:41,707 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-09 08:42:41,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 34 [2021-11-09 08:42:41,825 INFO L354 Elim1Store]: treesize reduction 126, result has 21.3 percent of original size [2021-11-09 08:42:41,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 55 [2021-11-09 08:42:42,106 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:42:42,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-11-09 08:42:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:42:42,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294541643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:42,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:42,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-11-09 08:42:42,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180270423] [2021-11-09 08:42:42,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-09 08:42:42,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:42,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-09 08:42:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1493, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 08:42:42,155 INFO L87 Difference]: Start difference. First operand 1613 states and 2063 transitions. Second operand has 41 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 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 08:42:44,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:44,973 INFO L93 Difference]: Finished difference Result 1816 states and 2297 transitions. [2021-11-09 08:42:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 08:42:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 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) Word has length 61 [2021-11-09 08:42:44,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:44,975 INFO L225 Difference]: With dead ends: 1816 [2021-11-09 08:42:44,975 INFO L226 Difference]: Without dead ends: 1794 [2021-11-09 08:42:44,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=338, Invalid=3202, Unknown=0, NotChecked=0, Total=3540 [2021-11-09 08:42:44,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2021-11-09 08:42:45,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 1727. [2021-11-09 08:42:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 1.2711471610660487) internal successors, (2194), 1726 states have internal predecessors, (2194), 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 08:42:45,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 2194 transitions. [2021-11-09 08:42:45,454 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 2194 transitions. Word has length 61 [2021-11-09 08:42:45,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:45,454 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 2194 transitions. [2021-11-09 08:42:45,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.731707317073171) internal successors, (112), 41 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 08:42:45,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 2194 transitions. [2021-11-09 08:42:45,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:42:45,456 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:45,456 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:45,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:45,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:45,657 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1302581154, now seen corresponding path program 19 times [2021-11-09 08:42:45,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:45,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729878692] [2021-11-09 08:42:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:45,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:46,359 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:42:46,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:46,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729878692] [2021-11-09 08:42:46,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729878692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:46,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027441374] [2021-11-09 08:42:46,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:42:46,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:46,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:46,362 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:46,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-09 08:42:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 08:42:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:50,016 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 25 treesize of output 21 [2021-11-09 08:42:50,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 08:42:50,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:50,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-11-09 08:42:50,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,622 INFO L354 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-11-09 08:42:50,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-11-09 08:42:50,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:50,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 40 [2021-11-09 08:42:50,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:50,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:50,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:50,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 56 treesize of output 67 [2021-11-09 08:42:51,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:51,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:51,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:51,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:51,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:51,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:51,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 43 [2021-11-09 08:42:51,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:51,387 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 1 case distinctions, treesize of input 44 treesize of output 28 [2021-11-09 08:42:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:42:51,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027441374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:51,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:51,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-11-09 08:42:51,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691625927] [2021-11-09 08:42:51,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 08:42:51,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 08:42:51,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 08:42:51,454 INFO L87 Difference]: Start difference. First operand 1727 states and 2194 transitions. Second operand has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 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 08:42:54,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:54,644 INFO L93 Difference]: Finished difference Result 1906 states and 2403 transitions. [2021-11-09 08:42:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 08:42:54,644 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 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 61 [2021-11-09 08:42:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:54,646 INFO L225 Difference]: With dead ends: 1906 [2021-11-09 08:42:54,646 INFO L226 Difference]: Without dead ends: 1904 [2021-11-09 08:42:54,647 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=577, Invalid=5903, Unknown=0, NotChecked=0, Total=6480 [2021-11-09 08:42:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2021-11-09 08:42:55,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 1758. [2021-11-09 08:42:55,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1758 states, 1757 states have (on average 1.2720546385885032) internal successors, (2235), 1757 states have internal predecessors, (2235), 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 08:42:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1758 states to 1758 states and 2235 transitions. [2021-11-09 08:42:55,206 INFO L78 Accepts]: Start accepts. Automaton has 1758 states and 2235 transitions. Word has length 61 [2021-11-09 08:42:55,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:55,207 INFO L470 AbstractCegarLoop]: Abstraction has 1758 states and 2235 transitions. [2021-11-09 08:42:55,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.3043478260869565) internal successors, (106), 46 states have internal predecessors, (106), 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 08:42:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1758 states and 2235 transitions. [2021-11-09 08:42:55,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:42:55,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:55,209 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:55,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:55,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:55,410 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:42:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:55,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1463143778, now seen corresponding path program 20 times [2021-11-09 08:42:55,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:55,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682359633] [2021-11-09 08:42:55,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:55,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:42:55,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:55,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682359633] [2021-11-09 08:42:55,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682359633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:55,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639956537] [2021-11-09 08:42:55,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:42:55,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:55,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:55,929 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:55,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-09 08:42:59,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:42:59,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:42:59,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 08:42:59,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:59,512 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 08:42:59,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-09 08:42:59,711 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 08:42:59,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:42:59,823 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:42:59,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-11-09 08:42:59,856 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-09 08:42:59,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639956537] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:59,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:59,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 30 [2021-11-09 08:42:59,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943595443] [2021-11-09 08:42:59,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:42:59,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:59,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:42:59,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:42:59,857 INFO L87 Difference]: Start difference. First operand 1758 states and 2235 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 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 08:43:02,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:02,445 INFO L93 Difference]: Finished difference Result 2214 states and 2809 transitions. [2021-11-09 08:43:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 08:43:02,446 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 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 61 [2021-11-09 08:43:02,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:02,448 INFO L225 Difference]: With dead ends: 2214 [2021-11-09 08:43:02,448 INFO L226 Difference]: Without dead ends: 2212 [2021-11-09 08:43:02,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=385, Invalid=2477, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 08:43:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-11-09 08:43:03,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1908. [2021-11-09 08:43:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1908 states, 1907 states have (on average 1.2773990561090718) internal successors, (2436), 1907 states have internal predecessors, (2436), 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 08:43:03,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1908 states to 1908 states and 2436 transitions. [2021-11-09 08:43:03,033 INFO L78 Accepts]: Start accepts. Automaton has 1908 states and 2436 transitions. Word has length 61 [2021-11-09 08:43:03,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:03,034 INFO L470 AbstractCegarLoop]: Abstraction has 1908 states and 2436 transitions. [2021-11-09 08:43:03,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 states have internal predecessors, (85), 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 08:43:03,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1908 states and 2436 transitions. [2021-11-09 08:43:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:43:03,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:03,036 INFO L513 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:03,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-09 08:43:03,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-09 08:43:03,237 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:43:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1484494864, now seen corresponding path program 13 times [2021-11-09 08:43:03,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:03,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105986862] [2021-11-09 08:43:03,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:03,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:03,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 08:43:03,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:03,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105986862] [2021-11-09 08:43:03,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105986862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:03,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550707673] [2021-11-09 08:43:03,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 08:43:03,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:03,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:03,697 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:03,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-09 08:43:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:07,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 08:43:07,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:07,698 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-11-09 08:43:07,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-09 08:43:07,855 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 08:43:07,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-11-09 08:43:07,958 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-09 08:43:07,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-11-09 08:43:08,091 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 08:43:08,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-11-09 08:43:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-09 08:43:08,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550707673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:08,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:08,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 30 [2021-11-09 08:43:08,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936046524] [2021-11-09 08:43:08,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 08:43:08,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 08:43:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2021-11-09 08:43:08,131 INFO L87 Difference]: Start difference. First operand 1908 states and 2436 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 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 08:43:10,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:10,373 INFO L93 Difference]: Finished difference Result 2206 states and 2805 transitions. [2021-11-09 08:43:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 08:43:10,374 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 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) Word has length 61 [2021-11-09 08:43:10,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:10,376 INFO L225 Difference]: With dead ends: 2206 [2021-11-09 08:43:10,376 INFO L226 Difference]: Without dead ends: 2204 [2021-11-09 08:43:10,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=353, Invalid=1999, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 08:43:10,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-11-09 08:43:10,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 1874. [2021-11-09 08:43:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1874 states, 1873 states have (on average 1.2786972770955687) internal successors, (2395), 1873 states have internal predecessors, (2395), 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 08:43:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2395 transitions. [2021-11-09 08:43:10,950 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2395 transitions. Word has length 61 [2021-11-09 08:43:10,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:10,950 INFO L470 AbstractCegarLoop]: Abstraction has 1874 states and 2395 transitions. [2021-11-09 08:43:10,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 30 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 08:43:10,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2395 transitions. [2021-11-09 08:43:10,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 08:43:10,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:10,952 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:10,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:11,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-09 08:43:11,158 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:43:11,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:11,158 INFO L85 PathProgramCache]: Analyzing trace with hash 234517352, now seen corresponding path program 14 times [2021-11-09 08:43:11,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:11,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144336329] [2021-11-09 08:43:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:11,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 15 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:12,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:12,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144336329] [2021-11-09 08:43:12,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144336329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:12,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277188179] [2021-11-09 08:43:12,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:43:12,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:12,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:12,608 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:12,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-09 08:43:16,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:43:16,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:16,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 08:43:16,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:16,714 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-11-09 08:43:16,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2021-11-09 08:43:16,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:43:16,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:16,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-11-09 08:43:16,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362800201] [2021-11-09 08:43:16,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 08:43:16,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:16,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 08:43:16,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 08:43:16,869 INFO L87 Difference]: Start difference. First operand 1874 states and 2395 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:22,224 INFO L93 Difference]: Finished difference Result 2118 states and 2672 transitions. [2021-11-09 08:43:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 08:43:22,225 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-09 08:43:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:22,228 INFO L225 Difference]: With dead ends: 2118 [2021-11-09 08:43:22,228 INFO L226 Difference]: Without dead ends: 2116 [2021-11-09 08:43:22,229 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3079 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1311, Invalid=8001, Unknown=0, NotChecked=0, Total=9312 [2021-11-09 08:43:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-11-09 08:43:22,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1892. [2021-11-09 08:43:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 1.277102062400846) internal successors, (2415), 1891 states have internal predecessors, (2415), 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 08:43:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2415 transitions. [2021-11-09 08:43:22,857 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2415 transitions. Word has length 62 [2021-11-09 08:43:22,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:22,857 INFO L470 AbstractCegarLoop]: Abstraction has 1892 states and 2415 transitions. [2021-11-09 08:43:22,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2415 transitions. [2021-11-09 08:43:22,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 08:43:22,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:22,860 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:22,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:23,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-09 08:43:23,061 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:43:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:23,061 INFO L85 PathProgramCache]: Analyzing trace with hash -254820432, now seen corresponding path program 15 times [2021-11-09 08:43:23,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:23,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356012912] [2021-11-09 08:43:23,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:23,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 08:43:24,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:24,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356012912] [2021-11-09 08:43:24,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356012912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:24,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156060311] [2021-11-09 08:43:24,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:43:24,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:24,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:24,296 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:24,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-09 08:43:28,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-09 08:43:28,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 08:43:28,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:28,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:28,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-11-09 08:43:28,836 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-11-09 08:43:28,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 41 [2021-11-09 08:43:28,939 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~i~0] [2021-11-09 08:43:28,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 08:43:28,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-09 08:43:28,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097191475] [2021-11-09 08:43:28,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 08:43:28,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 08:43:28,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:43:28,940 INFO L87 Difference]: Start difference. First operand 1892 states and 2415 transitions. Second operand has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:43:32,748 INFO L93 Difference]: Finished difference Result 2164 states and 2712 transitions. [2021-11-09 08:43:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-09 08:43:32,748 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-09 08:43:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:43:32,751 INFO L225 Difference]: With dead ends: 2164 [2021-11-09 08:43:32,751 INFO L226 Difference]: Without dead ends: 2162 [2021-11-09 08:43:32,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=535, Invalid=4577, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 08:43:32,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2162 states. [2021-11-09 08:43:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2162 to 1859. [2021-11-09 08:43:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.279870828848224) internal successors, (2378), 1858 states have internal predecessors, (2378), 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 08:43:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2378 transitions. [2021-11-09 08:43:33,324 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2378 transitions. Word has length 62 [2021-11-09 08:43:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:43:33,324 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2378 transitions. [2021-11-09 08:43:33,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 08:43:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2378 transitions. [2021-11-09 08:43:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 08:43:33,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:43:33,327 INFO L513 BasicCegarLoop]: trace histogram [9, 7, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:43:33,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-09 08:43:33,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:33,528 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:43:33,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:43:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1885365338, now seen corresponding path program 16 times [2021-11-09 08:43:33,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:43:33,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599759399] [2021-11-09 08:43:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:43:33,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:43:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:43:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:43:35,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:43:35,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599759399] [2021-11-09 08:43:35,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599759399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:35,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109863986] [2021-11-09 08:43:35,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 08:43:35,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:43:35,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:43:35,381 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:43:35,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-09 08:43:39,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 08:43:39,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:43:39,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 08:43:39,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:43:39,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:39,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-11-09 08:43:39,869 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-11-09 08:43:39,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 39 [2021-11-09 08:43:40,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-09 08:43:40,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:40,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:40,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:40,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:40,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:40,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2021-11-09 08:43:40,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:40,319 INFO L354 Elim1Store]: treesize reduction 107, result has 28.7 percent of original size [2021-11-09 08:43:40,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 65 [2021-11-09 08:43:47,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:47,927 INFO L354 Elim1Store]: treesize reduction 263, result has 27.7 percent of original size [2021-11-09 08:43:47,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 140 [2021-11-09 08:43:48,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:49,015 INFO L354 Elim1Store]: treesize reduction 255, result has 18.0 percent of original size [2021-11-09 08:43:49,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 69 treesize of output 84 [2021-11-09 08:43:53,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:53,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:53,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:53,683 INFO L354 Elim1Store]: treesize reduction 130, result has 14.5 percent of original size [2021-11-09 08:43:53,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 50 [2021-11-09 08:43:53,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 69 [2021-11-09 08:43:53,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:53,846 INFO L354 Elim1Store]: treesize reduction 130, result has 18.8 percent of original size [2021-11-09 08:43:53,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 124 [2021-11-09 08:43:54,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:54,201 INFO L354 Elim1Store]: treesize reduction 200, result has 23.1 percent of original size [2021-11-09 08:43:54,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 88 [2021-11-09 08:43:54,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:43:54,430 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 1 case distinctions, treesize of input 46 treesize of output 30 [2021-11-09 08:43:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 5 proven. 125 refuted. 2 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-09 08:43:54,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109863986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:54,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:54,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29] total 51 [2021-11-09 08:43:54,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805122832] [2021-11-09 08:43:54,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-09 08:43:54,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:54,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-09 08:43:54,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2327, Unknown=6, NotChecked=0, Total=2550 [2021-11-09 08:43:54,483 INFO L87 Difference]: Start difference. First operand 1859 states and 2378 transitions. Second operand has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 states have internal predecessors, (98), 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 08:44:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:44:59,833 INFO L93 Difference]: Finished difference Result 2361 states and 2972 transitions. [2021-11-09 08:44:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-09 08:44:59,834 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 states have internal predecessors, (98), 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 62 [2021-11-09 08:44:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:44:59,836 INFO L225 Difference]: With dead ends: 2361 [2021-11-09 08:44:59,836 INFO L226 Difference]: Without dead ends: 2349 [2021-11-09 08:44:59,837 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5372 ImplicationChecksByTransitivity, 39.9s TimeCoverageRelationStatistics Valid=1320, Invalid=14665, Unknown=17, NotChecked=0, Total=16002 [2021-11-09 08:44:59,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2021-11-09 08:45:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2036. [2021-11-09 08:45:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 1.282063882063882) internal successors, (2609), 2035 states have internal predecessors, (2609), 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 08:45:00,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 2609 transitions. [2021-11-09 08:45:00,503 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 2609 transitions. Word has length 62 [2021-11-09 08:45:00,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:00,503 INFO L470 AbstractCegarLoop]: Abstraction has 2036 states and 2609 transitions. [2021-11-09 08:45:00,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9215686274509804) internal successors, (98), 51 states have internal predecessors, (98), 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 08:45:00,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 2609 transitions. [2021-11-09 08:45:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 08:45:00,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:00,505 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:00,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-11-09 08:45:00,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-11-09 08:45:00,706 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 08:45:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:00,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1282439615, now seen corresponding path program 21 times [2021-11-09 08:45:00,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:00,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995308630] [2021-11-09 08:45:00,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:00,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:01,630 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:01,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:01,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995308630] [2021-11-09 08:45:01,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995308630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:01,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559299942] [2021-11-09 08:45:01,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:45:01,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:01,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:01,632 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:01,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_976e03ec-9c91-4caa-813c-daad2e9bc04d/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process