./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro --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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:18:53,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:18:53,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:18:53,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:18:53,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:18:53,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:18:53,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:18:53,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:18:53,308 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:18:53,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:18:53,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:18:53,320 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:18:53,320 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:18:53,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:18:53,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:18:53,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:18:53,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:18:53,325 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:18:53,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:18:53,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:18:53,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:18:53,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:18:53,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:18:53,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:18:53,352 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:18:53,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:18:53,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:18:53,354 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:18:53,354 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:18:53,355 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:18:53,356 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:18:53,356 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:18:53,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:18:53,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:18:53,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:18:53,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:18:53,367 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:18:53,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:18:53,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:18:53,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:18:53,369 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:18:53,370 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:18:53,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:18:53,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:18:53,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:18:53,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:18:53,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:18:53,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:18:53,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:18:53,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:18:53,415 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:18:53,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:18:53,416 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:18:53,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:18:53,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:18:53,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:18:53,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:18:53,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:18:53,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:18:53,418 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:18:53,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:18:53,418 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:18:53,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:18:53,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:18:53,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:18:53,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:18:53,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:18:53,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:18:53,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:18:53,419 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:18:53,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:18:53,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:18:53,420 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:18:53,420 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:18:53,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:18:53,421 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_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2022-11-18 20:18:53,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:18:53,765 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:18:53,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:18:53,769 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:18:53,770 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:18:53,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-11-18 20:18:53,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/data/7846a8408/0b22da08568448b986d7acf2fd99a05a/FLAG8f7f3fd78 [2022-11-18 20:18:54,292 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:18:54,292 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-11-18 20:18:54,309 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/data/7846a8408/0b22da08568448b986d7acf2fd99a05a/FLAG8f7f3fd78 [2022-11-18 20:18:54,687 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/data/7846a8408/0b22da08568448b986d7acf2fd99a05a [2022-11-18 20:18:54,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:18:54,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:18:54,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:18:54,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:18:54,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:18:54,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:18:54" (1/1) ... [2022-11-18 20:18:54,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@441aa9fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:54, skipping insertion in model container [2022-11-18 20:18:54,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:18:54" (1/1) ... [2022-11-18 20:18:54,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:18:54,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:18:54,961 WARN L234 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_f4ff2661-a799-4310-b01d-d678864943bd/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-11-18 20:18:54,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:18:54,988 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:18:55,007 WARN L234 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_f4ff2661-a799-4310-b01d-d678864943bd/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-11-18 20:18:55,032 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:18:55,050 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:18:55,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55 WrapperNode [2022-11-18 20:18:55,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:18:55,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:18:55,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:18:55,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:18:55,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,108 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-11-18 20:18:55,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:18:55,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:18:55,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:18:55,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:18:55,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,152 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:18:55,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:18:55,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:18:55,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:18:55,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (1/1) ... [2022-11-18 20:18:55,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:18:55,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:55,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:18:55,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:18:55,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:18:55,242 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 20:18:55,242 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 20:18:55,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:18:55,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:18:55,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:18:55,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:18:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:18:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:18:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:18:55,331 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:18:55,334 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:18:55,573 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:18:55,579 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:18:55,580 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:18:55,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:18:55 BoogieIcfgContainer [2022-11-18 20:18:55,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:18:55,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:18:55,600 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:18:55,604 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:18:55,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:18:54" (1/3) ... [2022-11-18 20:18:55,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4e0b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:18:55, skipping insertion in model container [2022-11-18 20:18:55,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:18:55" (2/3) ... [2022-11-18 20:18:55,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4e0b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:18:55, skipping insertion in model container [2022-11-18 20:18:55,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:18:55" (3/3) ... [2022-11-18 20:18:55,620 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2022-11-18 20:18:55,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:18:55,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:18:55,721 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:18:55,728 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@40c16ce0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:18:55,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:18:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:18:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-18 20:18:55,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:55,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:55,744 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:55,750 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2022-11-18 20:18:55,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:55,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333207758] [2022-11-18 20:18:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:55,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:56,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:18:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:56,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:18:56,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:18:56,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333207758] [2022-11-18 20:18:56,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333207758] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:18:56,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:18:56,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:18:56,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97987568] [2022-11-18 20:18:56,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:18:56,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:18:56,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:56,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:18:56,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:18:56,352 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:18:56,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:56,435 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2022-11-18 20:18:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:18:56,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-18 20:18:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:56,445 INFO L225 Difference]: With dead ends: 64 [2022-11-18 20:18:56,445 INFO L226 Difference]: Without dead ends: 27 [2022-11-18 20:18:56,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:18:56,454 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:56,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:18:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-18 20:18:56,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-18 20:18:56,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:18:56,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-11-18 20:18:56,512 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2022-11-18 20:18:56,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:56,514 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-11-18 20:18:56,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:18:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-11-18 20:18:56,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-18 20:18:56,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:56,520 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:56,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:18:56,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2022-11-18 20:18:56,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:56,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094770273] [2022-11-18 20:18:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:56,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:56,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:18:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:56,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:18:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:18:56,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:56,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094770273] [2022-11-18 20:18:56,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094770273] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:18:56,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:18:56,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:18:56,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762447997] [2022-11-18 20:18:56,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:18:56,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:18:56,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:56,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:18:56,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:18:56,690 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:18:56,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:18:56,779 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-11-18 20:18:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:18:56,780 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), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-11-18 20:18:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:18:56,781 INFO L225 Difference]: With dead ends: 50 [2022-11-18 20:18:56,781 INFO L226 Difference]: Without dead ends: 36 [2022-11-18 20:18:56,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:18:56,783 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:18:56,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 69 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:18:56,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-18 20:18:56,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-11-18 20:18:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-18 20:18:56,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-11-18 20:18:56,792 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-11-18 20:18:56,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:18:56,792 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-11-18 20:18:56,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:18:56,793 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-11-18 20:18:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 20:18:56,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:18:56,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:18:56,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:18:56,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:18:56,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:18:56,801 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2022-11-18 20:18:56,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:18:56,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293068688] [2022-11-18 20:18:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:18:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:57,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:18:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:57,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:18:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:57,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:18:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:18:57,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:18:57,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293068688] [2022-11-18 20:18:57,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293068688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:18:57,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667739626] [2022-11-18 20:18:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:18:57,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:18:57,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:18:57,790 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:18:57,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:18:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:18:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-18 20:18:57,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:18:58,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:18:58,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:18:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:18:58,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:00,513 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:19:00,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-11-18 20:19:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:19:00,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667739626] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:19:00,594 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:19:00,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-11-18 20:19:00,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939780874] [2022-11-18 20:19:00,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:00,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:19:00,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:00,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:19:00,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=330, Unknown=1, NotChecked=0, Total=420 [2022-11-18 20:19:00,597 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:19:00,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:00,869 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-11-18 20:19:00,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:19:00,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-11-18 20:19:00,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:00,871 INFO L225 Difference]: With dead ends: 54 [2022-11-18 20:19:00,872 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 20:19:00,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2022-11-18 20:19:00,874 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 80 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:00,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 159 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 198 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-11-18 20:19:00,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 20:19:00,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-11-18 20:19:00,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:19:00,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-18 20:19:00,884 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2022-11-18 20:19:00,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:00,884 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-18 20:19:00,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:19:00,885 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-18 20:19:00,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-18 20:19:00,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:00,886 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:00,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:01,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:01,093 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2022-11-18 20:19:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:01,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917009747] [2022-11-18 20:19:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:01,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:01,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:19:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:01,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:19:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:01,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:19:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:19:01,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:01,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917009747] [2022-11-18 20:19:01,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917009747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:01,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071980025] [2022-11-18 20:19:01,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:01,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:01,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:01,747 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:01,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:19:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:01,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:19:01,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:02,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:19:02,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:19:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:19:02,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:02,272 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:19:02,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2022-11-18 20:19:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:19:02,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071980025] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:19:02,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:19:02,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-11-18 20:19:02,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339644673] [2022-11-18 20:19:02,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:02,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:19:02,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:02,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:19:02,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:19:02,326 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:19:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:02,664 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2022-11-18 20:19:02,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:19:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-11-18 20:19:02,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:02,668 INFO L225 Difference]: With dead ends: 68 [2022-11-18 20:19:02,669 INFO L226 Difference]: Without dead ends: 64 [2022-11-18 20:19:02,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:19:02,670 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:02,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 208 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 266 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-11-18 20:19:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-18 20:19:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2022-11-18 20:19:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:19:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-18 20:19:02,693 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2022-11-18 20:19:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:02,694 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-18 20:19:02,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:19:02,695 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-18 20:19:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-18 20:19:02,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:02,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:02,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:02,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:02,904 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2022-11-18 20:19:02,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:02,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113228306] [2022-11-18 20:19:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:02,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:02,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:19:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:02,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:19:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:02,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:19:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:02,996 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:19:02,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:02,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113228306] [2022-11-18 20:19:02,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113228306] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:02,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086414216] [2022-11-18 20:19:02,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:19:02,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:02,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:02,998 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:03,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:19:03,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:19:03,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:03,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:19:03,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:19:03,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:03,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-18 20:19:03,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086414216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:19:03,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:19:03,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-18 20:19:03,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971161235] [2022-11-18 20:19:03,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:03,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:19:03,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:03,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:19:03,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:19:03,228 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:19:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:03,398 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2022-11-18 20:19:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:19:03,399 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-11-18 20:19:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:03,407 INFO L225 Difference]: With dead ends: 88 [2022-11-18 20:19:03,407 INFO L226 Difference]: Without dead ends: 69 [2022-11-18 20:19:03,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:19:03,411 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:03,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 100 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:19:03,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-18 20:19:03,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-11-18 20:19:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:19:03,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-11-18 20:19:03,424 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2022-11-18 20:19:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:03,424 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-11-18 20:19:03,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-18 20:19:03,425 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-11-18 20:19:03,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 20:19:03,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:03,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:03,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:03,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:03,632 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:03,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:03,632 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2022-11-18 20:19:03,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:03,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557785625] [2022-11-18 20:19:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:03,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:03,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:19:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:03,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:19:03,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:03,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:19:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:03,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:19:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:19:03,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557785625] [2022-11-18 20:19:03,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557785625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:03,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611555968] [2022-11-18 20:19:03,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:19:03,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:03,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:03,739 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:03,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:19:03,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:19:03,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:03,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:19:03,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:19:03,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-18 20:19:03,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611555968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:19:03,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:19:03,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-11-18 20:19:03,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516610731] [2022-11-18 20:19:03,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:03,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:19:03,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:03,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:19:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:19:03,966 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-18 20:19:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:04,139 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-11-18 20:19:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:19:04,147 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2022-11-18 20:19:04,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:04,148 INFO L225 Difference]: With dead ends: 59 [2022-11-18 20:19:04,149 INFO L226 Difference]: Without dead ends: 51 [2022-11-18 20:19:04,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:19:04,150 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:04,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 119 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:19:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-18 20:19:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-11-18 20:19:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 20:19:04,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-11-18 20:19:04,158 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2022-11-18 20:19:04,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:04,158 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-11-18 20:19:04,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-18 20:19:04,158 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-11-18 20:19:04,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 20:19:04,159 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:04,160 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:04,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:04,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:19:04,365 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:04,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2022-11-18 20:19:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:04,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020565679] [2022-11-18 20:19:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:04,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:06,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:19:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:06,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:19:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:06,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:19:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:06,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:19:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:19:06,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:06,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020565679] [2022-11-18 20:19:06,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020565679] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:06,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637515805] [2022-11-18 20:19:06,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:19:06,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:06,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:06,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:06,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:19:06,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:19:06,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:06,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:19:06,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:06,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:19:06,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:06,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:06,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:19:06,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-11-18 20:19:07,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:07,157 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 44 treesize of output 41 [2022-11-18 20:19:07,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2022-11-18 20:19:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:19:07,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:09,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637515805] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:09,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:19:09,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2022-11-18 20:19:09,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64596971] [2022-11-18 20:19:09,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:09,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:19:09,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:09,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:19:09,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:19:09,108 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:19:12,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:12,057 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2022-11-18 20:19:12,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:19:12,058 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-11-18 20:19:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:12,059 INFO L225 Difference]: With dead ends: 95 [2022-11-18 20:19:12,059 INFO L226 Difference]: Without dead ends: 91 [2022-11-18 20:19:12,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=580, Invalid=4390, Unknown=0, NotChecked=0, Total=4970 [2022-11-18 20:19:12,062 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 105 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:12,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 317 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 887 Invalid, 0 Unknown, 67 Unchecked, 0.9s Time] [2022-11-18 20:19:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-18 20:19:12,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2022-11-18 20:19:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:19:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-11-18 20:19:12,083 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 50 [2022-11-18 20:19:12,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:12,083 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-11-18 20:19:12,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:19:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-11-18 20:19:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 20:19:12,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:12,085 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:12,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 20:19:12,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:19:12,286 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:12,286 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2022-11-18 20:19:12,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:12,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627667090] [2022-11-18 20:19:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:12,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:13,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:19:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:13,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:19:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:13,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:19:13,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:13,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:19:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:19:13,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:13,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627667090] [2022-11-18 20:19:13,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627667090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:13,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436005775] [2022-11-18 20:19:13,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:13,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:13,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:13,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:13,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:19:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:13,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 20:19:13,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:14,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:19:14,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:14,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:14,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:19:14,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-11-18 20:19:14,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:14,706 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 51 treesize of output 44 [2022-11-18 20:19:15,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-11-18 20:19:15,173 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:19:15,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:16,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436005775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:16,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:19:16,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2022-11-18 20:19:16,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809403949] [2022-11-18 20:19:16,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:16,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:19:16,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:16,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:19:16,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:19:16,763 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:19:18,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:18,516 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2022-11-18 20:19:18,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:19:18,517 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-11-18 20:19:18,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:18,518 INFO L225 Difference]: With dead ends: 93 [2022-11-18 20:19:18,518 INFO L226 Difference]: Without dead ends: 89 [2022-11-18 20:19:18,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=450, Invalid=3210, Unknown=0, NotChecked=0, Total=3660 [2022-11-18 20:19:18,520 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:18,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 264 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 735 Invalid, 0 Unknown, 166 Unchecked, 0.6s Time] [2022-11-18 20:19:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-18 20:19:18,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2022-11-18 20:19:18,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:19:18,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-11-18 20:19:18,548 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 50 [2022-11-18 20:19:18,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:18,548 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-11-18 20:19:18,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:19:18,549 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-11-18 20:19:18,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 20:19:18,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:18,556 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:18,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:18,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:18,763 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:18,764 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2022-11-18 20:19:18,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:18,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026626515] [2022-11-18 20:19:18,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:18,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:20,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:19:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:20,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:19:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:20,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:19:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:20,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:19:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:19:20,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:20,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026626515] [2022-11-18 20:19:20,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026626515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:20,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891940607] [2022-11-18 20:19:20,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:19:20,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:20,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:20,363 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:20,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:19:20,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:19:20,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:20,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 20:19:20,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:20,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:19:21,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:21,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:21,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:19:21,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-11-18 20:19:21,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:21,791 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 44 treesize of output 41 [2022-11-18 20:19:22,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2022-11-18 20:19:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:19:22,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:26,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891940607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:26,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:19:26,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2022-11-18 20:19:26,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508843997] [2022-11-18 20:19:26,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:26,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:19:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:19:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2697, Unknown=1, NotChecked=0, Total=2970 [2022-11-18 20:19:26,688 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:19:29,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:29,461 INFO L93 Difference]: Finished difference Result 128 states and 167 transitions. [2022-11-18 20:19:29,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:19:29,461 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-11-18 20:19:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:29,462 INFO L225 Difference]: With dead ends: 128 [2022-11-18 20:19:29,463 INFO L226 Difference]: Without dead ends: 124 [2022-11-18 20:19:29,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=662, Invalid=5343, Unknown=1, NotChecked=0, Total=6006 [2022-11-18 20:19:29,465 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 150 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:29,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 227 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 884 Invalid, 0 Unknown, 119 Unchecked, 0.8s Time] [2022-11-18 20:19:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-18 20:19:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 72. [2022-11-18 20:19:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:19:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-11-18 20:19:29,482 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 50 [2022-11-18 20:19:29,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:29,482 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-11-18 20:19:29,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:19:29,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-11-18 20:19:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-18 20:19:29,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:29,484 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:29,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:29,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:29,690 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:29,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2022-11-18 20:19:29,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:29,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255671644] [2022-11-18 20:19:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:29,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:31,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:19:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:31,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:19:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:31,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:19:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:31,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:19:31,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:19:31,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:31,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255671644] [2022-11-18 20:19:31,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255671644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651776999] [2022-11-18 20:19:31,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:19:31,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:31,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:31,131 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:31,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:19:31,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:19:31,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:31,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:19:31,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:31,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:19:31,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:31,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:31,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:19:31,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-11-18 20:19:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:31,947 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 51 treesize of output 44 [2022-11-18 20:19:32,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-11-18 20:19:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:19:32,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:37,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651776999] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:37,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:19:37,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2022-11-18 20:19:37,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304065318] [2022-11-18 20:19:37,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:37,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-18 20:19:37,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:37,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-18 20:19:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2048, Unknown=1, NotChecked=0, Total=2256 [2022-11-18 20:19:37,917 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:19:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:40,552 INFO L93 Difference]: Finished difference Result 146 states and 188 transitions. [2022-11-18 20:19:40,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:19:40,552 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-11-18 20:19:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:40,554 INFO L225 Difference]: With dead ends: 146 [2022-11-18 20:19:40,554 INFO L226 Difference]: Without dead ends: 142 [2022-11-18 20:19:40,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=565, Invalid=4264, Unknown=1, NotChecked=0, Total=4830 [2022-11-18 20:19:40,557 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:40,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 361 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 955 Invalid, 0 Unknown, 323 Unchecked, 0.8s Time] [2022-11-18 20:19:40,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-11-18 20:19:40,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 72. [2022-11-18 20:19:40,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:19:40,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-11-18 20:19:40,574 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 50 [2022-11-18 20:19:40,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:40,575 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-11-18 20:19:40,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:19:40,575 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-11-18 20:19:40,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-18 20:19:40,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:40,576 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:40,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:40,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:19:40,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:40,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:40,783 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2022-11-18 20:19:40,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:40,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766755823] [2022-11-18 20:19:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:40,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:40,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:19:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:40,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:19:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:40,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:19:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:40,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:19:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:19:40,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:40,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766755823] [2022-11-18 20:19:40,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766755823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:40,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552998839] [2022-11-18 20:19:40,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:19:40,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:40,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:40,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:40,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:19:41,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:19:41,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:41,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:19:41,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:19:41,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:19:41,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552998839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:19:41,206 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:19:41,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-18 20:19:41,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615296716] [2022-11-18 20:19:41,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:41,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:19:41,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:41,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:19:41,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:19:41,208 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-18 20:19:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:41,419 INFO L93 Difference]: Finished difference Result 127 states and 157 transitions. [2022-11-18 20:19:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:19:41,420 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2022-11-18 20:19:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:41,421 INFO L225 Difference]: With dead ends: 127 [2022-11-18 20:19:41,421 INFO L226 Difference]: Without dead ends: 91 [2022-11-18 20:19:41,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:19:41,422 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:41,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 117 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:19:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-18 20:19:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2022-11-18 20:19:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:19:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2022-11-18 20:19:41,438 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 52 [2022-11-18 20:19:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:41,438 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2022-11-18 20:19:41,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-18 20:19:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2022-11-18 20:19:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-18 20:19:41,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:41,440 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:41,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:41,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:41,651 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:41,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2022-11-18 20:19:41,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:41,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175316486] [2022-11-18 20:19:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:41,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:19:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:41,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:19:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:41,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:19:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:41,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:19:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:41,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:19:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-18 20:19:41,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:41,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175316486] [2022-11-18 20:19:41,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175316486] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:41,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835149796] [2022-11-18 20:19:41,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:19:41,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:41,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:41,830 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:41,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:19:41,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-18 20:19:41,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:41,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:19:41,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:42,032 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-18 20:19:42,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-18 20:19:42,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835149796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:19:42,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:19:42,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-18 20:19:42,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50071406] [2022-11-18 20:19:42,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:42,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:19:42,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:42,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:19:42,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:19:42,157 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:19:42,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:19:42,381 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2022-11-18 20:19:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:19:42,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2022-11-18 20:19:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:19:42,382 INFO L225 Difference]: With dead ends: 73 [2022-11-18 20:19:42,382 INFO L226 Difference]: Without dead ends: 63 [2022-11-18 20:19:42,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:19:42,383 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 86 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:19:42,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 122 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:19:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-18 20:19:42,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-11-18 20:19:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:19:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-11-18 20:19:42,394 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2022-11-18 20:19:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:19:42,395 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-11-18 20:19:42,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:19:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-11-18 20:19:42,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:19:42,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:19:42,396 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:42,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:42,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:19:42,599 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:19:42,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2022-11-18 20:19:42,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:42,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975555442] [2022-11-18 20:19:42,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:42,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:45,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:19:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:45,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:19:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:45,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:19:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:45,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:19:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:45,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:19:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:19:45,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:45,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975555442] [2022-11-18 20:19:45,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975555442] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:45,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360649665] [2022-11-18 20:19:45,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:19:45,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:45,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:45,313 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:45,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:19:45,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:45,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-18 20:19:45,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:45,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:19:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:46,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:46,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:46,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:46,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:19:46,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2022-11-18 20:19:46,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:19:46,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:46,867 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 79 [2022-11-18 20:19:47,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:47,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:19:47,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2022-11-18 20:19:48,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-11-18 20:19:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:19:48,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:53,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360649665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:53,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:19:53,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2022-11-18 20:19:53,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602348411] [2022-11-18 20:19:53,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:53,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 20:19:53,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:53,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 20:19:53,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3971, Unknown=1, NotChecked=0, Total=4290 [2022-11-18 20:19:53,014 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:20:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:20:00,032 INFO L93 Difference]: Finished difference Result 179 states and 231 transitions. [2022-11-18 20:20:00,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-11-18 20:20:00,034 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-11-18 20:20:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:20:00,036 INFO L225 Difference]: With dead ends: 179 [2022-11-18 20:20:00,037 INFO L226 Difference]: Without dead ends: 173 [2022-11-18 20:20:00,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=1021, Invalid=11860, Unknown=1, NotChecked=0, Total=12882 [2022-11-18 20:20:00,040 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 199 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:20:00,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 485 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1095 Invalid, 0 Unknown, 256 Unchecked, 1.1s Time] [2022-11-18 20:20:00,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-18 20:20:00,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 94. [2022-11-18 20:20:00,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 81 states have (on average 1.2839506172839505) internal successors, (104), 81 states have internal predecessors, (104), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 20:20:00,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2022-11-18 20:20:00,065 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 64 [2022-11-18 20:20:00,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:20:00,066 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2022-11-18 20:20:00,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:20:00,066 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2022-11-18 20:20:00,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:20:00,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:20:00,067 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:00,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:00,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:20:00,268 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:20:00,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:00,268 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2022-11-18 20:20:00,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:00,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261951244] [2022-11-18 20:20:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:00,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:20:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:02,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:20:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:02,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:20:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:02,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:20:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:02,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:20:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:20:02,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:02,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261951244] [2022-11-18 20:20:02,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261951244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:02,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209509797] [2022-11-18 20:20:02,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:20:02,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:02,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:02,707 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:02,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:20:02,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:20:02,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:02,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:20:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:02,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:20:04,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:20:04,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 59 [2022-11-18 20:20:04,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2022-11-18 20:20:04,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:04,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:05,015 INFO L321 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2022-11-18 20:20:05,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 127 treesize of output 105 [2022-11-18 20:20:06,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:06,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:06,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:06,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:20:06,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:20:06,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 72 [2022-11-18 20:20:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:20:07,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:24,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209509797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:24,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:20:24,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 56 [2022-11-18 20:20:24,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194874796] [2022-11-18 20:20:24,898 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:24,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-18 20:20:24,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:24,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-18 20:20:24,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4946, Unknown=6, NotChecked=0, Total=5402 [2022-11-18 20:20:24,901 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:20:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:20:31,418 INFO L93 Difference]: Finished difference Result 198 states and 250 transitions. [2022-11-18 20:20:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:20:31,419 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-11-18 20:20:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:20:31,420 INFO L225 Difference]: With dead ends: 198 [2022-11-18 20:20:31,420 INFO L226 Difference]: Without dead ends: 194 [2022-11-18 20:20:31,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3761 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=1065, Invalid=11811, Unknown=6, NotChecked=0, Total=12882 [2022-11-18 20:20:31,424 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 125 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:20:31,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 512 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1388 Invalid, 0 Unknown, 420 Unchecked, 1.3s Time] [2022-11-18 20:20:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-11-18 20:20:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 114. [2022-11-18 20:20:31,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 99 states have internal predecessors, (127), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:20:31,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 149 transitions. [2022-11-18 20:20:31,460 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 149 transitions. Word has length 64 [2022-11-18 20:20:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:20:31,460 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 149 transitions. [2022-11-18 20:20:31,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:20:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 149 transitions. [2022-11-18 20:20:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:20:31,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:20:31,462 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:31,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 20:20:31,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:20:31,672 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:20:31,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:31,673 INFO L85 PathProgramCache]: Analyzing trace with hash -230931721, now seen corresponding path program 4 times [2022-11-18 20:20:31,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:31,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253926579] [2022-11-18 20:20:31,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:31,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:33,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:20:33,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:33,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:20:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:33,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:20:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:33,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:20:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:33,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:20:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:20:33,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:33,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253926579] [2022-11-18 20:20:33,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253926579] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:33,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301391351] [2022-11-18 20:20:33,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:20:33,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:34,012 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:34,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:20:34,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:20:34,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 20:20:34,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:34,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:20:35,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:35,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:35,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:35,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:35,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:20:35,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2022-11-18 20:20:35,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:20:35,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:35,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:35,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:35,511 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2022-11-18 20:20:35,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:35,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:35,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2022-11-18 20:20:36,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-11-18 20:20:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:20:36,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:39,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301391351] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:39,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:20:39,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 52 [2022-11-18 20:20:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019440454] [2022-11-18 20:20:39,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:39,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-18 20:20:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-18 20:20:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=4109, Unknown=0, NotChecked=0, Total=4556 [2022-11-18 20:20:39,849 INFO L87 Difference]: Start difference. First operand 114 states and 149 transitions. Second operand has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:20:43,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:20:43,847 INFO L93 Difference]: Finished difference Result 158 states and 202 transitions. [2022-11-18 20:20:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:20:43,848 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-11-18 20:20:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:20:43,848 INFO L225 Difference]: With dead ends: 158 [2022-11-18 20:20:43,848 INFO L226 Difference]: Without dead ends: 154 [2022-11-18 20:20:43,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2504 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=831, Invalid=7001, Unknown=0, NotChecked=0, Total=7832 [2022-11-18 20:20:43,851 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 107 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:20:43,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 360 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1444 Invalid, 0 Unknown, 324 Unchecked, 1.4s Time] [2022-11-18 20:20:43,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-18 20:20:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 128. [2022-11-18 20:20:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 112 states have internal predecessors, (143), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 20:20:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 167 transitions. [2022-11-18 20:20:43,895 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 167 transitions. Word has length 64 [2022-11-18 20:20:43,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:20:43,896 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 167 transitions. [2022-11-18 20:20:43,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:20:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 167 transitions. [2022-11-18 20:20:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:20:43,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:20:43,897 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:43,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:44,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:44,103 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:20:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:44,103 INFO L85 PathProgramCache]: Analyzing trace with hash -12077003, now seen corresponding path program 5 times [2022-11-18 20:20:44,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:44,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159777661] [2022-11-18 20:20:44,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:44,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:46,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:20:46,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:46,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:20:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:46,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:20:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:46,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:20:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:46,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:20:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:20:46,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:46,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159777661] [2022-11-18 20:20:46,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159777661] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:46,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405568857] [2022-11-18 20:20:46,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:20:46,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:46,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:46,703 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:46,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:20:46,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 20:20:46,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:46,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-18 20:20:46,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:46,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 20:20:47,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:47,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:47,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:47,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:47,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:20:47,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2022-11-18 20:20:48,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:20:48,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:48,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:48,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:48,167 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2022-11-18 20:20:48,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:48,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:20:48,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2022-11-18 20:20:49,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2022-11-18 20:20:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:20:49,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:53,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405568857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:53,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:20:53,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2022-11-18 20:20:53,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522038535] [2022-11-18 20:20:53,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:53,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:20:53,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:53,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:20:53,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=3744, Unknown=1, NotChecked=0, Total=4032 [2022-11-18 20:20:53,848 INFO L87 Difference]: Start difference. First operand 128 states and 167 transitions. Second operand has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:20:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:20:59,622 INFO L93 Difference]: Finished difference Result 184 states and 234 transitions. [2022-11-18 20:20:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-18 20:20:59,623 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-11-18 20:20:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:20:59,625 INFO L225 Difference]: With dead ends: 184 [2022-11-18 20:20:59,625 INFO L226 Difference]: Without dead ends: 180 [2022-11-18 20:20:59,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2445 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=834, Invalid=8285, Unknown=1, NotChecked=0, Total=9120 [2022-11-18 20:20:59,627 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 91 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:20:59,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 471 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1607 Invalid, 0 Unknown, 182 Unchecked, 1.5s Time] [2022-11-18 20:20:59,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-18 20:20:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 130. [2022-11-18 20:20:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 114 states have (on average 1.280701754385965) internal successors, (146), 114 states have internal predecessors, (146), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 20:20:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 170 transitions. [2022-11-18 20:20:59,675 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 170 transitions. Word has length 64 [2022-11-18 20:20:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:20:59,676 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 170 transitions. [2022-11-18 20:20:59,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:20:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 170 transitions. [2022-11-18 20:20:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:20:59,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:20:59,677 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:59,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:59,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:20:59,884 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:20:59,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash -257544841, now seen corresponding path program 6 times [2022-11-18 20:20:59,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:59,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397559748] [2022-11-18 20:20:59,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:59,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:02,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:21:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:02,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:21:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:02,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:21:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:02,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:21:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:02,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:21:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:21:02,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:02,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397559748] [2022-11-18 20:21:02,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397559748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:02,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337770971] [2022-11-18 20:21:02,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:21:02,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:02,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:02,460 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:02,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:21:02,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-18 20:21:02,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:02,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 20:21:02,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:02,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:21:11,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:21:11,495 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2022-11-18 20:21:11,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 64 [2022-11-18 20:21:11,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:11,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:11,806 INFO L321 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2022-11-18 20:21:11,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 83 [2022-11-18 20:21:12,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:12,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:12,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:12,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:12,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:12,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:12,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:12,159 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-18 20:21:12,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 96 [2022-11-18 20:21:13,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:13,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:21:13,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:13,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:21:13,650 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:21:13,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 85 [2022-11-18 20:21:14,140 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:21:14,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:20,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337770971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:20,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:21:20,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34] total 60 [2022-11-18 20:21:20,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170684567] [2022-11-18 20:21:20,148 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:20,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-18 20:21:20,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:20,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-18 20:21:20,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=5618, Unknown=5, NotChecked=0, Total=6320 [2022-11-18 20:21:20,150 INFO L87 Difference]: Start difference. First operand 130 states and 170 transitions. Second operand has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:21:50,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:21:50,152 INFO L93 Difference]: Finished difference Result 258 states and 345 transitions. [2022-11-18 20:21:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-18 20:21:50,153 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-11-18 20:21:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:21:50,155 INFO L225 Difference]: With dead ends: 258 [2022-11-18 20:21:50,155 INFO L226 Difference]: Without dead ends: 254 [2022-11-18 20:21:50,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4286 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=1440, Invalid=12349, Unknown=17, NotChecked=0, Total=13806 [2022-11-18 20:21:50,158 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 122 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 489 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:21:50,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 422 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 857 Invalid, 0 Unknown, 489 Unchecked, 0.8s Time] [2022-11-18 20:21:50,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-18 20:21:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 186. [2022-11-18 20:21:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 161 states have (on average 1.3540372670807452) internal successors, (218), 161 states have internal predecessors, (218), 20 states have call successors, (20), 4 states have call predecessors, (20), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-18 20:21:50,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 258 transitions. [2022-11-18 20:21:50,221 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 258 transitions. Word has length 64 [2022-11-18 20:21:50,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:21:50,222 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 258 transitions. [2022-11-18 20:21:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:21:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 258 transitions. [2022-11-18 20:21:50,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:21:50,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:21:50,224 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:50,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:50,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:21:50,430 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:21:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:50,430 INFO L85 PathProgramCache]: Analyzing trace with hash -38690123, now seen corresponding path program 7 times [2022-11-18 20:21:50,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:50,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927617667] [2022-11-18 20:21:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:50,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:52,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:21:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:52,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:21:52,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:52,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:21:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:52,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:21:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:52,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:21:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:21:52,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927617667] [2022-11-18 20:21:52,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927617667] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:52,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648150958] [2022-11-18 20:21:52,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:21:52,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:52,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:52,795 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:52,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:21:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:52,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 20:21:52,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:52,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:21:54,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:54,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:54,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:21:54,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2022-11-18 20:21:54,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:21:54,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:54,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:54,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:54,434 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2022-11-18 20:21:54,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:54,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:21:54,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 75 [2022-11-18 20:21:55,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 39 [2022-11-18 20:21:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:21:55,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:22:01,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648150958] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:01,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:22:01,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2022-11-18 20:22:01,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072950784] [2022-11-18 20:22:01,839 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:22:01,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-18 20:22:01,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:22:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-18 20:22:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=4106, Unknown=1, NotChecked=0, Total=4422 [2022-11-18 20:22:01,841 INFO L87 Difference]: Start difference. First operand 186 states and 258 transitions. Second operand has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:22:05,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:22:05,437 INFO L93 Difference]: Finished difference Result 237 states and 319 transitions. [2022-11-18 20:22:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:22:05,438 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-11-18 20:22:05,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:22:05,439 INFO L225 Difference]: With dead ends: 237 [2022-11-18 20:22:05,439 INFO L226 Difference]: Without dead ends: 233 [2022-11-18 20:22:05,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=623, Invalid=6686, Unknown=1, NotChecked=0, Total=7310 [2022-11-18 20:22:05,441 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 82 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:22:05,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 544 Invalid, 1686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1399 Invalid, 0 Unknown, 237 Unchecked, 1.3s Time] [2022-11-18 20:22:05,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-18 20:22:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 196. [2022-11-18 20:22:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 169 states have (on average 1.3550295857988166) internal successors, (229), 169 states have internal predecessors, (229), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-18 20:22:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 271 transitions. [2022-11-18 20:22:05,495 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 271 transitions. Word has length 64 [2022-11-18 20:22:05,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:22:05,496 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 271 transitions. [2022-11-18 20:22:05,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:22:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 271 transitions. [2022-11-18 20:22:05,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:22:05,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:22:05,497 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:22:05,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:22:05,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:22:05,697 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:22:05,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:22:05,698 INFO L85 PathProgramCache]: Analyzing trace with hash 17214773, now seen corresponding path program 8 times [2022-11-18 20:22:05,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:22:05,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792464270] [2022-11-18 20:22:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:22:05,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:22:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:07,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:22:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:07,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:22:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:07,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:22:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:07,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:22:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:07,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:22:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:22:07,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:22:07,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792464270] [2022-11-18 20:22:07,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792464270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:07,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157875744] [2022-11-18 20:22:07,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:22:07,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:07,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:22:07,970 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:22:07,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:22:08,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:22:08,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:22:08,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 20:22:08,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:22:08,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:22:09,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:09,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:09,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:09,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:09,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:22:09,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2022-11-18 20:22:09,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:22:09,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:09,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:09,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:09,991 INFO L350 Elim1Store]: Elim1 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 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2022-11-18 20:22:10,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:10,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:10,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2022-11-18 20:22:11,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2022-11-18 20:22:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:22:11,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:22:20,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157875744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:20,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:22:20,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 57 [2022-11-18 20:22:20,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936200763] [2022-11-18 20:22:20,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:22:20,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-18 20:22:20,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:22:20,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-18 20:22:20,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=4883, Unknown=3, NotChecked=0, Total=5256 [2022-11-18 20:22:20,432 INFO L87 Difference]: Start difference. First operand 196 states and 271 transitions. Second operand has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:22:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:22:29,476 INFO L93 Difference]: Finished difference Result 314 states and 421 transitions. [2022-11-18 20:22:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 20:22:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-11-18 20:22:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:22:29,479 INFO L225 Difference]: With dead ends: 314 [2022-11-18 20:22:29,479 INFO L226 Difference]: Without dead ends: 310 [2022-11-18 20:22:29,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3562 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=1241, Invalid=13036, Unknown=3, NotChecked=0, Total=14280 [2022-11-18 20:22:29,481 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 143 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 2016 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:22:29,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 446 Invalid, 2290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2016 Invalid, 0 Unknown, 165 Unchecked, 2.1s Time] [2022-11-18 20:22:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-18 20:22:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 214. [2022-11-18 20:22:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 184 states have (on average 1.375) internal successors, (253), 184 states have internal predecessors, (253), 24 states have call successors, (24), 5 states have call predecessors, (24), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-18 20:22:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 301 transitions. [2022-11-18 20:22:29,573 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 301 transitions. Word has length 64 [2022-11-18 20:22:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:22:29,573 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 301 transitions. [2022-11-18 20:22:29,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:22:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 301 transitions. [2022-11-18 20:22:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:22:29,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:22:29,575 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:22:29,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:22:29,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:29,781 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:22:29,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:22:29,781 INFO L85 PathProgramCache]: Analyzing trace with hash 236069491, now seen corresponding path program 3 times [2022-11-18 20:22:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:22:29,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459451864] [2022-11-18 20:22:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:22:29,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:22:29,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:32,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:22:32,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:32,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:22:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:32,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:22:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:32,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:22:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:32,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:22:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:22:32,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:22:32,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459451864] [2022-11-18 20:22:32,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459451864] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:32,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888984398] [2022-11-18 20:22:32,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:22:32,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:32,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:22:32,255 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:22:32,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:22:32,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:22:32,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:22:32,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-18 20:22:32,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:22:32,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:22:33,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:33,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:33,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:33,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:33,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:33,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:22:33,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 57 [2022-11-18 20:22:34,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:34,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:34,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:34,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:34,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2022-11-18 20:22:34,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:34,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:34,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:34,363 INFO L321 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2022-11-18 20:22:34,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 113 [2022-11-18 20:22:36,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:36,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:22:36,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:22:36,395 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:22:36,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 80 [2022-11-18 20:22:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-18 20:22:36,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:22:51,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888984398] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:51,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:22:51,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2022-11-18 20:22:51,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018246692] [2022-11-18 20:22:51,291 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:22:51,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-18 20:22:51,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:22:51,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-18 20:22:51,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=4794, Unknown=4, NotChecked=0, Total=5256 [2022-11-18 20:22:51,293 INFO L87 Difference]: Start difference. First operand 214 states and 301 transitions. Second operand has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:22:57,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:22:57,776 INFO L93 Difference]: Finished difference Result 290 states and 386 transitions. [2022-11-18 20:22:57,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 20:22:57,777 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-11-18 20:22:57,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:22:57,778 INFO L225 Difference]: With dead ends: 290 [2022-11-18 20:22:57,778 INFO L226 Difference]: Without dead ends: 286 [2022-11-18 20:22:57,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3636 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=1145, Invalid=10841, Unknown=4, NotChecked=0, Total=11990 [2022-11-18 20:22:57,780 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 79 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 652 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:22:57,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 950 Invalid, 0 Unknown, 652 Unchecked, 0.9s Time] [2022-11-18 20:22:57,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-18 20:22:57,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 208. [2022-11-18 20:22:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 179 states have (on average 1.3687150837988826) internal successors, (245), 179 states have internal predecessors, (245), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-18 20:22:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 291 transitions. [2022-11-18 20:22:57,857 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 291 transitions. Word has length 64 [2022-11-18 20:22:57,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:22:57,857 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 291 transitions. [2022-11-18 20:22:57,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:22:57,858 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 291 transitions. [2022-11-18 20:22:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-18 20:22:57,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:22:57,859 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:22:57,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:22:58,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:58,065 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:22:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:22:58,066 INFO L85 PathProgramCache]: Analyzing trace with hash -584834725, now seen corresponding path program 8 times [2022-11-18 20:22:58,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:22:58,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421735574] [2022-11-18 20:22:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:22:58,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:22:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:58,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:22:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:58,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:22:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:58,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:22:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:58,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:22:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:58,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:22:58,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 20:22:58,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:22:58,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421735574] [2022-11-18 20:22:58,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421735574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:58,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75856182] [2022-11-18 20:22:58,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:22:58,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:22:58,239 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:22:58,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:22:58,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:22:58,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:22:58,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:22:58,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:22:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 20:22:58,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:22:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-11-18 20:22:58,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75856182] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:22:58,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:22:58,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-18 20:22:58,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637118977] [2022-11-18 20:22:58,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:22:58,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:22:58,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:22:58,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:22:58,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:22:58,668 INFO L87 Difference]: Start difference. First operand 208 states and 291 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:22:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:22:59,072 INFO L93 Difference]: Finished difference Result 300 states and 406 transitions. [2022-11-18 20:22:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:22:59,073 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2022-11-18 20:22:59,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:22:59,074 INFO L225 Difference]: With dead ends: 300 [2022-11-18 20:22:59,075 INFO L226 Difference]: Without dead ends: 246 [2022-11-18 20:22:59,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:22:59,076 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 112 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:22:59,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 96 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:22:59,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-18 20:22:59,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 199. [2022-11-18 20:22:59,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 170 states have (on average 1.3470588235294119) internal successors, (229), 170 states have internal predecessors, (229), 23 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-18 20:22:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 275 transitions. [2022-11-18 20:22:59,178 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 275 transitions. Word has length 66 [2022-11-18 20:22:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:22:59,178 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 275 transitions. [2022-11-18 20:22:59,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-18 20:22:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 275 transitions. [2022-11-18 20:22:59,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 20:22:59,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:22:59,180 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:22:59,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:22:59,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 20:22:59,387 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:22:59,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:22:59,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1107280848, now seen corresponding path program 9 times [2022-11-18 20:22:59,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:22:59,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433340680] [2022-11-18 20:22:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:22:59,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:22:59,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:59,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:22:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:59,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:22:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:59,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:22:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:59,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:22:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:59,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:22:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:59,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 20:22:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:59,577 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 20:22:59,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:22:59,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433340680] [2022-11-18 20:22:59,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433340680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:59,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056579210] [2022-11-18 20:22:59,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:22:59,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:59,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:22:59,579 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:22:59,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:22:59,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:22:59,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:22:59,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:22:59,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:22:59,890 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 20:22:59,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:23:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 20:23:00,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056579210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:23:00,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:23:00,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-18 20:23:00,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176957449] [2022-11-18 20:23:00,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:23:00,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:23:00,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:00,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:23:00,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:23:00,074 INFO L87 Difference]: Start difference. First operand 199 states and 275 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-18 20:23:00,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:23:00,469 INFO L93 Difference]: Finished difference Result 207 states and 283 transitions. [2022-11-18 20:23:00,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:23:00,472 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 74 [2022-11-18 20:23:00,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:23:00,474 INFO L225 Difference]: With dead ends: 207 [2022-11-18 20:23:00,474 INFO L226 Difference]: Without dead ends: 195 [2022-11-18 20:23:00,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:23:00,475 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 83 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:23:00,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 134 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:23:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-11-18 20:23:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 127. [2022-11-18 20:23:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 107 states have (on average 1.2897196261682242) internal successors, (138), 107 states have internal predecessors, (138), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 20:23:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2022-11-18 20:23:00,534 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 74 [2022-11-18 20:23:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:23:00,534 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2022-11-18 20:23:00,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-18 20:23:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2022-11-18 20:23:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-18 20:23:00,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:23:00,536 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:00,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:23:00,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 20:23:00,742 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:23:00,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:00,742 INFO L85 PathProgramCache]: Analyzing trace with hash -517304264, now seen corresponding path program 9 times [2022-11-18 20:23:00,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:00,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168267447] [2022-11-18 20:23:00,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:00,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:00,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:04,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:23:04,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:04,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:23:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:04,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:23:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:04,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:23:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:04,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:23:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:04,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 20:23:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:23:04,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168267447] [2022-11-18 20:23:04,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168267447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:23:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698638772] [2022-11-18 20:23:04,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:23:04,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:23:04,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:23:04,806 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:23:04,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:23:04,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-18 20:23:04,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:23:04,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-18 20:23:04,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:23:04,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:23:48,036 INFO L321 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2022-11-18 20:23:48,037 INFO L350 Elim1Store]: Elim1 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 10 case distinctions, treesize of input 108 treesize of output 93 [2022-11-18 20:23:48,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:48,442 INFO L321 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2022-11-18 20:23:48,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 117 treesize of output 108 [2022-11-18 20:23:48,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:48,761 INFO L321 Elim1Store]: treesize reduction 184, result has 13.6 percent of original size [2022-11-18 20:23:48,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 138 treesize of output 147 [2022-11-18 20:23:49,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:49,379 INFO L321 Elim1Store]: treesize reduction 278, result has 9.4 percent of original size [2022-11-18 20:23:49,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 3 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 32 case distinctions, treesize of input 182 treesize of output 173 [2022-11-18 20:23:58,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:58,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:58,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:58,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:58,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:58,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:58,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:58,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:23:59,031 INFO L321 Elim1Store]: treesize reduction 192, result has 27.5 percent of original size [2022-11-18 20:23:59,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 13 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 31 case distinctions, treesize of input 197 treesize of output 117 [2022-11-18 20:23:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 78 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:23:59,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:24:37,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698638772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:24:37,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:24:37,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 42] total 74 [2022-11-18 20:24:37,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864034672] [2022-11-18 20:24:37,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:24:37,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-18 20:24:37,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:24:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-18 20:24:37,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=8330, Unknown=34, NotChecked=0, Total=9312 [2022-11-18 20:24:37,628 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 74 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 73 states have internal predecessors, (105), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:25:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:25:35,721 INFO L93 Difference]: Finished difference Result 247 states and 329 transitions. [2022-11-18 20:25:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-11-18 20:25:35,722 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 73 states have internal predecessors, (105), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 78 [2022-11-18 20:25:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:25:35,724 INFO L225 Difference]: With dead ends: 247 [2022-11-18 20:25:35,724 INFO L226 Difference]: Without dead ends: 243 [2022-11-18 20:25:35,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7227 ImplicationChecksByTransitivity, 146.8s TimeCoverageRelationStatistics Valid=2119, Invalid=19893, Unknown=40, NotChecked=0, Total=22052 [2022-11-18 20:25:35,726 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 173 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1702 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:25:35,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 742 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1605 Invalid, 0 Unknown, 1702 Unchecked, 1.8s Time] [2022-11-18 20:25:35,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-18 20:25:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 184. [2022-11-18 20:25:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 157 states have (on average 1.2993630573248407) internal successors, (204), 157 states have internal predecessors, (204), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-18 20:25:35,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 242 transitions. [2022-11-18 20:25:35,821 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 242 transitions. Word has length 78 [2022-11-18 20:25:35,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:25:35,821 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 242 transitions. [2022-11-18 20:25:35,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 73 states have internal predecessors, (105), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:25:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 242 transitions. [2022-11-18 20:25:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-18 20:25:35,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:25:35,823 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:25:35,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:25:36,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:36,029 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:25:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:25:36,029 INFO L85 PathProgramCache]: Analyzing trace with hash -455264650, now seen corresponding path program 10 times [2022-11-18 20:25:36,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:25:36,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261735992] [2022-11-18 20:25:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:25:36,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:25:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:40,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:25:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:40,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:25:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:40,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:25:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:40,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:25:40,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:40,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:25:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:40,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 20:25:40,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:25:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:25:40,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:25:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261735992] [2022-11-18 20:25:40,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261735992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:25:40,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77306702] [2022-11-18 20:25:40,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:25:40,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:25:40,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:25:40,473 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:25:40,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:25:40,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:25:40,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:25:40,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-18 20:25:40,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:25:40,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:25:42,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:42,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:42,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:42,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:42,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:42,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:42,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:25:42,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 71 [2022-11-18 20:25:43,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:25:43,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 91 [2022-11-18 20:25:43,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:25:43,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:43,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 95 [2022-11-18 20:25:44,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:44,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:25:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:44,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:44,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:44,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:44,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:44,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:44,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:25:44,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 120 [2022-11-18 20:25:46,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 55 [2022-11-18 20:25:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:25:46,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:26:09,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77306702] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:09,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:26:09,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 68 [2022-11-18 20:26:09,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286574038] [2022-11-18 20:26:09,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:26:09,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-18 20:26:09,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:26:09,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-18 20:26:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=6818, Unknown=7, NotChecked=0, Total=7310 [2022-11-18 20:26:09,685 INFO L87 Difference]: Start difference. First operand 184 states and 242 transitions. Second operand has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 68 states have internal predecessors, (103), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:26:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:26:19,245 INFO L93 Difference]: Finished difference Result 318 states and 427 transitions. [2022-11-18 20:26:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-18 20:26:19,251 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 68 states have internal predecessors, (103), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 78 [2022-11-18 20:26:19,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:26:19,257 INFO L225 Difference]: With dead ends: 318 [2022-11-18 20:26:19,257 INFO L226 Difference]: Without dead ends: 314 [2022-11-18 20:26:19,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 71 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4680 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=1040, Invalid=13473, Unknown=7, NotChecked=0, Total=14520 [2022-11-18 20:26:19,259 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 187 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1977 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1141 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:26:19,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 624 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1977 Invalid, 0 Unknown, 1141 Unchecked, 2.6s Time] [2022-11-18 20:26:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-18 20:26:19,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 214. [2022-11-18 20:26:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 183 states have (on average 1.3060109289617485) internal successors, (239), 183 states have internal predecessors, (239), 22 states have call successors, (22), 8 states have call predecessors, (22), 8 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-18 20:26:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 283 transitions. [2022-11-18 20:26:19,397 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 283 transitions. Word has length 78 [2022-11-18 20:26:19,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:26:19,398 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 283 transitions. [2022-11-18 20:26:19,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.5147058823529411) internal successors, (103), 68 states have internal predecessors, (103), 11 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:26:19,398 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 283 transitions. [2022-11-18 20:26:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-18 20:26:19,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:26:19,400 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:26:19,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:26:19,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:19,606 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:26:19,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:26:19,606 INFO L85 PathProgramCache]: Analyzing trace with hash -911671050, now seen corresponding path program 11 times [2022-11-18 20:26:19,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:26:19,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845472532] [2022-11-18 20:26:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:26:19,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:26:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:24,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:26:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:24,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:26:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:24,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:26:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:24,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:26:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:24,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:26:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:24,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 20:26:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:26:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:26:24,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:26:24,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845472532] [2022-11-18 20:26:24,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845472532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:26:24,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423184285] [2022-11-18 20:26:24,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:26:24,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:26:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:26:24,383 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:26:24,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:26:24,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-18 20:26:24,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:26:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-18 20:26:24,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:26:24,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-18 20:26:26,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:26,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:26,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:26,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:26,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:26,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:26,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:26:26,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 73 [2022-11-18 20:26:27,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:26:27,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:27,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:27,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 93 [2022-11-18 20:26:27,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:27,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:27,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:27,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:26:27,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:26:27,771 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:26:27,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 113 [2022-11-18 20:26:28,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:26:28,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 93 [2022-11-18 20:26:30,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:26:30,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 7 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 134 treesize of output 42 [2022-11-18 20:26:30,388 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 29 proven. 84 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:26:30,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:27:01,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423184285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:01,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:27:01,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 67 [2022-11-18 20:27:01,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199632439] [2022-11-18 20:27:01,997 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:27:01,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-11-18 20:27:01,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:27:01,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-11-18 20:27:01,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=6690, Unknown=9, NotChecked=0, Total=7140 [2022-11-18 20:27:01,999 INFO L87 Difference]: Start difference. First operand 214 states and 283 transitions. Second operand has 67 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 67 states have internal predecessors, (102), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:27:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:27:22,238 INFO L93 Difference]: Finished difference Result 373 states and 487 transitions. [2022-11-18 20:27:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-18 20:27:22,239 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 67 states have internal predecessors, (102), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 78 [2022-11-18 20:27:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:27:22,240 INFO L225 Difference]: With dead ends: 373 [2022-11-18 20:27:22,240 INFO L226 Difference]: Without dead ends: 367 [2022-11-18 20:27:22,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7727 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=1647, Invalid=22214, Unknown=9, NotChecked=0, Total=23870 [2022-11-18 20:27:22,242 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 228 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 501 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:27:22,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 458 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2151 Invalid, 0 Unknown, 501 Unchecked, 3.3s Time] [2022-11-18 20:27:22,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-18 20:27:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 268. [2022-11-18 20:27:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 228 states have (on average 1.355263157894737) internal successors, (309), 228 states have internal predecessors, (309), 30 states have call successors, (30), 9 states have call predecessors, (30), 9 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-18 20:27:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 369 transitions. [2022-11-18 20:27:22,403 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 369 transitions. Word has length 78 [2022-11-18 20:27:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:27:22,404 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 369 transitions. [2022-11-18 20:27:22,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 67 states have internal predecessors, (102), 11 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:27:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 369 transitions. [2022-11-18 20:27:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-18 20:27:22,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:27:22,406 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:27:22,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:27:22,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:27:22,612 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:27:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:27:22,612 INFO L85 PathProgramCache]: Analyzing trace with hash -849631436, now seen corresponding path program 12 times [2022-11-18 20:27:22,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:27:22,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790913288] [2022-11-18 20:27:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:27:22,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:27:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:28,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-18 20:27:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:28,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-18 20:27:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:28,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-18 20:27:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:28,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-18 20:27:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:28,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-11-18 20:27:28,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:28,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-18 20:27:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:27:28,105 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:27:28,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:27:28,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790913288] [2022-11-18 20:27:28,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790913288] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:27:28,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166118554] [2022-11-18 20:27:28,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:27:28,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:27:28,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:27:28,108 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:27:28,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ff2661-a799-4310-b01d-d678864943bd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:27:28,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 20:27:28,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:27:28,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 20:27:28,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:27:28,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-18 20:27:55,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:27:55,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:55,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:55,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:27:55,635 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-18 20:27:55,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 89 treesize of output 87 [2022-11-18 20:28:00,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:00,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:00,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:00,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:00,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:00,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:00,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:00,450 INFO L321 Elim1Store]: treesize reduction 70, result has 1.4 percent of original size [2022-11-18 20:28:00,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 102 treesize of output 106 [2022-11-18 20:28:05,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:05,352 INFO L321 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2022-11-18 20:28:05,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 18 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 115 treesize of output 125 [2022-11-18 20:28:07,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:07,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:07,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:07,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:07,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:07,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:07,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:07,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:07,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:08,048 INFO L321 Elim1Store]: treesize reduction 206, result has 17.6 percent of original size [2022-11-18 20:28:08,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 20 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 290 treesize of output 191 [2022-11-18 20:28:34,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:28:34,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:28:34,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:28:34,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:28:34,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 23 disjoint index pairs (out of 91 index pairs), introduced 12 new quantified variables, introduced 17 case distinctions, treesize of input 313 treesize of output 119 [2022-11-18 20:28:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 41 proven. 72 refuted. 4 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:28:35,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:29:11,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166118554] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:29:11,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:29:11,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 42] total 75 [2022-11-18 20:29:11,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711923889] [2022-11-18 20:29:11,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:29:11,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-18 20:29:11,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:29:11,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-18 20:29:11,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=917, Invalid=8752, Unknown=33, NotChecked=0, Total=9702 [2022-11-18 20:29:11,373 INFO L87 Difference]: Start difference. First operand 268 states and 369 transitions. Second operand has 75 states, 74 states have (on average 1.4864864864864864) internal successors, (110), 74 states have internal predecessors, (110), 12 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12)