./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8 --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 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 --- 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-e04fb08 [2022-11-16 10:58:48,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 10:58:48,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 10:58:48,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 10:58:48,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 10:58:48,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 10:58:48,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 10:58:48,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 10:58:48,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 10:58:48,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 10:58:48,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 10:58:48,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 10:58:48,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 10:58:48,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 10:58:48,240 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 10:58:48,242 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 10:58:48,244 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 10:58:48,245 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 10:58:48,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 10:58:48,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 10:58:48,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 10:58:48,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 10:58:48,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 10:58:48,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 10:58:48,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 10:58:48,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 10:58:48,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 10:58:48,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 10:58:48,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 10:58:48,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 10:58:48,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 10:58:48,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 10:58:48,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 10:58:48,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 10:58:48,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 10:58:48,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 10:58:48,294 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 10:58:48,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 10:58:48,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 10:58:48,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 10:58:48,296 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 10:58:48,298 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 10:58:48,348 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 10:58:48,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 10:58:48,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 10:58:48,353 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 10:58:48,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 10:58:48,355 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 10:58:48,356 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 10:58:48,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 10:58:48,356 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 10:58:48,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 10:58:48,358 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 10:58:48,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 10:58:48,359 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 10:58:48,359 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 10:58:48,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 10:58:48,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 10:58:48,360 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 10:58:48,360 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 10:58:48,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 10:58:48,360 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 10:58:48,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 10:58:48,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 10:58:48,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 10:58:48,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 10:58:48,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:58:48,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 10:58:48,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 10:58:48,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 10:58:48,365 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 10:58:48,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 10:58:48,365 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 10:58:48,366 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 10:58:48,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 10:58:48,366 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_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4fa401c700a21fa1f98a1481c8e8ba1555a45c0429555dc041a1c04ce1059991 [2022-11-16 10:58:48,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 10:58:48,790 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 10:58:48,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 10:58:48,796 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 10:58:48,797 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 10:58:48,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2022-11-16 10:58:48,886 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/data/1162096e1/d3c5102f04ad42d1b500ee41206d50cd/FLAG7fd0b63b1 [2022-11-16 10:58:49,436 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 10:58:49,437 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c [2022-11-16 10:58:49,444 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/data/1162096e1/d3c5102f04ad42d1b500ee41206d50cd/FLAG7fd0b63b1 [2022-11-16 10:58:49,801 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/data/1162096e1/d3c5102f04ad42d1b500ee41206d50cd [2022-11-16 10:58:49,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 10:58:49,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 10:58:49,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 10:58:49,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 10:58:49,816 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 10:58:49,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:58:49" (1/1) ... [2022-11-16 10:58:49,820 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d6ac0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:49, skipping insertion in model container [2022-11-16 10:58:49,821 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:58:49" (1/1) ... [2022-11-16 10:58:49,830 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 10:58:49,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:58:50,060 WARN L229 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_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2022-11-16 10:58:50,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:58:50,096 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 10:58:50,112 WARN L229 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_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/sv-benchmarks/c/array-multidimensional/init-non-constant-2-n-u.c[421,434] [2022-11-16 10:58:50,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:58:50,139 INFO L208 MainTranslator]: Completed translation [2022-11-16 10:58:50,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50 WrapperNode [2022-11-16 10:58:50,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 10:58:50,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 10:58:50,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 10:58:50,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 10:58:50,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,163 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,187 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2022-11-16 10:58:50,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 10:58:50,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 10:58:50,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 10:58:50,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 10:58:50,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,223 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,225 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 10:58:50,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 10:58:50,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 10:58:50,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 10:58:50,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (1/1) ... [2022-11-16 10:58:50,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:58:50,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:50,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 10:58:50,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 10:58:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 10:58:50,334 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 10:58:50,334 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 10:58:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 10:58:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 10:58:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 10:58:50,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 10:58:50,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 10:58:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 10:58:50,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 10:58:50,419 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 10:58:50,422 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 10:58:50,609 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 10:58:50,617 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 10:58:50,617 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 10:58:50,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:58:50 BoogieIcfgContainer [2022-11-16 10:58:50,620 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 10:58:50,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 10:58:50,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 10:58:50,628 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 10:58:50,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 10:58:49" (1/3) ... [2022-11-16 10:58:50,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626b5daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:58:50, skipping insertion in model container [2022-11-16 10:58:50,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:58:50" (2/3) ... [2022-11-16 10:58:50,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626b5daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:58:50, skipping insertion in model container [2022-11-16 10:58:50,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:58:50" (3/3) ... [2022-11-16 10:58:50,632 INFO L112 eAbstractionObserver]: Analyzing ICFG init-non-constant-2-n-u.c [2022-11-16 10:58:50,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 10:58:50,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 10:58:50,714 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 10:58:50,723 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;@4f017605, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 10:58:50,723 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 10:58:50,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 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) [2022-11-16 10:58:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 10:58:50,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:50,739 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:50,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:50,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:50,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1178325179, now seen corresponding path program 1 times [2022-11-16 10:58:50,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:50,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566596832] [2022-11-16 10:58:50,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:50,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:50,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:50,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639142982] [2022-11-16 10:58:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:50,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:50,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:50,893 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:50,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 10:58:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 10:58:51,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:58:51,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:51,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:51,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566596832] [2022-11-16 10:58:51,112 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:51,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639142982] [2022-11-16 10:58:51,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639142982] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:51,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:51,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:58:51,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640917741] [2022-11-16 10:58:51,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:51,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 10:58:51,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:51,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 10:58:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 10:58:51,191 INFO L87 Difference]: Start difference. First operand has 23 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 20 states have internal predecessors, (29), 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) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 10:58:51,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:51,241 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2022-11-16 10:58:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 10:58:51,247 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-16 10:58:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:51,256 INFO L225 Difference]: With dead ends: 43 [2022-11-16 10:58:51,256 INFO L226 Difference]: Without dead ends: 19 [2022-11-16 10:58:51,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 10:58:51,278 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:51,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 10:58:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-16 10:58:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-16 10:58:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 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) [2022-11-16 10:58:51,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-11-16 10:58:51,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 18 [2022-11-16 10:58:51,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:51,344 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-11-16 10:58:51,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 10:58:51,345 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-11-16 10:58:51,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 10:58:51,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:51,349 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:51,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 10:58:51,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 10:58:51,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:51,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:51,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1509384059, now seen corresponding path program 1 times [2022-11-16 10:58:51,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:51,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253224646] [2022-11-16 10:58:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:51,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:51,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:51,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1478403923] [2022-11-16 10:58:51,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:51,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:51,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:51,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:51,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 10:58:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:51,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 10:58:51,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:51,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:51,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:51,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253224646] [2022-11-16 10:58:51,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:51,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478403923] [2022-11-16 10:58:51,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478403923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:51,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:51,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 10:58:51,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091626739] [2022-11-16 10:58:51,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:51,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:58:51,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:51,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:58:51,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:51,869 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-16 10:58:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:52,030 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-11-16 10:58:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:58:52,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 18 [2022-11-16 10:58:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:52,033 INFO L225 Difference]: With dead ends: 38 [2022-11-16 10:58:52,034 INFO L226 Difference]: Without dead ends: 29 [2022-11-16 10:58:52,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:58:52,038 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:52,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:52,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-16 10:58:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-11-16 10:58:52,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 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) [2022-11-16 10:58:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-11-16 10:58:52,055 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 18 [2022-11-16 10:58:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:52,058 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-11-16 10:58:52,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-16 10:58:52,058 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-11-16 10:58:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 10:58:52,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:52,061 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:52,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:52,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:52,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:52,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1347743446, now seen corresponding path program 1 times [2022-11-16 10:58:52,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:52,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594633672] [2022-11-16 10:58:52,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:52,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:52,298 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:52,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286460057] [2022-11-16 10:58:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:52,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:52,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:52,301 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:52,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 10:58:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:52,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 10:58:52,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:52,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 10:58:52,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:52,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594633672] [2022-11-16 10:58:52,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:52,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286460057] [2022-11-16 10:58:52,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286460057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:58:52,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:58:52,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 10:58:52,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562622980] [2022-11-16 10:58:52,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:58:52,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:58:52,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:58:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:58:52,486 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-16 10:58:52,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:52,631 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-11-16 10:58:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 10:58:52,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 21 [2022-11-16 10:58:52,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:52,633 INFO L225 Difference]: With dead ends: 50 [2022-11-16 10:58:52,635 INFO L226 Difference]: Without dead ends: 27 [2022-11-16 10:58:52,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 10:58:52,637 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 19 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:52,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 62 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-16 10:58:52,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-11-16 10:58:52,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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) [2022-11-16 10:58:52,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-16 10:58:52,655 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 21 [2022-11-16 10:58:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:52,656 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-16 10:58:52,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-16 10:58:52,659 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-16 10:58:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 10:58:52,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:52,660 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:52,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:52,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:52,868 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:52,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:52,868 INFO L85 PathProgramCache]: Analyzing trace with hash -142126156, now seen corresponding path program 1 times [2022-11-16 10:58:52,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:52,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441306850] [2022-11-16 10:58:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:52,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:52,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:52,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749705305] [2022-11-16 10:58:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:52,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:52,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:52,898 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:52,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 10:58:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:52,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-16 10:58:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:53,214 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 [2022-11-16 10:58:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:53,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:53,767 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 27 treesize of output 25 [2022-11-16 10:58:53,797 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 41 treesize of output 39 [2022-11-16 10:58:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:54,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:54,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441306850] [2022-11-16 10:58:54,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:54,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749705305] [2022-11-16 10:58:54,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749705305] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:54,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:58:54,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2022-11-16 10:58:54,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533014426] [2022-11-16 10:58:54,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:54,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 10:58:54,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:54,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 10:58:54,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-11-16 10:58:54,160 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 10:58:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:55,882 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2022-11-16 10:58:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-16 10:58:55,882 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 22 [2022-11-16 10:58:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:55,885 INFO L225 Difference]: With dead ends: 91 [2022-11-16 10:58:55,885 INFO L226 Difference]: Without dead ends: 89 [2022-11-16 10:58:55,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=407, Invalid=1485, Unknown=0, NotChecked=0, Total=1892 [2022-11-16 10:58:55,887 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 246 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:55,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 140 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 10:58:55,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-16 10:58:55,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 30. [2022-11-16 10:58:55,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 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) [2022-11-16 10:58:55,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2022-11-16 10:58:55,922 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2022-11-16 10:58:55,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:55,922 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2022-11-16 10:58:55,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 10:58:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2022-11-16 10:58:55,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 10:58:55,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:55,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:55,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 10:58:56,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:56,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:56,134 INFO L85 PathProgramCache]: Analyzing trace with hash 762284573, now seen corresponding path program 1 times [2022-11-16 10:58:56,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:56,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675339062] [2022-11-16 10:58:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:56,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:56,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:56,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127198404] [2022-11-16 10:58:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:56,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:56,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:56,166 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:56,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 10:58:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:58:56,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 10:58:56,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:56,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:58:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:58:56,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:58:56,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675339062] [2022-11-16 10:58:56,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:58:56,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127198404] [2022-11-16 10:58:56,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127198404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:58:56,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:58:56,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 10:58:56,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374737575] [2022-11-16 10:58:56,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:58:56,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 10:58:56,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:58:56,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 10:58:56,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-16 10:58:56,418 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-11-16 10:58:56,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:58:56,604 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2022-11-16 10:58:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 10:58:56,605 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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 25 [2022-11-16 10:58:56,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:58:56,611 INFO L225 Difference]: With dead ends: 80 [2022-11-16 10:58:56,611 INFO L226 Difference]: Without dead ends: 67 [2022-11-16 10:58:56,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:58:56,614 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:58:56,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 97 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:58:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-16 10:58:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 52. [2022-11-16 10:58:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 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) [2022-11-16 10:58:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2022-11-16 10:58:56,647 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 25 [2022-11-16 10:58:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:58:56,648 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2022-11-16 10:58:56,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2022-11-16 10:58:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2022-11-16 10:58:56,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 10:58:56,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:58:56,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:58:56,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 10:58:56,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:56,857 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:58:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:58:56,857 INFO L85 PathProgramCache]: Analyzing trace with hash 923457379, now seen corresponding path program 2 times [2022-11-16 10:58:56,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:58:56,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255095065] [2022-11-16 10:58:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:58:56,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:58:56,875 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:58:56,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787675395] [2022-11-16 10:58:56,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:58:56,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:58:56,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:58:56,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:58:56,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 10:58:56,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:58:56,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:58:56,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 10:58:56,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:58:57,093 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 19 treesize of output 15 [2022-11-16 10:58:57,292 INFO L321 Elim1Store]: treesize reduction 37, result has 28.8 percent of original size [2022-11-16 10:58:57,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-11-16 10:58:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:58:57,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:02,823 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 41 treesize of output 39 [2022-11-16 10:59:02,839 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 250 treesize of output 246 [2022-11-16 10:59:05,362 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 10:59:05,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:59:05,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255095065] [2022-11-16 10:59:05,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:59:05,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787675395] [2022-11-16 10:59:05,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787675395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:05,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:59:05,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-16 10:59:05,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794937706] [2022-11-16 10:59:05,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:05,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 10:59:05,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:59:05,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 10:59:05,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=618, Unknown=2, NotChecked=0, Total=756 [2022-11-16 10:59:05,365 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 28 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 10:59:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:13,156 INFO L93 Difference]: Finished difference Result 127 states and 146 transitions. [2022-11-16 10:59:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-16 10:59:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2022-11-16 10:59:13,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:13,158 INFO L225 Difference]: With dead ends: 127 [2022-11-16 10:59:13,158 INFO L226 Difference]: Without dead ends: 125 [2022-11-16 10:59:13,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=668, Invalid=3490, Unknown=2, NotChecked=0, Total=4160 [2022-11-16 10:59:13,162 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 169 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:13,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 141 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 362 Invalid, 0 Unknown, 235 Unchecked, 1.3s Time] [2022-11-16 10:59:13,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-16 10:59:13,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 62. [2022-11-16 10:59:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.2758620689655173) internal successors, (74), 58 states have internal predecessors, (74), 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) [2022-11-16 10:59:13,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2022-11-16 10:59:13,223 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 26 [2022-11-16 10:59:13,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:13,231 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2022-11-16 10:59:13,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 10:59:13,233 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2022-11-16 10:59:13,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 10:59:13,234 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:13,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:13,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:13,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:59:13,442 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:59:13,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:13,443 INFO L85 PathProgramCache]: Analyzing trace with hash -789350489, now seen corresponding path program 2 times [2022-11-16 10:59:13,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:59:13,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590366297] [2022-11-16 10:59:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:13,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:59:13,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:59:13,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939780844] [2022-11-16 10:59:13,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:59:13,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:59:13,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:59:13,461 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:59:13,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 10:59:13,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:59:13,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:59:13,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 10:59:13,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:13,698 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 21 treesize of output 17 [2022-11-16 10:59:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:59:14,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:14,730 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 30 treesize of output 28 [2022-11-16 10:59:14,738 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 44 treesize of output 40 [2022-11-16 10:59:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:59:16,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:59:16,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590366297] [2022-11-16 10:59:16,216 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:59:16,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939780844] [2022-11-16 10:59:16,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939780844] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:16,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:59:16,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2022-11-16 10:59:16,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985020055] [2022-11-16 10:59:16,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:16,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 10:59:16,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:59:16,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 10:59:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-11-16 10:59:16,220 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 29 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 10:59:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:57,822 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2022-11-16 10:59:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-11-16 10:59:57,822 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2022-11-16 10:59:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:57,824 INFO L225 Difference]: With dead ends: 201 [2022-11-16 10:59:57,824 INFO L226 Difference]: Without dead ends: 199 [2022-11-16 10:59:57,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4240 ImplicationChecksByTransitivity, 40.2s TimeCoverageRelationStatistics Valid=2417, Invalid=10462, Unknown=3, NotChecked=0, Total=12882 [2022-11-16 10:59:57,834 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 515 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:57,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 190 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-16 10:59:57,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-16 10:59:57,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 88. [2022-11-16 10:59:57,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 84 states have (on average 1.2976190476190477) internal successors, (109), 84 states have internal predecessors, (109), 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) [2022-11-16 10:59:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 113 transitions. [2022-11-16 10:59:57,934 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 113 transitions. Word has length 26 [2022-11-16 10:59:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:57,935 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 113 transitions. [2022-11-16 10:59:57,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-16 10:59:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 113 transitions. [2022-11-16 10:59:57,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 10:59:57,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:57,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:57,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:58,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 10:59:58,153 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:59:58,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1681074929, now seen corresponding path program 1 times [2022-11-16 10:59:58,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:59:58,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878939034] [2022-11-16 10:59:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:58,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:59:58,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:59:58,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87458259] [2022-11-16 10:59:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:58,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:59:58,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:59:58,174 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:59:58,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 10:59:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:59:58,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 10:59:58,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 10:59:58,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:59:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 10:59:58,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:59:58,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878939034] [2022-11-16 10:59:58,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 10:59:58,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87458259] [2022-11-16 10:59:58,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87458259] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:59:58,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 10:59:58,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-16 10:59:58,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071573327] [2022-11-16 10:59:58,424 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 10:59:58,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 10:59:58,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:59:58,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 10:59:58,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-16 10:59:58,425 INFO L87 Difference]: Start difference. First operand 88 states and 113 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 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) [2022-11-16 10:59:58,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:59:58,667 INFO L93 Difference]: Finished difference Result 160 states and 200 transitions. [2022-11-16 10:59:58,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 10:59:58,668 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 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 28 [2022-11-16 10:59:58,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:59:58,670 INFO L225 Difference]: With dead ends: 160 [2022-11-16 10:59:58,670 INFO L226 Difference]: Without dead ends: 126 [2022-11-16 10:59:58,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-16 10:59:58,672 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 46 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:59:58,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 85 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:59:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-16 10:59:58,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 79. [2022-11-16 10:59:58,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.24) internal successors, (93), 75 states have internal predecessors, (93), 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) [2022-11-16 10:59:58,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2022-11-16 10:59:58,736 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 28 [2022-11-16 10:59:58,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:59:58,737 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2022-11-16 10:59:58,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 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) [2022-11-16 10:59:58,737 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2022-11-16 10:59:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 10:59:58,738 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:59:58,738 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:59:58,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 10:59:58,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 10:59:58,946 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 10:59:58,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:59:58,947 INFO L85 PathProgramCache]: Analyzing trace with hash 777979813, now seen corresponding path program 3 times [2022-11-16 10:59:58,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:59:58,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540932258] [2022-11-16 10:59:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:59:58,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:59:58,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 10:59:58,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1664273750] [2022-11-16 10:59:58,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 10:59:58,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:59:58,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:59:58,973 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:59:58,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 10:59:59,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 10:59:59,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:59:59,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 10:59:59,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:59:59,289 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 25 treesize of output 22 [2022-11-16 10:59:59,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 10:59:59,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 10:59:59,467 INFO L321 Elim1Store]: treesize reduction 27, result has 48.1 percent of original size [2022-11-16 10:59:59,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 51 [2022-11-16 10:59:59,680 INFO L321 Elim1Store]: treesize reduction 143, result has 36.4 percent of original size [2022-11-16 10:59:59,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 131 [2022-11-16 11:00:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:00:00,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:00:13,149 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 70 treesize of output 68 [2022-11-16 11:00:13,166 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 1008 treesize of output 1004 [2022-11-16 11:00:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:00:27,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:00:27,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540932258] [2022-11-16 11:00:27,990 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:00:27,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664273750] [2022-11-16 11:00:27,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664273750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:00:27,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:00:27,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2022-11-16 11:00:27,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019497434] [2022-11-16 11:00:27,991 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:00:27,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-16 11:00:27,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:00:27,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-16 11:00:27,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=786, Unknown=5, NotChecked=0, Total=930 [2022-11-16 11:00:27,993 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 31 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:00:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:00:33,111 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2022-11-16 11:00:33,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-16 11:00:33,112 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-11-16 11:00:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:00:33,113 INFO L225 Difference]: With dead ends: 143 [2022-11-16 11:00:33,113 INFO L226 Difference]: Without dead ends: 141 [2022-11-16 11:00:33,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=579, Invalid=2171, Unknown=6, NotChecked=0, Total=2756 [2022-11-16 11:00:33,115 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 149 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:00:33,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 244 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 288 Invalid, 0 Unknown, 262 Unchecked, 0.8s Time] [2022-11-16 11:00:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-16 11:00:33,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 86. [2022-11-16 11:00:33,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 82 states have internal predecessors, (102), 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) [2022-11-16 11:00:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2022-11-16 11:00:33,190 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 28 [2022-11-16 11:00:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:00:33,190 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2022-11-16 11:00:33,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:00:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2022-11-16 11:00:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-16 11:00:33,192 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:00:33,192 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:00:33,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:00:33,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:00:33,398 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:00:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:00:33,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1330785433, now seen corresponding path program 4 times [2022-11-16 11:00:33,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:00:33,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083159659] [2022-11-16 11:00:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:00:33,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:00:33,407 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:00:33,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125430328] [2022-11-16 11:00:33,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:00:33,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:00:33,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:00:33,409 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:00:33,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:00:33,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:00:33,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:00:33,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:00:33,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:00:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:00:33,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:00:33,611 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:00:33,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:00:33,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083159659] [2022-11-16 11:00:33,612 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:00:33,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125430328] [2022-11-16 11:00:33,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125430328] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:00:33,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:00:33,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-16 11:00:33,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766935408] [2022-11-16 11:00:33,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:00:33,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:00:33,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:00:33,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:00:33,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:00:33,613 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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) [2022-11-16 11:00:33,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:00:33,915 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2022-11-16 11:00:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:00:33,916 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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 29 [2022-11-16 11:00:33,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:00:33,917 INFO L225 Difference]: With dead ends: 181 [2022-11-16 11:00:33,917 INFO L226 Difference]: Without dead ends: 137 [2022-11-16 11:00:33,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:00:33,918 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:00:33,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 152 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:00:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-16 11:00:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 100. [2022-11-16 11:00:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 96 states have (on average 1.2916666666666667) internal successors, (124), 96 states have internal predecessors, (124), 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) [2022-11-16 11:00:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 128 transitions. [2022-11-16 11:00:33,963 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 128 transitions. Word has length 29 [2022-11-16 11:00:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:00:33,963 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 128 transitions. [2022-11-16 11:00:33,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 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) [2022-11-16 11:00:33,964 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 128 transitions. [2022-11-16 11:00:33,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:00:33,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:00:33,964 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:00:33,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:00:34,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:00:34,169 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:00:34,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:00:34,170 INFO L85 PathProgramCache]: Analyzing trace with hash 439948756, now seen corresponding path program 3 times [2022-11-16 11:00:34,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:00:34,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255647034] [2022-11-16 11:00:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:00:34,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:00:34,181 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:00:34,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117052529] [2022-11-16 11:00:34,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:00:34,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:00:34,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:00:34,183 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:00:34,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:00:34,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-16 11:00:34,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:00:34,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-16 11:00:34,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:00:34,458 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 21 treesize of output 17 [2022-11-16 11:00:34,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2022-11-16 11:00:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:00:35,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:00:37,302 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 202 treesize of output 196 [2022-11-16 11:00:39,149 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:00:39,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 727 treesize of output 711 [2022-11-16 11:00:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:00:47,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:00:47,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255647034] [2022-11-16 11:00:47,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:00:47,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117052529] [2022-11-16 11:00:47,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117052529] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:00:47,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:00:47,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2022-11-16 11:00:47,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963935503] [2022-11-16 11:00:47,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:00:47,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-16 11:00:47,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:00:47,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-16 11:00:47,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2022-11-16 11:00:47,970 INFO L87 Difference]: Start difference. First operand 100 states and 128 transitions. Second operand has 36 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:01:06,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 11:01:31,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2022-11-16 11:01:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:01:40,020 INFO L93 Difference]: Finished difference Result 162 states and 198 transitions. [2022-11-16 11:01:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 11:01:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-16 11:01:40,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:01:40,023 INFO L225 Difference]: With dead ends: 162 [2022-11-16 11:01:40,023 INFO L226 Difference]: Without dead ends: 160 [2022-11-16 11:01:40,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=664, Invalid=3626, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 11:01:40,025 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 215 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 53 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:01:40,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 188 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 580 Invalid, 1 Unknown, 0 Unchecked, 11.7s Time] [2022-11-16 11:01:40,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-16 11:01:40,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 103. [2022-11-16 11:01:40,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 99 states have (on average 1.2828282828282829) internal successors, (127), 99 states have internal predecessors, (127), 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) [2022-11-16 11:01:40,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 131 transitions. [2022-11-16 11:01:40,117 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 131 transitions. Word has length 30 [2022-11-16 11:01:40,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:01:40,117 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 131 transitions. [2022-11-16 11:01:40,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-16 11:01:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 131 transitions. [2022-11-16 11:01:40,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:01:40,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:01:40,119 INFO L195 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:01:40,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:01:40,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:01:40,323 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:01:40,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:01:40,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1934605021, now seen corresponding path program 5 times [2022-11-16 11:01:40,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:01:40,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478906425] [2022-11-16 11:01:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:01:40,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:01:40,333 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:01:40,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137540035] [2022-11-16 11:01:40,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:01:40,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:01:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:01:40,335 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:01:40,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0fe5fe5e-aaa1-48ab-9460-bef2ec6853ee/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:01:40,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-16 11:01:40,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:01:40,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:01:40,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:01:40,715 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 25 treesize of output 22 [2022-11-16 11:01:40,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 43 [2022-11-16 11:01:40,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2022-11-16 11:01:40,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:40,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-16 11:01:41,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:41,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-16 11:01:41,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:01:41,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-11-16 11:01:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:01:41,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:01:52,320 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 82 treesize of output 80 [2022-11-16 11:01:52,376 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 7368712 treesize of output 7360520 [2022-11-16 11:02:16,564 WARN L233 SmtUtils]: Spent 24.18s on a formula simplification that was a NOOP. DAG size: 2277 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 11:04:01,344 WARN L233 SmtUtils]: Spent 1.35m on a formula simplification. DAG size of input: 2273 DAG size of output: 2273 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 11:06:00,810 WARN L233 SmtUtils]: Spent 1.63m on a formula simplification. DAG size of input: 2271 DAG size of output: 2271 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 11:07:23,854 WARN L233 SmtUtils]: Spent 36.60s on a formula simplification that was a NOOP. DAG size: 2235 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 11:08:39,289 WARN L233 SmtUtils]: Spent 44.00s on a formula simplification. DAG size of input: 2165 DAG size of output: 2163 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 11:10:31,816 WARN L233 SmtUtils]: Spent 1.64m on a formula simplification. DAG size of input: 2163 DAG size of output: 2163 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 11:12:10,422 WARN L233 SmtUtils]: Spent 1.24m on a formula simplification. DAG size of input: 2161 DAG size of output: 2161 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-16 11:13:35,319 WARN L233 SmtUtils]: Spent 1.17m on a formula simplification. DAG size of input: 2159 DAG size of output: 2159 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)