./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/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_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/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_819532ac-032f-433c-9eb7-8f3ab7a51c41/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 ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e --- 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 12:00:54,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:00:54,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:00:54,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:00:54,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:00:54,371 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:00:54,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:00:54,374 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:00:54,376 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:00:54,377 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:00:54,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:00:54,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:00:54,379 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:00:54,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:00:54,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:00:54,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:00:54,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:00:54,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:00:54,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:00:54,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:00:54,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:00:54,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:00:54,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:00:54,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:00:54,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:00:54,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:00:54,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:00:54,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:00:54,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:00:54,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:00:54,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:00:54,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:00:54,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:00:54,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:00:54,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:00:54,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:00:54,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:00:54,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:00:54,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:00:54,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:00:54,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:00:54,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:00:54,431 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:00:54,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:00:54,432 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:00:54,432 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:00:54,433 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:00:54,433 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:00:54,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:00:54,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:00:54,434 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:00:54,434 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:00:54,434 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:00:54,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:00:54,435 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:00:54,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:00:54,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:00:54,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:00:54,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:00:54,435 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:00:54,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:00:54,436 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:00:54,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:00:54,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:00:54,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:00:54,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:00:54,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:00:54,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:00:54,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:00:54,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:00:54,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:00:54,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:00:54,438 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:00:54,438 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:00:54,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:00:54,438 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_819532ac-032f-433c-9eb7-8f3ab7a51c41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e [2022-11-16 12:00:54,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:00:54,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:00:54,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:00:54,752 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:00:54,753 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:00:54,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2022-11-16 12:00:54,824 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/data/349f7df68/4f2f62defd974551a53eb4fd4e8de719/FLAGbb08544b9 [2022-11-16 12:00:55,348 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:00:55,349 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2022-11-16 12:00:55,366 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/data/349f7df68/4f2f62defd974551a53eb4fd4e8de719/FLAGbb08544b9 [2022-11-16 12:00:55,706 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/data/349f7df68/4f2f62defd974551a53eb4fd4e8de719 [2022-11-16 12:00:55,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:00:55,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:00:55,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:00:55,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:00:55,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:00:55,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:00:55" (1/1) ... [2022-11-16 12:00:55,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f92366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:55, skipping insertion in model container [2022-11-16 12:00:55,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:00:55" (1/1) ... [2022-11-16 12:00:55,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:00:55,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:00:55,982 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_819532ac-032f-433c-9eb7-8f3ab7a51c41/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2022-11-16 12:00:56,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:00:56,030 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:00:56,046 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_819532ac-032f-433c-9eb7-8f3ab7a51c41/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2022-11-16 12:00:56,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:00:56,094 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:00:56,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56 WrapperNode [2022-11-16 12:00:56,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:00:56,095 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:00:56,096 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:00:56,096 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:00:56,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,109 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,130 INFO L138 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 118 [2022-11-16 12:00:56,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:00:56,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:00:56,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:00:56,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:00:56,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,153 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,155 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:00:56,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:00:56,159 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:00:56,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:00:56,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (1/1) ... [2022-11-16 12:00:56,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:00:56,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:56,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:00:56,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:00:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:00:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:00:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:00:56,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:00:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:00:56,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:00:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:00:56,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:00:56,337 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:00:56,339 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:00:56,536 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:00:56,542 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:00:56,542 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-16 12:00:56,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:00:56 BoogieIcfgContainer [2022-11-16 12:00:56,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:00:56,546 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:00:56,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:00:56,550 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:00:56,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:00:55" (1/3) ... [2022-11-16 12:00:56,551 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c93a835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:00:56, skipping insertion in model container [2022-11-16 12:00:56,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:00:56" (2/3) ... [2022-11-16 12:00:56,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c93a835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:00:56, skipping insertion in model container [2022-11-16 12:00:56,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:00:56" (3/3) ... [2022-11-16 12:00:56,553 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2022-11-16 12:00:56,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:00:56,573 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:00:56,656 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:00:56,668 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;@515111dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:00:56,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 12:00:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:00:56,701 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:56,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:56,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:56,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2022-11-16 12:00:56,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:56,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106395544] [2022-11-16 12:00:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:56,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:56,826 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:00:56,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244140060] [2022-11-16 12:00:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:56,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:56,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:56,831 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:56,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:00:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-16 12:00:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:57,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:00:57,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:57,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106395544] [2022-11-16 12:00:57,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:00:57,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244140060] [2022-11-16 12:00:57,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244140060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:57,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:57,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:00:57,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029564643] [2022-11-16 12:00:57,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:57,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:00:57,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:57,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:00:57,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:00:57,055 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:57,075 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2022-11-16 12:00:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:00:57,077 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:00:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:57,085 INFO L225 Difference]: With dead ends: 52 [2022-11-16 12:00:57,085 INFO L226 Difference]: Without dead ends: 23 [2022-11-16 12:00:57,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 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 12:00:57,092 INFO L413 NwaCegarLoop]: 35 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, 35 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 12:00:57,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:00:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-16 12:00:57,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-16 12:00:57,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-11-16 12:00:57,141 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2022-11-16 12:00:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:57,141 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-11-16 12:00:57,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,142 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-11-16 12:00:57,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:00:57,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:57,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:57,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:57,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-16 12:00:57,345 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:57,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:57,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2022-11-16 12:00:57,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:57,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101174400] [2022-11-16 12:00:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:57,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:57,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:00:57,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71355755] [2022-11-16 12:00:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:57,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:57,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:57,367 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:57,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:00:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:57,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:00:57,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:57,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:00:57,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:57,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101174400] [2022-11-16 12:00:57,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:00:57,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71355755] [2022-11-16 12:00:57,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71355755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:57,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:57,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:00:57,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121051754] [2022-11-16 12:00:57,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:57,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:00:57,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:57,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:00:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:00:57,564 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:57,602 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-11-16 12:00:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:00:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-16 12:00:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:57,604 INFO L225 Difference]: With dead ends: 44 [2022-11-16 12:00:57,604 INFO L226 Difference]: Without dead ends: 28 [2022-11-16 12:00:57,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:00:57,606 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:57,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:00:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-16 12:00:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-11-16 12:00:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-11-16 12:00:57,612 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2022-11-16 12:00:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:57,612 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-11-16 12:00:57,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:57,612 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-11-16 12:00:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 12:00:57,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:57,613 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:57,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:57,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:57,819 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:57,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2022-11-16 12:00:57,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:57,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062517207] [2022-11-16 12:00:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:57,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:57,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:00:57,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990397958] [2022-11-16 12:00:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:57,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:57,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:57,848 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:57,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:00:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:57,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:00:57,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:57,978 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:00:57,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062517207] [2022-11-16 12:00:57,979 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:00:57,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990397958] [2022-11-16 12:00:57,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990397958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:57,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:57,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:00:57,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300787777] [2022-11-16 12:00:57,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:57,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:00:57,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:00:57,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:00:57,982 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:58,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:58,048 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2022-11-16 12:00:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:00:58,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 12:00:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:58,049 INFO L225 Difference]: With dead ends: 61 [2022-11-16 12:00:58,049 INFO L226 Difference]: Without dead ends: 40 [2022-11-16 12:00:58,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:00:58,051 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:58,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:00:58,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-16 12:00:58,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2022-11-16 12:00:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2022-11-16 12:00:58,059 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2022-11-16 12:00:58,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:58,059 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2022-11-16 12:00:58,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:58,059 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2022-11-16 12:00:58,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 12:00:58,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:58,060 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:58,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:58,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:58,266 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:58,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2022-11-16 12:00:58,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:58,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655517860] [2022-11-16 12:00:58,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:58,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:58,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:00:58,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85358967] [2022-11-16 12:00:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:58,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:58,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:58,282 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:58,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:00:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:00:58,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:58,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:00:58,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:58,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655517860] [2022-11-16 12:00:58,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:00:58,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85358967] [2022-11-16 12:00:58,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85358967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:58,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:58,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:00:58,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911656239] [2022-11-16 12:00:58,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:58,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:00:58,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:00:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:00:58,385 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:58,450 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2022-11-16 12:00:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:00:58,451 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 12:00:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:58,452 INFO L225 Difference]: With dead ends: 61 [2022-11-16 12:00:58,452 INFO L226 Difference]: Without dead ends: 37 [2022-11-16 12:00:58,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:00:58,454 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:58,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:00:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-16 12:00:58,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-11-16 12:00:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:58,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-11-16 12:00:58,462 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-11-16 12:00:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:58,463 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-11-16 12:00:58,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-11-16 12:00:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 12:00:58,464 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:58,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:58,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:58,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:58,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2022-11-16 12:00:58,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:58,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056003325] [2022-11-16 12:00:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:58,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:58,688 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:00:58,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132638247] [2022-11-16 12:00:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:58,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:58,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:58,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:58,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:00:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:58,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:00:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:58,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:00:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:00:58,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:58,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056003325] [2022-11-16 12:00:58,908 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:00:58,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132638247] [2022-11-16 12:00:58,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132638247] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:00:58,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:00:58,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-16 12:00:58,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568396110] [2022-11-16 12:00:58,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:00:58,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:00:58,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:58,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:00:58,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:00:58,917 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:59,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:59,074 INFO L93 Difference]: Finished difference Result 81 states and 107 transitions. [2022-11-16 12:00:59,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:00:59,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 12:00:59,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:59,076 INFO L225 Difference]: With dead ends: 81 [2022-11-16 12:00:59,076 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 12:00:59,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:00:59,083 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:59,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 69 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:00:59,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 12:00:59,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-11-16 12:00:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:59,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-11-16 12:00:59,101 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 18 [2022-11-16 12:00:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:59,102 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-11-16 12:00:59,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:59,102 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-11-16 12:00:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 12:00:59,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:59,103 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:59,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:00:59,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:59,309 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:59,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:59,310 INFO L85 PathProgramCache]: Analyzing trace with hash 988124671, now seen corresponding path program 2 times [2022-11-16 12:00:59,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:59,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104710983] [2022-11-16 12:00:59,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:59,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:59,334 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:00:59,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [386480878] [2022-11-16 12:00:59,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:00:59,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:59,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:59,341 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:59,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:00:59,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 12:00:59,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:00:59,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 12:00:59,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:00:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:00:59,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 12:00:59,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:00:59,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104710983] [2022-11-16 12:00:59,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:00:59,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386480878] [2022-11-16 12:00:59,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386480878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:00:59,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:00:59,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 12:00:59,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180026917] [2022-11-16 12:00:59,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:00:59,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:00:59,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:00:59,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:00:59,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:00:59,487 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:00:59,557 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-11-16 12:00:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:00:59,558 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-16 12:00:59,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:00:59,560 INFO L225 Difference]: With dead ends: 105 [2022-11-16 12:00:59,560 INFO L226 Difference]: Without dead ends: 84 [2022-11-16 12:00:59,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:00:59,562 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 12:00:59,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 38 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 12:00:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-16 12:00:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2022-11-16 12:00:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-11-16 12:00:59,578 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-11-16 12:00:59,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:00:59,579 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-11-16 12:00:59,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:00:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-11-16 12:00:59,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-16 12:00:59,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:00:59,580 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:00:59,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 12:00:59,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:59,787 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:00:59,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:00:59,788 INFO L85 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 1 times [2022-11-16 12:00:59,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:00:59,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522297963] [2022-11-16 12:00:59,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:59,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:00:59,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:00:59,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492984634] [2022-11-16 12:00:59,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:00:59,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:00:59,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:00:59,811 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:00:59,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:00:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:00:59,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:00:59,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:01:00,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 12:01:00,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:00,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522297963] [2022-11-16 12:01:00,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:01:00,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492984634] [2022-11-16 12:01:00,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492984634] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:00,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:00,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-16 12:01:00,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810133516] [2022-11-16 12:01:00,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:00,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:01:00,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:00,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:01:00,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:01:00,109 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:00,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:00,403 INFO L93 Difference]: Finished difference Result 138 states and 175 transitions. [2022-11-16 12:01:00,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 12:01:00,404 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-11-16 12:01:00,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:00,405 INFO L225 Difference]: With dead ends: 138 [2022-11-16 12:01:00,405 INFO L226 Difference]: Without dead ends: 95 [2022-11-16 12:01:00,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-11-16 12:01:00,406 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 171 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:00,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 65 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:01:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-16 12:01:00,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2022-11-16 12:01:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.24) internal successors, (93), 75 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:00,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-11-16 12:01:00,426 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 31 [2022-11-16 12:01:00,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:00,426 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-11-16 12:01:00,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:00,426 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-11-16 12:01:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 12:01:00,427 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:00,427 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:00,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:00,632 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:00,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:00,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2141491421, now seen corresponding path program 2 times [2022-11-16 12:01:00,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:00,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036451867] [2022-11-16 12:01:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:00,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:01:00,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145415856] [2022-11-16 12:01:00,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:01:00,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:00,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:00,676 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:00,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:01:00,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:01:00,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:01:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-16 12:01:01,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:01,289 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-16 12:01:01,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:01,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036451867] [2022-11-16 12:01:01,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:01:01,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145415856] [2022-11-16 12:01:01,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145415856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:01,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:01,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-16 12:01:01,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718811885] [2022-11-16 12:01:01,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:01,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 12:01:01,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:01,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 12:01:01,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-11-16 12:01:01,292 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:01,932 INFO L93 Difference]: Finished difference Result 252 states and 313 transitions. [2022-11-16 12:01:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 12:01:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-16 12:01:01,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:01,936 INFO L225 Difference]: With dead ends: 252 [2022-11-16 12:01:01,936 INFO L226 Difference]: Without dead ends: 179 [2022-11-16 12:01:01,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-11-16 12:01:01,938 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 522 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:01,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 112 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:01:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-11-16 12:01:01,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 136. [2022-11-16 12:01:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2222222222222223) internal successors, (165), 135 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2022-11-16 12:01:01,991 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 43 [2022-11-16 12:01:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:01,992 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2022-11-16 12:01:01,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:01,992 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2022-11-16 12:01:02,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 12:01:02,000 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:02,000 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:02,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:02,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-16 12:01:02,207 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:02,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:02,207 INFO L85 PathProgramCache]: Analyzing trace with hash 587853597, now seen corresponding path program 3 times [2022-11-16 12:01:02,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:02,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046148441] [2022-11-16 12:01:02,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:02,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:02,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:01:02,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1315029867] [2022-11-16 12:01:02,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:01:02,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:02,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:02,277 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:02,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:01:02,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:01:02,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:01:02,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:01:02,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:01:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2022-11-16 12:01:02,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:01:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2022-11-16 12:01:02,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:01:02,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046148441] [2022-11-16 12:01:02,747 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 12:01:02,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315029867] [2022-11-16 12:01:02,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315029867] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:01:02,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:01:02,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-16 12:01:02,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915754611] [2022-11-16 12:01:02,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 12:01:02,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:01:02,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:01:02,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:01:02,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:01:02,750 INFO L87 Difference]: Start difference. First operand 136 states and 165 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:01:02,981 INFO L93 Difference]: Finished difference Result 632 states and 774 transitions. [2022-11-16 12:01:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:01:02,982 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-11-16 12:01:02,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:01:02,984 INFO L225 Difference]: With dead ends: 632 [2022-11-16 12:01:02,984 INFO L226 Difference]: Without dead ends: 527 [2022-11-16 12:01:02,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:01:02,985 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 204 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:01:02,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 71 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:01:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-11-16 12:01:03,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 304. [2022-11-16 12:01:03,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.1386138613861385) internal successors, (345), 303 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 345 transitions. [2022-11-16 12:01:03,055 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 345 transitions. Word has length 67 [2022-11-16 12:01:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:01:03,055 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 345 transitions. [2022-11-16 12:01:03,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:01:03,056 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 345 transitions. [2022-11-16 12:01:03,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-11-16 12:01:03,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:01:03,058 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:01:03,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:01:03,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:03,264 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 12:01:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:01:03,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1854973743, now seen corresponding path program 4 times [2022-11-16 12:01:03,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:01:03,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312750308] [2022-11-16 12:01:03,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:01:03,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:01:03,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 12:01:03,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958714757] [2022-11-16 12:01:03,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:01:03,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:01:03,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:01:03,424 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:01:03,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_819532ac-032f-433c-9eb7-8f3ab7a51c41/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process