./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/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_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/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 64bit --witnessprinter.graph.data.programhash 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c --- 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 11:19:53,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:19:53,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:19:53,556 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:19:53,556 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:19:53,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:19:53,559 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:19:53,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:19:53,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:19:53,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:19:53,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:19:53,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:19:53,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:19:53,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:19:53,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:19:53,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:19:53,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:19:53,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:19:53,575 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:19:53,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:19:53,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:19:53,586 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:19:53,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:19:53,592 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:19:53,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:19:53,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:19:53,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:19:53,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:19:53,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:19:53,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:19:53,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:19:53,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:19:53,609 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:19:53,610 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:19:53,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:19:53,613 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:19:53,614 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:19:53,615 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:19:53,615 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:19:53,616 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:19:53,617 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:19:53,618 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-16 11:19:53,659 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:19:53,659 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:19:53,660 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:19:53,660 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:19:53,661 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:19:53,661 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:19:53,662 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:19:53,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:19:53,663 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:19:53,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:19:53,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:19:53,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:19:53,664 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:19:53,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:19:53,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:19:53,665 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:19:53,665 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:19:53,666 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:19:53,666 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:19:53,666 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:19:53,666 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:19:53,667 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:19:53,667 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:19:53,667 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:19:53,667 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:19:53,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:19:53,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:19:53,668 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:19:53,668 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:19:53,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:19:53,669 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_d12ac3c1-63ed-4774-adb4-f293fce88864/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1cccbd170603672b3f74a5336cc730c4afa341837cef68e5226707c3c82e670c [2022-11-16 11:19:54,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:19:54,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:19:54,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:19:54,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:19:54,031 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:19:54,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-16 11:19:54,100 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/data/15a593729/50572d0b4b77456c9c2f95b9b63ece5a/FLAG878c09ffd [2022-11-16 11:19:55,001 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:19:55,002 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-16 11:19:55,047 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/data/15a593729/50572d0b4b77456c9c2f95b9b63ece5a/FLAG878c09ffd [2022-11-16 11:19:55,116 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/data/15a593729/50572d0b4b77456c9c2f95b9b63ece5a [2022-11-16 11:19:55,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:19:55,121 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:19:55,122 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:19:55,122 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:19:55,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:19:55,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:19:55" (1/1) ... [2022-11-16 11:19:55,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b082a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:55, skipping insertion in model container [2022-11-16 11:19:55,129 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:19:55" (1/1) ... [2022-11-16 11:19:55,137 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:19:55,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:19:56,151 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_d12ac3c1-63ed-4774-adb4-f293fce88864/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-11-16 11:19:56,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:19:56,756 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:19:56,866 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_d12ac3c1-63ed-4774-adb4-f293fce88864/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i[158694,158707] [2022-11-16 11:19:57,014 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:19:57,103 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:19:57,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57 WrapperNode [2022-11-16 11:19:57,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:19:57,107 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:19:57,107 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:19:57,108 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:19:57,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,278 INFO L138 Inliner]: procedures = 181, calls = 601, calls flagged for inlining = 90, calls inlined = 85, statements flattened = 2007 [2022-11-16 11:19:57,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:19:57,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:19:57,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:19:57,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:19:57,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,316 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,436 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:19:57,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:19:57,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:19:57,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:19:57,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (1/1) ... [2022-11-16 11:19:57,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:19:57,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:19:57,510 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:19:57,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:19:57,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2022-11-16 11:19:57,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2022-11-16 11:19:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-11-16 11:19:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2022-11-16 11:19:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-16 11:19:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-16 11:19:57,563 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-16 11:19:57,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-16 11:19:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:19:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2022-11-16 11:19:57,564 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2022-11-16 11:19:57,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-16 11:19:57,565 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-16 11:19:57,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2022-11-16 11:19:57,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2022-11-16 11:19:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 11:19:57,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 11:19:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2022-11-16 11:19:57,566 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2022-11-16 11:19:57,566 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_transmit [2022-11-16 11:19:57,567 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_transmit [2022-11-16 11:19:57,567 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2022-11-16 11:19:57,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2022-11-16 11:19:57,567 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-16 11:19:57,567 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-16 11:19:57,567 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_ioctl [2022-11-16 11:19:57,568 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_ioctl [2022-11-16 11:19:57,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:19:57,568 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_timeout [2022-11-16 11:19:57,568 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_timeout [2022-11-16 11:19:57,568 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-16 11:19:57,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-16 11:19:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-16 11:19:57,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-16 11:19:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2022-11-16 11:19:57,569 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2022-11-16 11:19:57,569 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-16 11:19:57,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-16 11:19:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-16 11:19:57,570 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-16 11:19:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:19:57,570 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2022-11-16 11:19:57,571 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2022-11-16 11:19:57,571 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2022-11-16 11:19:57,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2022-11-16 11:19:57,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:19:57,571 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_change_mtu [2022-11-16 11:19:57,572 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_change_mtu [2022-11-16 11:19:57,572 INFO L130 BoogieDeclarations]: Found specification of procedure x25_type_trans [2022-11-16 11:19:57,572 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_type_trans [2022-11-16 11:19:57,572 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-11-16 11:19:57,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-11-16 11:19:57,572 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_unlock [2022-11-16 11:19:57,573 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_unlock [2022-11-16 11:19:57,573 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_compat_ioctl [2022-11-16 11:19:57,574 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_compat_ioctl [2022-11-16 11:19:57,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:19:57,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:19:57,575 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2022-11-16 11:19:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2022-11-16 11:19:57,576 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_data_indication [2022-11-16 11:19:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_data_indication [2022-11-16 11:19:57,576 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2022-11-16 11:19:57,576 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2022-11-16 11:19:57,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:19:57,577 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2022-11-16 11:19:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2022-11-16 11:19:57,577 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_disconnected [2022-11-16 11:19:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_disconnected [2022-11-16 11:19:57,577 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-16 11:19:57,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2022-11-16 11:19:57,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:19:57,578 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2022-11-16 11:19:57,579 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2022-11-16 11:19:57,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 11:19:57,579 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2022-11-16 11:19:57,579 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2022-11-16 11:19:57,579 INFO L130 BoogieDeclarations]: Found specification of procedure x25_asy_connected [2022-11-16 11:19:57,579 INFO L138 BoogieDeclarations]: Found implementation of procedure x25_asy_connected [2022-11-16 11:19:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-11-16 11:19:57,580 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-11-16 11:19:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-11-16 11:19:57,580 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-11-16 11:19:57,580 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-16 11:19:57,580 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-16 11:19:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-16 11:19:57,581 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-16 11:19:57,581 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2022-11-16 11:19:57,581 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2022-11-16 11:19:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-11-16 11:19:57,582 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-11-16 11:19:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:19:57,582 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2022-11-16 11:19:57,583 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2022-11-16 11:19:57,583 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2022-11-16 11:19:57,584 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2022-11-16 11:19:57,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-11-16 11:19:57,584 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-11-16 11:19:57,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-11-16 11:19:57,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:19:57,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:19:57,585 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2022-11-16 11:19:57,585 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2022-11-16 11:19:58,117 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:19:58,120 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:19:58,337 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-16 11:19:59,906 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:19:59,920 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:19:59,920 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-16 11:19:59,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:19:59 BoogieIcfgContainer [2022-11-16 11:19:59,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:19:59,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:19:59,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:19:59,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:19:59,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:19:55" (1/3) ... [2022-11-16 11:19:59,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b28959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:19:59, skipping insertion in model container [2022-11-16 11:19:59,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:19:57" (2/3) ... [2022-11-16 11:19:59,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15b28959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:19:59, skipping insertion in model container [2022-11-16 11:19:59,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:19:59" (3/3) ... [2022-11-16 11:19:59,932 INFO L112 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--x25_asy.ko-entry_point.cil.out.i [2022-11-16 11:19:59,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:19:59,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:20:00,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:20:00,020 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;@388d45ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:20:00,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:20:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 728 states, 532 states have (on average 1.3740601503759398) internal successors, (731), 548 states have internal predecessors, (731), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) [2022-11-16 11:20:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-16 11:20:00,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:00,044 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:00,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:00,050 INFO L85 PathProgramCache]: Analyzing trace with hash 94820773, now seen corresponding path program 1 times [2022-11-16 11:20:00,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:00,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406196242] [2022-11-16 11:20:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:00,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:00,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 11:20:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:00,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-16 11:20:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:00,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-16 11:20:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:00,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-11-16 11:20:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:00,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-16 11:20:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:00,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-11-16 11:20:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:20:00,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:00,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406196242] [2022-11-16 11:20:00,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406196242] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:00,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:00,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:20:00,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186812191] [2022-11-16 11:20:00,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:00,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:20:00,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:20:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:20:00,735 INFO L87 Difference]: Start difference. First operand has 728 states, 532 states have (on average 1.3740601503759398) internal successors, (731), 548 states have internal predecessors, (731), 152 states have call successors, (152), 43 states have call predecessors, (152), 42 states have return successors, (147), 145 states have call predecessors, (147), 147 states have call successors, (147) Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:20:03,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:03,888 INFO L93 Difference]: Finished difference Result 2359 states and 3534 transitions. [2022-11-16 11:20:03,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:20:03,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2022-11-16 11:20:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:03,917 INFO L225 Difference]: With dead ends: 2359 [2022-11-16 11:20:03,917 INFO L226 Difference]: Without dead ends: 1618 [2022-11-16 11:20:03,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:20:03,931 INFO L413 NwaCegarLoop]: 909 mSDtfsCounter, 1474 mSDsluCounter, 1744 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 2653 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 512 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:03,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 2653 Invalid, 1860 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [512 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-16 11:20:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-11-16 11:20:04,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 1372. [2022-11-16 11:20:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1010 states have (on average 1.3544554455445545) internal successors, (1368), 1028 states have internal predecessors, (1368), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2022-11-16 11:20:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1925 transitions. [2022-11-16 11:20:04,107 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1925 transitions. Word has length 53 [2022-11-16 11:20:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:04,108 INFO L495 AbstractCegarLoop]: Abstraction has 1372 states and 1925 transitions. [2022-11-16 11:20:04,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:20:04,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1925 transitions. [2022-11-16 11:20:04,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:20:04,117 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:04,118 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:04,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:20:04,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:04,119 INFO L85 PathProgramCache]: Analyzing trace with hash -520235721, now seen corresponding path program 1 times [2022-11-16 11:20:04,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:04,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805075265] [2022-11-16 11:20:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:04,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:04,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:04,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556004303] [2022-11-16 11:20:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:04,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:04,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:04,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:20:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:20:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:20:04,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:04,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:04,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805075265] [2022-11-16 11:20:04,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:04,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556004303] [2022-11-16 11:20:04,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556004303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:04,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:04,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:20:04,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734793835] [2022-11-16 11:20:04,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:04,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:20:04,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:04,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:20:04,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:20:04,731 INFO L87 Difference]: Start difference. First operand 1372 states and 1925 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:20:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:04,893 INFO L93 Difference]: Finished difference Result 2730 states and 3831 transitions. [2022-11-16 11:20:04,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:20:04,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-11-16 11:20:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:04,907 INFO L225 Difference]: With dead ends: 2730 [2022-11-16 11:20:04,907 INFO L226 Difference]: Without dead ends: 1372 [2022-11-16 11:20:04,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 53 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 11:20:04,917 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 974 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 974 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:04,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [974 Valid, 995 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:20:04,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2022-11-16 11:20:05,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1372. [2022-11-16 11:20:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1010 states have (on average 1.3534653465346536) internal successors, (1367), 1028 states have internal predecessors, (1367), 279 states have call successors, (279), 83 states have call predecessors, (279), 82 states have return successors, (278), 274 states have call predecessors, (278), 278 states have call successors, (278) [2022-11-16 11:20:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 1924 transitions. [2022-11-16 11:20:05,022 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 1924 transitions. Word has length 55 [2022-11-16 11:20:05,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:05,023 INFO L495 AbstractCegarLoop]: Abstraction has 1372 states and 1924 transitions. [2022-11-16 11:20:05,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:20:05,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 1924 transitions. [2022-11-16 11:20:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:20:05,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:05,029 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:05,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:05,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:05,237 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:05,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:05,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1531352971, now seen corresponding path program 1 times [2022-11-16 11:20:05,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:05,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478436146] [2022-11-16 11:20:05,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:05,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:05,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:05,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740997360] [2022-11-16 11:20:05,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:05,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:05,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:05,284 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:05,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:20:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:05,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 883 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:20:05,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:20:05,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:05,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:05,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478436146] [2022-11-16 11:20:05,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:05,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740997360] [2022-11-16 11:20:05,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740997360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:05,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:05,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:20:05,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798695095] [2022-11-16 11:20:05,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:05,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:20:05,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:05,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:20:05,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:20:05,798 INFO L87 Difference]: Start difference. First operand 1372 states and 1924 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:20:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:06,074 INFO L93 Difference]: Finished difference Result 4085 states and 5810 transitions. [2022-11-16 11:20:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:20:06,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 55 [2022-11-16 11:20:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:06,089 INFO L225 Difference]: With dead ends: 4085 [2022-11-16 11:20:06,089 INFO L226 Difference]: Without dead ends: 2703 [2022-11-16 11:20:06,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:20:06,104 INFO L413 NwaCegarLoop]: 1217 mSDtfsCounter, 978 mSDsluCounter, 3435 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 4652 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:06,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 4652 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:20:06,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2022-11-16 11:20:06,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2695. [2022-11-16 11:20:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2695 states, 1983 states have (on average 1.3550176500252142) internal successors, (2687), 2019 states have internal predecessors, (2687), 547 states have call successors, (547), 165 states have call predecessors, (547), 164 states have return successors, (602), 538 states have call predecessors, (602), 546 states have call successors, (602) [2022-11-16 11:20:06,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2695 states to 2695 states and 3836 transitions. [2022-11-16 11:20:06,265 INFO L78 Accepts]: Start accepts. Automaton has 2695 states and 3836 transitions. Word has length 55 [2022-11-16 11:20:06,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:06,268 INFO L495 AbstractCegarLoop]: Abstraction has 2695 states and 3836 transitions. [2022-11-16 11:20:06,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:20:06,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2695 states and 3836 transitions. [2022-11-16 11:20:06,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-16 11:20:06,275 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:06,276 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:06,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:06,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:06,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:06,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:06,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1177753049, now seen corresponding path program 1 times [2022-11-16 11:20:06,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:06,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701589865] [2022-11-16 11:20:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:06,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:06,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701589865] [2022-11-16 11:20:06,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 11:20:06,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791756843] [2022-11-16 11:20:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:06,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:06,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:06,554 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:06,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:20:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:07,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 1028 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:20:07,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:20:07,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:07,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791756843] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:07,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:07,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:20:07,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692093108] [2022-11-16 11:20:07,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:07,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:20:07,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:07,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:20:07,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:20:07,093 INFO L87 Difference]: Start difference. First operand 2695 states and 3836 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:20:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:07,419 INFO L93 Difference]: Finished difference Result 7655 states and 10865 transitions. [2022-11-16 11:20:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:20:07,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2022-11-16 11:20:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:07,447 INFO L225 Difference]: With dead ends: 7655 [2022-11-16 11:20:07,448 INFO L226 Difference]: Without dead ends: 4974 [2022-11-16 11:20:07,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 87 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 11:20:07,460 INFO L413 NwaCegarLoop]: 1128 mSDtfsCounter, 830 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 2073 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:07,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 2073 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:20:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4974 states. [2022-11-16 11:20:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4974 to 4965. [2022-11-16 11:20:07,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4965 states, 3706 states have (on average 1.3559093362115489) internal successors, (5025), 3767 states have internal predecessors, (5025), 946 states have call successors, (946), 313 states have call predecessors, (946), 312 states have return successors, (1021), 932 states have call predecessors, (1021), 945 states have call successors, (1021) [2022-11-16 11:20:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4965 states to 4965 states and 6992 transitions. [2022-11-16 11:20:07,858 INFO L78 Accepts]: Start accepts. Automaton has 4965 states and 6992 transitions. Word has length 89 [2022-11-16 11:20:07,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:07,859 INFO L495 AbstractCegarLoop]: Abstraction has 4965 states and 6992 transitions. [2022-11-16 11:20:07,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:20:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4965 states and 6992 transitions. [2022-11-16 11:20:07,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-16 11:20:07,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:07,867 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:07,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:08,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:08,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:08,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:08,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1306322781, now seen corresponding path program 1 times [2022-11-16 11:20:08,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:08,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191101434] [2022-11-16 11:20:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:08,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:08,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:08,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191101434] [2022-11-16 11:20:08,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 11:20:08,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302725464] [2022-11-16 11:20:08,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:08,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:08,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:08,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:08,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:20:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:08,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:20:08,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:08,641 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:20:08,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:08,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302725464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:08,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:08,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:20:08,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055582980] [2022-11-16 11:20:08,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:08,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:20:08,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:20:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:20:08,643 INFO L87 Difference]: Start difference. First operand 4965 states and 6992 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 11:20:09,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:09,102 INFO L93 Difference]: Finished difference Result 13617 states and 19128 transitions. [2022-11-16 11:20:09,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:20:09,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 104 [2022-11-16 11:20:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:09,150 INFO L225 Difference]: With dead ends: 13617 [2022-11-16 11:20:09,150 INFO L226 Difference]: Without dead ends: 8666 [2022-11-16 11:20:09,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 102 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 11:20:09,168 INFO L413 NwaCegarLoop]: 1122 mSDtfsCounter, 779 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:09,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [779 Valid, 2065 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:20:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8666 states. [2022-11-16 11:20:09,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8666 to 8637. [2022-11-16 11:20:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8637 states, 6514 states have (on average 1.3533926926619588) internal successors, (8816), 6627 states have internal predecessors, (8816), 1548 states have call successors, (1548), 575 states have call predecessors, (1548), 574 states have return successors, (1683), 1510 states have call predecessors, (1683), 1547 states have call successors, (1683) [2022-11-16 11:20:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8637 states to 8637 states and 12047 transitions. [2022-11-16 11:20:09,695 INFO L78 Accepts]: Start accepts. Automaton has 8637 states and 12047 transitions. Word has length 104 [2022-11-16 11:20:09,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:09,696 INFO L495 AbstractCegarLoop]: Abstraction has 8637 states and 12047 transitions. [2022-11-16 11:20:09,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 11:20:09,697 INFO L276 IsEmpty]: Start isEmpty. Operand 8637 states and 12047 transitions. [2022-11-16 11:20:09,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-16 11:20:09,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:09,712 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:09,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:09,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:09,920 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:09,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash 559024434, now seen corresponding path program 1 times [2022-11-16 11:20:09,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:09,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430994727] [2022-11-16 11:20:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:09,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:10,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:10,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430994727] [2022-11-16 11:20:10,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 11:20:10,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532738735] [2022-11-16 11:20:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:10,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:10,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:10,018 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:10,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:20:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:10,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:20:10,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 11:20:10,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:10,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532738735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:10,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:10,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:20:10,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133879810] [2022-11-16 11:20:10,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:10,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:20:10,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:10,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:20:10,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:20:10,568 INFO L87 Difference]: Start difference. First operand 8637 states and 12047 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 11:20:11,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:11,041 INFO L93 Difference]: Finished difference Result 17276 states and 24107 transitions. [2022-11-16 11:20:11,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:20:11,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2022-11-16 11:20:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:11,112 INFO L225 Difference]: With dead ends: 17276 [2022-11-16 11:20:11,112 INFO L226 Difference]: Without dead ends: 8653 [2022-11-16 11:20:11,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 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 11:20:11,143 INFO L413 NwaCegarLoop]: 1002 mSDtfsCounter, 0 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2000 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:11,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2000 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:20:11,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8653 states. [2022-11-16 11:20:11,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8653 to 8653. [2022-11-16 11:20:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8653 states, 6530 states have (on average 1.3525267993874426) internal successors, (8832), 6643 states have internal predecessors, (8832), 1548 states have call successors, (1548), 575 states have call predecessors, (1548), 574 states have return successors, (1683), 1510 states have call predecessors, (1683), 1547 states have call successors, (1683) [2022-11-16 11:20:11,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8653 states to 8653 states and 12063 transitions. [2022-11-16 11:20:11,709 INFO L78 Accepts]: Start accepts. Automaton has 8653 states and 12063 transitions. Word has length 118 [2022-11-16 11:20:11,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:11,709 INFO L495 AbstractCegarLoop]: Abstraction has 8653 states and 12063 transitions. [2022-11-16 11:20:11,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 11:20:11,710 INFO L276 IsEmpty]: Start isEmpty. Operand 8653 states and 12063 transitions. [2022-11-16 11:20:11,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-16 11:20:11,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:11,719 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:11,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-16 11:20:11,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 11:20:11,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:11,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash 799264180, now seen corresponding path program 1 times [2022-11-16 11:20:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:11,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499669122] [2022-11-16 11:20:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:11,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:12,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:12,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499669122] [2022-11-16 11:20:12,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-16 11:20:12,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205668245] [2022-11-16 11:20:12,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:12,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:12,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:12,018 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:12,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:20:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:12,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:20:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:12,528 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 11:20:12,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:12,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205668245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:12,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:12,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:20:12,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139761756] [2022-11-16 11:20:12,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:12,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:20:12,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:12,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:20:12,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:20:12,530 INFO L87 Difference]: Start difference. First operand 8653 states and 12063 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 11:20:13,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:13,147 INFO L93 Difference]: Finished difference Result 22051 states and 30664 transitions. [2022-11-16 11:20:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:20:13,148 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 118 [2022-11-16 11:20:13,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:13,202 INFO L225 Difference]: With dead ends: 22051 [2022-11-16 11:20:13,202 INFO L226 Difference]: Without dead ends: 13412 [2022-11-16 11:20:13,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 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 11:20:13,228 INFO L413 NwaCegarLoop]: 1351 mSDtfsCounter, 681 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:13,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [681 Valid, 2308 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:20:13,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13412 states. [2022-11-16 11:20:13,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13412 to 13391. [2022-11-16 11:20:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13391 states, 10126 states have (on average 1.3421884258344854) internal successors, (13591), 10300 states have internal predecessors, (13591), 2322 states have call successors, (2322), 943 states have call predecessors, (2322), 942 states have return successors, (2559), 2267 states have call predecessors, (2559), 2321 states have call successors, (2559) [2022-11-16 11:20:13,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13391 states to 13391 states and 18472 transitions. [2022-11-16 11:20:13,962 INFO L78 Accepts]: Start accepts. Automaton has 13391 states and 18472 transitions. Word has length 118 [2022-11-16 11:20:13,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:13,962 INFO L495 AbstractCegarLoop]: Abstraction has 13391 states and 18472 transitions. [2022-11-16 11:20:13,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 11:20:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 13391 states and 18472 transitions. [2022-11-16 11:20:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-16 11:20:13,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:13,975 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:13,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:14,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:14,184 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:14,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash -382360909, now seen corresponding path program 1 times [2022-11-16 11:20:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:14,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463791932] [2022-11-16 11:20:14,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:14,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:14,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:14,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855371881] [2022-11-16 11:20:14,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:14,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:14,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:14,307 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:14,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:20:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:14,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:20:14,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-16 11:20:14,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:14,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463791932] [2022-11-16 11:20:14,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855371881] [2022-11-16 11:20:14,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855371881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:14,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:14,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:20:14,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476182086] [2022-11-16 11:20:14,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:14,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:20:14,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:14,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:20:14,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:20:14,877 INFO L87 Difference]: Start difference. First operand 13391 states and 18472 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-16 11:20:16,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:16,018 INFO L93 Difference]: Finished difference Result 34193 states and 47122 transitions. [2022-11-16 11:20:16,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:20:16,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 123 [2022-11-16 11:20:16,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:16,098 INFO L225 Difference]: With dead ends: 34193 [2022-11-16 11:20:16,098 INFO L226 Difference]: Without dead ends: 20827 [2022-11-16 11:20:16,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 11:20:16,133 INFO L413 NwaCegarLoop]: 1140 mSDtfsCounter, 944 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 944 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:16,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [944 Valid, 2064 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:20:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20827 states. [2022-11-16 11:20:17,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20827 to 20814. [2022-11-16 11:20:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20814 states, 15694 states have (on average 1.3384095832802345) internal successors, (21005), 15981 states have internal predecessors, (21005), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1508 states have return successors, (3956), 3523 states have call predecessors, (3956), 3610 states have call successors, (3956) [2022-11-16 11:20:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20814 states to 20814 states and 28572 transitions. [2022-11-16 11:20:17,141 INFO L78 Accepts]: Start accepts. Automaton has 20814 states and 28572 transitions. Word has length 123 [2022-11-16 11:20:17,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:17,142 INFO L495 AbstractCegarLoop]: Abstraction has 20814 states and 28572 transitions. [2022-11-16 11:20:17,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-16 11:20:17,143 INFO L276 IsEmpty]: Start isEmpty. Operand 20814 states and 28572 transitions. [2022-11-16 11:20:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-16 11:20:17,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:17,156 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:17,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:17,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:17,364 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:17,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:17,364 INFO L85 PathProgramCache]: Analyzing trace with hash -272803969, now seen corresponding path program 1 times [2022-11-16 11:20:17,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:17,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976022341] [2022-11-16 11:20:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:17,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:17,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:17,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880079015] [2022-11-16 11:20:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:17,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:17,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:17,407 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:17,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:20:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:20:17,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-11-16 11:20:17,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:17,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:17,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976022341] [2022-11-16 11:20:17,896 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:17,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880079015] [2022-11-16 11:20:17,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880079015] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:17,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:17,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:20:17,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205905008] [2022-11-16 11:20:17,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:17,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:20:17,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:17,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:20:17,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:20:17,901 INFO L87 Difference]: Start difference. First operand 20814 states and 28572 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 11:20:18,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:18,680 INFO L93 Difference]: Finished difference Result 31470 states and 43627 transitions. [2022-11-16 11:20:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:20:18,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 123 [2022-11-16 11:20:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:18,763 INFO L225 Difference]: With dead ends: 31470 [2022-11-16 11:20:18,764 INFO L226 Difference]: Without dead ends: 20902 [2022-11-16 11:20:18,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 11:20:18,797 INFO L413 NwaCegarLoop]: 1002 mSDtfsCounter, 5 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1996 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:18,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1996 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:20:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20902 states. [2022-11-16 11:20:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20902 to 20902. [2022-11-16 11:20:20,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20902 states, 15760 states have (on average 1.336992385786802) internal successors, (21071), 16069 states have internal predecessors, (21071), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1530 states have return successors, (3998), 3523 states have call predecessors, (3998), 3610 states have call successors, (3998) [2022-11-16 11:20:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20902 states to 20902 states and 28680 transitions. [2022-11-16 11:20:20,178 INFO L78 Accepts]: Start accepts. Automaton has 20902 states and 28680 transitions. Word has length 123 [2022-11-16 11:20:20,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:20,178 INFO L495 AbstractCegarLoop]: Abstraction has 20902 states and 28680 transitions. [2022-11-16 11:20:20,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 11:20:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 20902 states and 28680 transitions. [2022-11-16 11:20:20,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-16 11:20:20,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:20,194 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:20,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:20,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:20,402 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:20,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:20,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1940341376, now seen corresponding path program 1 times [2022-11-16 11:20:20,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:20,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412582580] [2022-11-16 11:20:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:20,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:20,444 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:20,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342332494] [2022-11-16 11:20:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:20,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:20,446 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:20,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:20:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:20,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 1186 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:20:20,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:20:20,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:20,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:20,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412582580] [2022-11-16 11:20:20,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:20,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342332494] [2022-11-16 11:20:20,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342332494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:20,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:20,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:20:20,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887607969] [2022-11-16 11:20:20,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:20,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:20:20,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:20:20,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:20:20,945 INFO L87 Difference]: Start difference. First operand 20902 states and 28680 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 11:20:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:22,077 INFO L93 Difference]: Finished difference Result 41857 states and 57443 transitions. [2022-11-16 11:20:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:20:22,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 125 [2022-11-16 11:20:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:22,148 INFO L225 Difference]: With dead ends: 41857 [2022-11-16 11:20:22,149 INFO L226 Difference]: Without dead ends: 20944 [2022-11-16 11:20:22,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:20:22,187 INFO L413 NwaCegarLoop]: 1005 mSDtfsCounter, 12 mSDsluCounter, 1998 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 3003 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:22,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 3003 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:20:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20944 states. [2022-11-16 11:20:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20944 to 20905. [2022-11-16 11:20:23,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20905 states, 15763 states have (on average 1.3361669732918862) internal successors, (21062), 16072 states have internal predecessors, (21062), 3611 states have call successors, (3611), 1509 states have call predecessors, (3611), 1530 states have return successors, (3998), 3523 states have call predecessors, (3998), 3610 states have call successors, (3998) [2022-11-16 11:20:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20905 states to 20905 states and 28671 transitions. [2022-11-16 11:20:23,086 INFO L78 Accepts]: Start accepts. Automaton has 20905 states and 28671 transitions. Word has length 125 [2022-11-16 11:20:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:23,087 INFO L495 AbstractCegarLoop]: Abstraction has 20905 states and 28671 transitions. [2022-11-16 11:20:23,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2022-11-16 11:20:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 20905 states and 28671 transitions. [2022-11-16 11:20:23,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-16 11:20:23,099 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:23,099 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:23,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:23,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:20:23,306 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:23,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:23,307 INFO L85 PathProgramCache]: Analyzing trace with hash -755194514, now seen corresponding path program 1 times [2022-11-16 11:20:23,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:23,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319317324] [2022-11-16 11:20:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:23,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:23,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:23,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1468752759] [2022-11-16 11:20:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:23,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:23,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:23,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:23,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 11:20:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:23,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:20:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-16 11:20:24,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:24,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:24,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319317324] [2022-11-16 11:20:24,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:24,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468752759] [2022-11-16 11:20:24,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468752759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:24,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:24,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:20:24,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476915250] [2022-11-16 11:20:24,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:24,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:20:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:24,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:20:24,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:20:24,134 INFO L87 Difference]: Start difference. First operand 20905 states and 28671 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-16 11:20:27,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:27,652 INFO L93 Difference]: Finished difference Result 43005 states and 59410 transitions. [2022-11-16 11:20:27,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:20:27,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 126 [2022-11-16 11:20:27,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:27,756 INFO L225 Difference]: With dead ends: 43005 [2022-11-16 11:20:27,756 INFO L226 Difference]: Without dead ends: 22125 [2022-11-16 11:20:27,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:20:27,812 INFO L413 NwaCegarLoop]: 793 mSDtfsCounter, 1310 mSDsluCounter, 2218 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 3011 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:27,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1420 Valid, 3011 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-16 11:20:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22125 states. [2022-11-16 11:20:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22125 to 21267. [2022-11-16 11:20:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21267 states, 15979 states have (on average 1.3294949621378058) internal successors, (21244), 16286 states have internal predecessors, (21244), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-11-16 11:20:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21267 states to 21267 states and 28897 transitions. [2022-11-16 11:20:28,947 INFO L78 Accepts]: Start accepts. Automaton has 21267 states and 28897 transitions. Word has length 126 [2022-11-16 11:20:28,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:28,948 INFO L495 AbstractCegarLoop]: Abstraction has 21267 states and 28897 transitions. [2022-11-16 11:20:28,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 4 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-11-16 11:20:28,948 INFO L276 IsEmpty]: Start isEmpty. Operand 21267 states and 28897 transitions. [2022-11-16 11:20:28,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-11-16 11:20:28,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:28,960 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:28,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:29,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-16 11:20:29,168 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:29,169 INFO L85 PathProgramCache]: Analyzing trace with hash -826426938, now seen corresponding path program 1 times [2022-11-16 11:20:29,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:29,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580664209] [2022-11-16 11:20:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:29,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:29,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:29,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835757236] [2022-11-16 11:20:29,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:29,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:29,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:29,203 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:29,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 11:20:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:20:29,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:20:29,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:29,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:29,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580664209] [2022-11-16 11:20:29,907 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:29,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835757236] [2022-11-16 11:20:29,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835757236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:29,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:29,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:20:29,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830002699] [2022-11-16 11:20:29,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:29,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:20:29,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:29,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:20:29,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:20:29,910 INFO L87 Difference]: Start difference. First operand 21267 states and 28897 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:20:31,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:31,509 INFO L93 Difference]: Finished difference Result 21484 states and 29191 transitions. [2022-11-16 11:20:31,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:20:31,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 135 [2022-11-16 11:20:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:31,613 INFO L225 Difference]: With dead ends: 21484 [2022-11-16 11:20:31,614 INFO L226 Difference]: Without dead ends: 21435 [2022-11-16 11:20:31,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 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 11:20:31,629 INFO L413 NwaCegarLoop]: 993 mSDtfsCounter, 945 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:31,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 1691 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:20:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21435 states. [2022-11-16 11:20:32,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21435 to 21279. [2022-11-16 11:20:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21279 states, 15991 states have (on average 1.3292477018322806) internal successors, (21256), 16298 states have internal predecessors, (21256), 3707 states have call successors, (3707), 1509 states have call predecessors, (3707), 1580 states have return successors, (3946), 3671 states have call predecessors, (3946), 3706 states have call successors, (3946) [2022-11-16 11:20:32,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21279 states to 21279 states and 28909 transitions. [2022-11-16 11:20:32,659 INFO L78 Accepts]: Start accepts. Automaton has 21279 states and 28909 transitions. Word has length 135 [2022-11-16 11:20:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:32,660 INFO L495 AbstractCegarLoop]: Abstraction has 21279 states and 28909 transitions. [2022-11-16 11:20:32,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:20:32,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21279 states and 28909 transitions. [2022-11-16 11:20:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-16 11:20:32,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:32,680 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:32,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:32,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-16 11:20:32,888 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:32,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2087140266, now seen corresponding path program 1 times [2022-11-16 11:20:32,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:32,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578198330] [2022-11-16 11:20:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:32,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:32,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:32,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9347075] [2022-11-16 11:20:32,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:32,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:32,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:32,947 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:32,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 11:20:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:33,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:20:33,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:33,567 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-16 11:20:33,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:33,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578198330] [2022-11-16 11:20:33,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:33,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9347075] [2022-11-16 11:20:33,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9347075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:33,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:33,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:20:33,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890326504] [2022-11-16 11:20:33,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:33,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:20:33,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:33,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:20:33,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:20:33,571 INFO L87 Difference]: Start difference. First operand 21279 states and 28909 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-16 11:20:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:34,223 INFO L93 Difference]: Finished difference Result 31944 states and 43424 transitions. [2022-11-16 11:20:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:20:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 137 [2022-11-16 11:20:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:34,266 INFO L225 Difference]: With dead ends: 31944 [2022-11-16 11:20:34,266 INFO L226 Difference]: Without dead ends: 10309 [2022-11-16 11:20:34,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 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 11:20:34,317 INFO L413 NwaCegarLoop]: 1121 mSDtfsCounter, 899 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:34,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 1279 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:20:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10309 states. [2022-11-16 11:20:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10309 to 10309. [2022-11-16 11:20:34,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10309 states, 7724 states have (on average 1.3256084930088037) internal successors, (10239), 7880 states have internal predecessors, (10239), 1812 states have call successors, (1812), 737 states have call predecessors, (1812), 772 states have return successors, (1931), 1788 states have call predecessors, (1931), 1811 states have call successors, (1931) [2022-11-16 11:20:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10309 states to 10309 states and 13982 transitions. [2022-11-16 11:20:34,983 INFO L78 Accepts]: Start accepts. Automaton has 10309 states and 13982 transitions. Word has length 137 [2022-11-16 11:20:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:34,983 INFO L495 AbstractCegarLoop]: Abstraction has 10309 states and 13982 transitions. [2022-11-16 11:20:34,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-11-16 11:20:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 10309 states and 13982 transitions. [2022-11-16 11:20:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-11-16 11:20:34,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:34,994 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:35,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:35,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:35,203 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:35,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1012199750, now seen corresponding path program 1 times [2022-11-16 11:20:35,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:35,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013684386] [2022-11-16 11:20:35,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:35,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:35,251 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:35,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492175008] [2022-11-16 11:20:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:35,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:35,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:35,253 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:35,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 11:20:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:35,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:20:35,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:20:35,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:36,142 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:20:36,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:36,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013684386] [2022-11-16 11:20:36,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:36,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492175008] [2022-11-16 11:20:36,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492175008] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:36,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:36,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-16 11:20:36,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165624597] [2022-11-16 11:20:36,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:36,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:20:36,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:36,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:20:36,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:20:36,145 INFO L87 Difference]: Start difference. First operand 10309 states and 13982 transitions. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-16 11:20:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:37,428 INFO L93 Difference]: Finished difference Result 10862 states and 14768 transitions. [2022-11-16 11:20:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:20:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 137 [2022-11-16 11:20:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:37,468 INFO L225 Difference]: With dead ends: 10862 [2022-11-16 11:20:37,468 INFO L226 Difference]: Without dead ends: 10813 [2022-11-16 11:20:37,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 266 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 11:20:37,476 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 1713 mSDsluCounter, 1402 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1721 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:37,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1721 Valid, 2388 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:20:37,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10813 states. [2022-11-16 11:20:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10813 to 10813. [2022-11-16 11:20:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10813 states, 8102 states have (on average 1.319303875586275) internal successors, (10689), 8276 states have internal predecessors, (10689), 1938 states have call successors, (1938), 737 states have call predecessors, (1938), 772 states have return successors, (2057), 1896 states have call predecessors, (2057), 1937 states have call successors, (2057) [2022-11-16 11:20:38,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10813 states to 10813 states and 14684 transitions. [2022-11-16 11:20:38,312 INFO L78 Accepts]: Start accepts. Automaton has 10813 states and 14684 transitions. Word has length 137 [2022-11-16 11:20:38,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:38,313 INFO L495 AbstractCegarLoop]: Abstraction has 10813 states and 14684 transitions. [2022-11-16 11:20:38,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-16 11:20:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand 10813 states and 14684 transitions. [2022-11-16 11:20:38,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-16 11:20:38,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:38,333 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:38,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:38,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:38,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:38,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:38,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1707539993, now seen corresponding path program 1 times [2022-11-16 11:20:38,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:38,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949990926] [2022-11-16 11:20:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:38,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:38,611 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:38,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549388979] [2022-11-16 11:20:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:38,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:38,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:38,613 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:38,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 11:20:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1293 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:20:39,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:20:39,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:20:39,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:39,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949990926] [2022-11-16 11:20:39,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:39,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549388979] [2022-11-16 11:20:39,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549388979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:39,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:39,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-16 11:20:39,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901908352] [2022-11-16 11:20:39,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:39,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:20:39,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:20:39,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:20:39,638 INFO L87 Difference]: Start difference. First operand 10813 states and 14684 transitions. Second operand has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 14 states have internal predecessors, (167), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-16 11:20:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:41,218 INFO L93 Difference]: Finished difference Result 11870 states and 16208 transitions. [2022-11-16 11:20:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:20:41,219 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 14 states have internal predecessors, (167), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 146 [2022-11-16 11:20:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:41,252 INFO L225 Difference]: With dead ends: 11870 [2022-11-16 11:20:41,252 INFO L226 Difference]: Without dead ends: 11821 [2022-11-16 11:20:41,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 278 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 11:20:41,261 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 1256 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1276 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:41,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1276 Valid, 2476 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:20:41,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11821 states. [2022-11-16 11:20:41,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11821 to 11821. [2022-11-16 11:20:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11821 states, 8858 states have (on average 1.3083088733348385) internal successors, (11589), 9068 states have internal predecessors, (11589), 2190 states have call successors, (2190), 737 states have call predecessors, (2190), 772 states have return successors, (2309), 2112 states have call predecessors, (2309), 2189 states have call successors, (2309) [2022-11-16 11:20:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11821 states to 11821 states and 16088 transitions. [2022-11-16 11:20:41,806 INFO L78 Accepts]: Start accepts. Automaton has 11821 states and 16088 transitions. Word has length 146 [2022-11-16 11:20:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:41,806 INFO L495 AbstractCegarLoop]: Abstraction has 11821 states and 16088 transitions. [2022-11-16 11:20:41,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.928571428571429) internal successors, (167), 14 states have internal predecessors, (167), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-16 11:20:41,807 INFO L276 IsEmpty]: Start isEmpty. Operand 11821 states and 16088 transitions. [2022-11-16 11:20:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-16 11:20:41,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:41,830 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:41,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:42,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-16 11:20:42,038 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1109715140, now seen corresponding path program 1 times [2022-11-16 11:20:42,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:42,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880701903] [2022-11-16 11:20:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:42,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:42,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:42,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710306800] [2022-11-16 11:20:42,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:42,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:42,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:42,093 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:42,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 11:20:42,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:42,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:20:42,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:20:43,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:20:43,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:43,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880701903] [2022-11-16 11:20:43,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:43,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710306800] [2022-11-16 11:20:43,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710306800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:43,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:43,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2022-11-16 11:20:43,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075698415] [2022-11-16 11:20:43,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:43,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-16 11:20:43,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:43,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-16 11:20:43,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-11-16 11:20:43,488 INFO L87 Difference]: Start difference. First operand 11821 states and 16088 transitions. Second operand has 26 states, 26 states have (on average 8.653846153846153) internal successors, (225), 26 states have internal predecessors, (225), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-16 11:20:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:45,292 INFO L93 Difference]: Finished difference Result 13886 states and 19088 transitions. [2022-11-16 11:20:45,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:20:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 8.653846153846153) internal successors, (225), 26 states have internal predecessors, (225), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) Word has length 175 [2022-11-16 11:20:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:45,324 INFO L225 Difference]: With dead ends: 13886 [2022-11-16 11:20:45,324 INFO L226 Difference]: Without dead ends: 13837 [2022-11-16 11:20:45,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 324 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 11:20:45,334 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 1713 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1757 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:45,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1757 Valid, 2683 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1032 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:20:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13837 states. [2022-11-16 11:20:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13837 to 13837. [2022-11-16 11:20:45,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13837 states, 10370 states have (on average 1.2911282545805207) internal successors, (13389), 10652 states have internal predecessors, (13389), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 772 states have return successors, (2813), 2544 states have call predecessors, (2813), 2693 states have call successors, (2813) [2022-11-16 11:20:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13837 states to 13837 states and 18896 transitions. [2022-11-16 11:20:46,001 INFO L78 Accepts]: Start accepts. Automaton has 13837 states and 18896 transitions. Word has length 175 [2022-11-16 11:20:46,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:46,002 INFO L495 AbstractCegarLoop]: Abstraction has 13837 states and 18896 transitions. [2022-11-16 11:20:46,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 8.653846153846153) internal successors, (225), 26 states have internal predecessors, (225), 4 states have call successors, (29), 3 states have call predecessors, (29), 3 states have return successors, (28), 4 states have call predecessors, (28), 4 states have call successors, (28) [2022-11-16 11:20:46,002 INFO L276 IsEmpty]: Start isEmpty. Operand 13837 states and 18896 transitions. [2022-11-16 11:20:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-11-16 11:20:46,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:46,029 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:46,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:46,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 11:20:46,237 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:46,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1460128208, now seen corresponding path program 2 times [2022-11-16 11:20:46,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:46,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44986170] [2022-11-16 11:20:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:46,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:46,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:46,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1830680753] [2022-11-16 11:20:46,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:20:46,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:46,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:46,286 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:46,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 11:20:46,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:20:46,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:20:46,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-16 11:20:46,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 1077 trivial. 0 not checked. [2022-11-16 11:20:46,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:20:46,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44986170] [2022-11-16 11:20:46,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830680753] [2022-11-16 11:20:46,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830680753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:20:46,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:20:46,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:20:46,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539170520] [2022-11-16 11:20:46,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:20:46,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:20:46,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:20:46,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:20:46,767 INFO L87 Difference]: Start difference. First operand 13837 states and 18896 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:20:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:47,513 INFO L93 Difference]: Finished difference Result 27662 states and 38013 transitions. [2022-11-16 11:20:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:20:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 223 [2022-11-16 11:20:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:47,550 INFO L225 Difference]: With dead ends: 27662 [2022-11-16 11:20:47,550 INFO L226 Difference]: Without dead ends: 13959 [2022-11-16 11:20:47,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:20:47,584 INFO L413 NwaCegarLoop]: 998 mSDtfsCounter, 2 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3977 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:47,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 3977 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:20:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13959 states. [2022-11-16 11:20:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13959 to 13917. [2022-11-16 11:20:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13917 states, 10430 states have (on average 1.2894534995206137) internal successors, (13449), 10712 states have internal predecessors, (13449), 2694 states have call successors, (2694), 737 states have call predecessors, (2694), 792 states have return successors, (2842), 2564 states have call predecessors, (2842), 2693 states have call successors, (2842) [2022-11-16 11:20:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13917 states to 13917 states and 18985 transitions. [2022-11-16 11:20:48,258 INFO L78 Accepts]: Start accepts. Automaton has 13917 states and 18985 transitions. Word has length 223 [2022-11-16 11:20:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:48,258 INFO L495 AbstractCegarLoop]: Abstraction has 13917 states and 18985 transitions. [2022-11-16 11:20:48,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-11-16 11:20:48,259 INFO L276 IsEmpty]: Start isEmpty. Operand 13917 states and 18985 transitions. [2022-11-16 11:20:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-11-16 11:20:48,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:48,291 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:20:48,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:48,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 11:20:48,498 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:48,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1384376787, now seen corresponding path program 1 times [2022-11-16 11:20:48,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:48,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636923973] [2022-11-16 11:20:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:48,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:48,541 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:48,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024375055] [2022-11-16 11:20:48,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:48,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:48,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:48,543 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:48,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 11:20:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:49,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 1497 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 11:20:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:20:49,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:20:50,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1101 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:20:50,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:20:50,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636923973] [2022-11-16 11:20:50,882 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:20:50,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024375055] [2022-11-16 11:20:50,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024375055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:20:50,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:20:50,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2022-11-16 11:20:50,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400967374] [2022-11-16 11:20:50,883 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:20:50,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-16 11:20:50,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:20:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-16 11:20:50,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:20:50,886 INFO L87 Difference]: Start difference. First operand 13917 states and 18985 transitions. Second operand has 50 states, 50 states have (on average 6.46) internal successors, (323), 50 states have internal predecessors, (323), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-16 11:20:54,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:20:54,803 INFO L93 Difference]: Finished difference Result 17998 states and 24937 transitions. [2022-11-16 11:20:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-16 11:20:54,803 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.46) internal successors, (323), 50 states have internal predecessors, (323), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 225 [2022-11-16 11:20:54,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:20:54,849 INFO L225 Difference]: With dead ends: 17998 [2022-11-16 11:20:54,849 INFO L226 Difference]: Without dead ends: 17949 [2022-11-16 11:20:54,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 11:20:54,856 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 2520 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2612 SdHoareTripleChecker+Valid, 3069 SdHoareTripleChecker+Invalid, 2339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 827 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:20:54,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2612 Valid, 3069 Invalid, 2339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [827 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 11:20:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17949 states. [2022-11-16 11:20:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17949 to 17949. [2022-11-16 11:20:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17949 states, 13454 states have (on average 1.2672067786531886) internal successors, (17049), 13880 states have internal predecessors, (17049), 3702 states have call successors, (3702), 737 states have call predecessors, (3702), 792 states have return successors, (3850), 3428 states have call predecessors, (3850), 3701 states have call successors, (3850) [2022-11-16 11:20:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17949 states to 17949 states and 24601 transitions. [2022-11-16 11:20:55,782 INFO L78 Accepts]: Start accepts. Automaton has 17949 states and 24601 transitions. Word has length 225 [2022-11-16 11:20:55,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:20:55,783 INFO L495 AbstractCegarLoop]: Abstraction has 17949 states and 24601 transitions. [2022-11-16 11:20:55,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.46) internal successors, (323), 50 states have internal predecessors, (323), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-16 11:20:55,783 INFO L276 IsEmpty]: Start isEmpty. Operand 17949 states and 24601 transitions. [2022-11-16 11:20:55,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-11-16 11:20:55,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:20:55,819 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:20:55,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 11:20:56,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 11:20:56,020 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:20:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:20:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1046721002, now seen corresponding path program 1 times [2022-11-16 11:20:56,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:20:56,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487787180] [2022-11-16 11:20:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:56,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:20:56,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:20:56,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983804575] [2022-11-16 11:20:56,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:20:56,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:20:56,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:20:56,077 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:20:56,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 11:20:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:20:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 11:20:56,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:20:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4341 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:20:58,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4341 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:21:01,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:21:01,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487787180] [2022-11-16 11:21:01,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:21:01,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983804575] [2022-11-16 11:21:01,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983804575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:01,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:01,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50] total 98 [2022-11-16 11:21:01,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443505785] [2022-11-16 11:21:01,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:01,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-16 11:21:01,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:21:01,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-16 11:21:01,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-11-16 11:21:01,495 INFO L87 Difference]: Start difference. First operand 17949 states and 24601 transitions. Second operand has 98 states, 98 states have (on average 5.357142857142857) internal successors, (525), 98 states have internal predecessors, (525), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-16 11:21:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:21:12,167 INFO L93 Difference]: Finished difference Result 26062 states and 36457 transitions. [2022-11-16 11:21:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-11-16 11:21:12,168 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.357142857142857) internal successors, (525), 98 states have internal predecessors, (525), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 326 [2022-11-16 11:21:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:21:12,227 INFO L225 Difference]: With dead ends: 26062 [2022-11-16 11:21:12,227 INFO L226 Difference]: Without dead ends: 26013 [2022-11-16 11:21:12,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-11-16 11:21:12,242 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 3768 mSDsluCounter, 5133 mSDsCounter, 0 mSdLazyCounter, 3859 mSolverCounterSat, 1389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3956 SdHoareTripleChecker+Valid, 6119 SdHoareTripleChecker+Invalid, 5248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1389 IncrementalHoareTripleChecker+Valid, 3859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:21:12,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3956 Valid, 6119 Invalid, 5248 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1389 Valid, 3859 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-16 11:21:12,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26013 states. [2022-11-16 11:21:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26013 to 26013. [2022-11-16 11:21:13,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26013 states, 19502 states have (on average 1.2434109322120808) internal successors, (24249), 20216 states have internal predecessors, (24249), 5718 states have call successors, (5718), 737 states have call predecessors, (5718), 792 states have return successors, (5866), 5156 states have call predecessors, (5866), 5717 states have call successors, (5866) [2022-11-16 11:21:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26013 states to 26013 states and 35833 transitions. [2022-11-16 11:21:13,617 INFO L78 Accepts]: Start accepts. Automaton has 26013 states and 35833 transitions. Word has length 326 [2022-11-16 11:21:13,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:21:13,618 INFO L495 AbstractCegarLoop]: Abstraction has 26013 states and 35833 transitions. [2022-11-16 11:21:13,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.357142857142857) internal successors, (525), 98 states have internal predecessors, (525), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-16 11:21:13,618 INFO L276 IsEmpty]: Start isEmpty. Operand 26013 states and 35833 transitions. [2022-11-16 11:21:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2022-11-16 11:21:13,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:21:13,671 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:21:13,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:21:13,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:13,875 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:21:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:21:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash 55124597, now seen corresponding path program 1 times [2022-11-16 11:21:13,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:21:13,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363604015] [2022-11-16 11:21:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:13,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:21:13,952 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:21:13,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386354230] [2022-11-16 11:21:13,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:21:13,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:21:13,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:21:13,964 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:21:13,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 11:21:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:21:14,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2151 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 11:21:14,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:21:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17733 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:21:20,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:21:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17733 backedges. 0 proven. 17578 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-16 11:21:29,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:21:29,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363604015] [2022-11-16 11:21:29,874 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:21:29,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386354230] [2022-11-16 11:21:29,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386354230] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:21:29,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:21:29,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 98] total 194 [2022-11-16 11:21:29,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35452242] [2022-11-16 11:21:29,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:21:29,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-11-16 11:21:29,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:21:29,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-11-16 11:21:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18531, Invalid=18911, Unknown=0, NotChecked=0, Total=37442 [2022-11-16 11:21:29,892 INFO L87 Difference]: Start difference. First operand 26013 states and 35833 transitions. Second operand has 194 states, 194 states have (on average 4.664948453608248) internal successors, (905), 194 states have internal predecessors, (905), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-16 11:22:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:34,269 INFO L93 Difference]: Finished difference Result 42190 states and 59497 transitions. [2022-11-16 11:22:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-11-16 11:22:34,270 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 194 states have (on average 4.664948453608248) internal successors, (905), 194 states have internal predecessors, (905), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) Word has length 516 [2022-11-16 11:22:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:34,372 INFO L225 Difference]: With dead ends: 42190 [2022-11-16 11:22:34,372 INFO L226 Difference]: Without dead ends: 42141 [2022-11-16 11:22:34,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1125 GetRequests, 838 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18145 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=36961, Invalid=46271, Unknown=0, NotChecked=0, Total=83232 [2022-11-16 11:22:34,399 INFO L413 NwaCegarLoop]: 986 mSDtfsCounter, 7080 mSDsluCounter, 8162 mSDsCounter, 0 mSdLazyCounter, 6877 mSolverCounterSat, 3571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7460 SdHoareTripleChecker+Valid, 9148 SdHoareTripleChecker+Invalid, 10448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3571 IncrementalHoareTripleChecker+Valid, 6877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:34,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7460 Valid, 9148 Invalid, 10448 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3571 Valid, 6877 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-16 11:22:34,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42141 states. [2022-11-16 11:22:36,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42141 to 42141. [2022-11-16 11:22:36,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42141 states, 31598 states have (on average 1.2231470346224445) internal successors, (38649), 32888 states have internal predecessors, (38649), 9750 states have call successors, (9750), 737 states have call predecessors, (9750), 792 states have return successors, (9898), 8612 states have call predecessors, (9898), 9749 states have call successors, (9898) [2022-11-16 11:22:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42141 states to 42141 states and 58297 transitions. [2022-11-16 11:22:36,823 INFO L78 Accepts]: Start accepts. Automaton has 42141 states and 58297 transitions. Word has length 516 [2022-11-16 11:22:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:36,824 INFO L495 AbstractCegarLoop]: Abstraction has 42141 states and 58297 transitions. [2022-11-16 11:22:36,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 194 states have (on average 4.664948453608248) internal successors, (905), 194 states have internal predecessors, (905), 4 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 4 states have call predecessors, (30), 4 states have call successors, (30) [2022-11-16 11:22:36,824 INFO L276 IsEmpty]: Start isEmpty. Operand 42141 states and 58297 transitions. [2022-11-16 11:22:36,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 898 [2022-11-16 11:22:36,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:36,933 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:22:36,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:37,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:37,134 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:22:37,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:37,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1478527877, now seen corresponding path program 2 times [2022-11-16 11:22:37,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:22:37,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232439191] [2022-11-16 11:22:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:37,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:22:37,212 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:22:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [888616251] [2022-11-16 11:22:37,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:37,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:37,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:22:37,214 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:22:37,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 11:22:37,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:37,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:37,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-16 11:22:37,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 72165 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 72141 trivial. 0 not checked. [2022-11-16 11:22:38,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:38,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:22:38,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232439191] [2022-11-16 11:22:38,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:22:38,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888616251] [2022-11-16 11:22:38,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888616251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:38,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:38,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-16 11:22:38,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442910230] [2022-11-16 11:22:38,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:38,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:22:38,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:38,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:22:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:22:38,246 INFO L87 Difference]: Start difference. First operand 42141 states and 58297 transitions. Second operand has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 11:22:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:41,642 INFO L93 Difference]: Finished difference Result 84426 states and 116955 transitions. [2022-11-16 11:22:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:22:41,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 897 [2022-11-16 11:22:41,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:41,751 INFO L225 Difference]: With dead ends: 84426 [2022-11-16 11:22:41,751 INFO L226 Difference]: Without dead ends: 42419 [2022-11-16 11:22:41,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 884 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:22:41,810 INFO L413 NwaCegarLoop]: 1022 mSDtfsCounter, 20 mSDsluCounter, 13185 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 14207 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:41,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 14207 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:22:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42419 states. [2022-11-16 11:22:44,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42419 to 42253. [2022-11-16 11:22:44,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42253 states, 31678 states have (on average 1.2216996022476165) internal successors, (38701), 32968 states have internal predecessors, (38701), 9750 states have call successors, (9750), 737 states have call predecessors, (9750), 824 states have return successors, (9954), 8644 states have call predecessors, (9954), 9749 states have call successors, (9954) [2022-11-16 11:22:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42253 states to 42253 states and 58405 transitions. [2022-11-16 11:22:44,575 INFO L78 Accepts]: Start accepts. Automaton has 42253 states and 58405 transitions. Word has length 897 [2022-11-16 11:22:44,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:22:44,576 INFO L495 AbstractCegarLoop]: Abstraction has 42253 states and 58405 transitions. [2022-11-16 11:22:44,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.142857142857143) internal successors, (86), 11 states have internal predecessors, (86), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 11:22:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 42253 states and 58405 transitions. [2022-11-16 11:22:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 903 [2022-11-16 11:22:44,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:22:44,681 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 9, 9, 8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:22:44,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:22:44,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-16 11:22:44,881 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:22:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:22:44,882 INFO L85 PathProgramCache]: Analyzing trace with hash -24591014, now seen corresponding path program 2 times [2022-11-16 11:22:44,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:22:44,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157028422] [2022-11-16 11:22:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:22:44,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:22:45,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-16 11:22:45,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802673498] [2022-11-16 11:22:45,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:22:45,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:22:45,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:22:45,007 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:22:45,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d12ac3c1-63ed-4774-adb4-f293fce88864/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 11:22:45,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:22:45,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:22:45,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 762 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-16 11:22:45,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:22:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 72165 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 72141 trivial. 0 not checked. [2022-11-16 11:22:46,141 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:22:46,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:22:46,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157028422] [2022-11-16 11:22:46,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-16 11:22:46,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802673498] [2022-11-16 11:22:46,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802673498] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:22:46,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:22:46,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-16 11:22:46,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909937574] [2022-11-16 11:22:46,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:22:46,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:22:46,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:22:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:22:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-11-16 11:22:46,144 INFO L87 Difference]: Start difference. First operand 42253 states and 58405 transitions. Second operand has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-16 11:22:48,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:22:48,900 INFO L93 Difference]: Finished difference Result 84570 states and 116955 transitions. [2022-11-16 11:22:48,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:22:48,903 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.5) internal successors, (91), 11 states have internal predecessors, (91), 3 states have call successors, (16), 2 states have call predecessors, (16), 6 states have return successors, (15), 6 states have call predecessors, (15), 3 states have call successors, (15) Word has length 902 [2022-11-16 11:22:48,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:22:49,005 INFO L225 Difference]: With dead ends: 84570 [2022-11-16 11:22:49,005 INFO L226 Difference]: Without dead ends: 42451 [2022-11-16 11:22:49,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 889 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:22:49,064 INFO L413 NwaCegarLoop]: 1021 mSDtfsCounter, 22 mSDsluCounter, 12156 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13177 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:22:49,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 13177 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:22:49,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42451 states.