./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9492eb5ff634b400a7a5ea3f7f2cefeb5465f9e5361bb81d240cec0c0c035af --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:31:14,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:31:14,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:31:15,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:31:15,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:31:15,002 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:31:15,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:31:15,009 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:31:15,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:31:15,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:31:15,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:31:15,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:31:15,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:31:15,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:31:15,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:31:15,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:31:15,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:31:15,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:31:15,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:31:15,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:31:15,047 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:31:15,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:31:15,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:31:15,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:31:15,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:31:15,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:31:15,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:31:15,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:31:15,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:31:15,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:31:15,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:31:15,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:31:15,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:31:15,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:31:15,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:31:15,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:31:15,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:31:15,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:31:15,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:31:15,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:31:15,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:31:15,088 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:31:15,136 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:31:15,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:31:15,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:31:15,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:31:15,139 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:31:15,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:31:15,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:31:15,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:31:15,140 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:31:15,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:31:15,142 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:31:15,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:31:15,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:31:15,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:31:15,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:31:15,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:31:15,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:31:15,143 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:31:15,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:31:15,143 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:31:15,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:31:15,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:31:15,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:31:15,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:31:15,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:31:15,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:31:15,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:31:15,145 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:31:15,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:31:15,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:31:15,146 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:31:15,146 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:31:15,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:31:15,147 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_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9492eb5ff634b400a7a5ea3f7f2cefeb5465f9e5361bb81d240cec0c0c035af [2022-11-18 20:31:15,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:31:15,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:31:15,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:31:15,490 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:31:15,491 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:31:15,493 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i [2022-11-18 20:31:15,594 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/data/9ffa79e2f/2c6ac6964a0644af90799e88a9111240/FLAG3f4ab61a7 [2022-11-18 20:31:16,460 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:31:16,461 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i [2022-11-18 20:31:16,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/data/9ffa79e2f/2c6ac6964a0644af90799e88a9111240/FLAG3f4ab61a7 [2022-11-18 20:31:16,565 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/data/9ffa79e2f/2c6ac6964a0644af90799e88a9111240 [2022-11-18 20:31:16,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:31:16,570 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:31:16,572 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:31:16,572 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:31:16,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:31:16,577 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:31:16" (1/1) ... [2022-11-18 20:31:16,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47e4b243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:16, skipping insertion in model container [2022-11-18 20:31:16,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:31:16" (1/1) ... [2022-11-18 20:31:16,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:31:16,655 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:31:17,164 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i[33022,33035] [2022-11-18 20:31:17,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:31:17,512 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:31:17,545 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test10-3.i[33022,33035] [2022-11-18 20:31:17,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:31:17,781 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:31:17,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17 WrapperNode [2022-11-18 20:31:17,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:31:17,785 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:31:17,785 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:31:17,785 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:31:17,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:17,862 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:18,034 INFO L138 Inliner]: procedures = 177, calls = 623, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2459 [2022-11-18 20:31:18,035 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:31:18,036 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:31:18,036 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:31:18,036 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:31:18,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:18,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:18,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:18,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:18,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:18,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:18,231 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:18,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:18,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:31:18,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:31:18,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:31:18,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:31:18,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (1/1) ... [2022-11-18 20:31:18,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:31:18,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:18,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:31:18,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:31:18,393 INFO L130 BoogieDeclarations]: Found specification of procedure test_int_int [2022-11-18 20:31:18,394 INFO L138 BoogieDeclarations]: Found implementation of procedure test_int_int [2022-11-18 20:31:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:31:18,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 20:31:18,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 20:31:18,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:31:18,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-18 20:31:18,395 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-18 20:31:18,396 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:31:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:31:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:31:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:31:18,397 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-18 20:31:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:31:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:31:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:31:18,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:31:18,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:31:18,830 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:31:18,832 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:31:22,183 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:31:22,203 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:31:22,203 INFO L300 CfgBuilder]: Removed 168 assume(true) statements. [2022-11-18 20:31:22,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:31:22 BoogieIcfgContainer [2022-11-18 20:31:22,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:31:22,211 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:31:22,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:31:22,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:31:22,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:31:16" (1/3) ... [2022-11-18 20:31:22,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0efc76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:31:22, skipping insertion in model container [2022-11-18 20:31:22,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:31:17" (2/3) ... [2022-11-18 20:31:22,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0efc76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:31:22, skipping insertion in model container [2022-11-18 20:31:22,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:31:22" (3/3) ... [2022-11-18 20:31:22,224 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test10-3.i [2022-11-18 20:31:22,250 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:31:22,250 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:31:22,377 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:31:22,388 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;@6aea3cc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:31:22,389 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:31:22,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 474 states, 455 states have (on average 1.7142857142857142) internal successors, (780), 460 states have internal predecessors, (780), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-18 20:31:22,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:31:22,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:22,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:22,415 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:22,425 INFO L85 PathProgramCache]: Analyzing trace with hash 210225997, now seen corresponding path program 1 times [2022-11-18 20:31:22,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:22,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295614393] [2022-11-18 20:31:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:22,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:22,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:22,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:22,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295614393] [2022-11-18 20:31:22,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295614393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:22,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:22,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:31:22,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909545624] [2022-11-18 20:31:22,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:22,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:31:22,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:31:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:31:22,796 INFO L87 Difference]: Start difference. First operand has 474 states, 455 states have (on average 1.7142857142857142) internal successors, (780), 460 states have internal predecessors, (780), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:22,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:22,921 INFO L93 Difference]: Finished difference Result 946 states and 1622 transitions. [2022-11-18 20:31:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:31:22,924 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 20:31:22,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:22,940 INFO L225 Difference]: With dead ends: 946 [2022-11-18 20:31:22,940 INFO L226 Difference]: Without dead ends: 420 [2022-11-18 20:31:22,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:31:22,950 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:22,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:31:22,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-18 20:31:23,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2022-11-18 20:31:23,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 402 states have (on average 1.3233830845771144) internal successors, (532), 407 states have internal predecessors, (532), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 20:31:23,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 559 transitions. [2022-11-18 20:31:23,041 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 559 transitions. Word has length 13 [2022-11-18 20:31:23,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:23,042 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 559 transitions. [2022-11-18 20:31:23,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 559 transitions. [2022-11-18 20:31:23,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-18 20:31:23,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:23,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:23,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:31:23,047 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:23,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:23,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1084411649, now seen corresponding path program 1 times [2022-11-18 20:31:23,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:23,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121094031] [2022-11-18 20:31:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:23,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:23,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:23,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121094031] [2022-11-18 20:31:23,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121094031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:23,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:23,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:31:23,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124944342] [2022-11-18 20:31:23,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:23,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:31:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:31:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:31:23,605 INFO L87 Difference]: Start difference. First operand 420 states and 559 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:24,462 INFO L93 Difference]: Finished difference Result 741 states and 991 transitions. [2022-11-18 20:31:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:31:24,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-11-18 20:31:24,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:24,468 INFO L225 Difference]: With dead ends: 741 [2022-11-18 20:31:24,469 INFO L226 Difference]: Without dead ends: 495 [2022-11-18 20:31:24,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:31:24,472 INFO L413 NwaCegarLoop]: 530 mSDtfsCounter, 97 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:24,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1455 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:31:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-18 20:31:24,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 422. [2022-11-18 20:31:24,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 404 states have (on average 1.3217821782178218) internal successors, (534), 409 states have internal predecessors, (534), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 20:31:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 561 transitions. [2022-11-18 20:31:24,500 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 561 transitions. Word has length 48 [2022-11-18 20:31:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:24,501 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 561 transitions. [2022-11-18 20:31:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 561 transitions. [2022-11-18 20:31:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:31:24,505 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:24,506 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:31:24,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:31:24,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:24,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:24,507 INFO L85 PathProgramCache]: Analyzing trace with hash -371947318, now seen corresponding path program 1 times [2022-11-18 20:31:24,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:24,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33287500] [2022-11-18 20:31:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:24,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:24,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:24,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331447974] [2022-11-18 20:31:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:24,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:24,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:24,710 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:24,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:31:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:25,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:31:25,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:25,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:25,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:25,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33287500] [2022-11-18 20:31:25,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:25,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331447974] [2022-11-18 20:31:25,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331447974] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:25,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:25,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:31:25,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747582437] [2022-11-18 20:31:25,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:25,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:31:25,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:25,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:31:25,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:25,702 INFO L87 Difference]: Start difference. First operand 422 states and 561 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:25,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:25,811 INFO L93 Difference]: Finished difference Result 861 states and 1149 transitions. [2022-11-18 20:31:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:31:25,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-18 20:31:25,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:25,814 INFO L225 Difference]: With dead ends: 861 [2022-11-18 20:31:25,814 INFO L226 Difference]: Without dead ends: 443 [2022-11-18 20:31:25,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:25,819 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 9 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:25,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1063 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:31:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-18 20:31:25,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 442. [2022-11-18 20:31:25,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 424 states have (on average 1.3066037735849056) internal successors, (554), 429 states have internal predecessors, (554), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 20:31:25,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 581 transitions. [2022-11-18 20:31:25,850 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 581 transitions. Word has length 101 [2022-11-18 20:31:25,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:25,850 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 581 transitions. [2022-11-18 20:31:25,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:25,851 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 581 transitions. [2022-11-18 20:31:25,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:31:25,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:25,855 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:31:25,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:26,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:26,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:26,065 INFO L85 PathProgramCache]: Analyzing trace with hash -612187064, now seen corresponding path program 1 times [2022-11-18 20:31:26,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:26,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273749475] [2022-11-18 20:31:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:26,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:26,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:26,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869775456] [2022-11-18 20:31:26,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:26,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:26,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:26,275 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:26,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:31:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:27,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:31:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:31:27,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:27,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:27,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273749475] [2022-11-18 20:31:27,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:27,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869775456] [2022-11-18 20:31:27,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869775456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:27,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:27,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:31:27,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590937064] [2022-11-18 20:31:27,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:27,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:31:27,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:27,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:31:27,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:27,288 INFO L87 Difference]: Start difference. First operand 442 states and 581 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:27,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:27,399 INFO L93 Difference]: Finished difference Result 697 states and 928 transitions. [2022-11-18 20:31:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:31:27,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-18 20:31:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:27,404 INFO L225 Difference]: With dead ends: 697 [2022-11-18 20:31:27,404 INFO L226 Difference]: Without dead ends: 463 [2022-11-18 20:31:27,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:27,406 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 10 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:27,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 1063 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:31:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-18 20:31:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 462. [2022-11-18 20:31:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 444 states have (on average 1.2927927927927927) internal successors, (574), 449 states have internal predecessors, (574), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 20:31:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 601 transitions. [2022-11-18 20:31:27,424 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 601 transitions. Word has length 101 [2022-11-18 20:31:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:27,425 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 601 transitions. [2022-11-18 20:31:27,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 601 transitions. [2022-11-18 20:31:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:31:27,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:27,431 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:31:27,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:27,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:27,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:27,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1776324428, now seen corresponding path program 1 times [2022-11-18 20:31:27,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:27,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908675205] [2022-11-18 20:31:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:27,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:27,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:27,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149092679] [2022-11-18 20:31:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:27,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:27,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:27,803 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:27,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:31:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:28,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:31:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:29,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:29,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:29,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:29,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908675205] [2022-11-18 20:31:29,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:29,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149092679] [2022-11-18 20:31:29,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149092679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:29,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:29,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:31:29,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570556948] [2022-11-18 20:31:29,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:29,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:31:29,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:29,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:31:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:31:29,021 INFO L87 Difference]: Start difference. First operand 462 states and 601 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:29,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:29,144 INFO L93 Difference]: Finished difference Result 994 states and 1299 transitions. [2022-11-18 20:31:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:31:29,145 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-18 20:31:29,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:29,148 INFO L225 Difference]: With dead ends: 994 [2022-11-18 20:31:29,149 INFO L226 Difference]: Without dead ends: 536 [2022-11-18 20:31:29,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:31:29,151 INFO L413 NwaCegarLoop]: 622 mSDtfsCounter, 507 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:29,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 1387 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:31:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-11-18 20:31:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 448. [2022-11-18 20:31:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 430 states have (on average 1.286046511627907) internal successors, (553), 435 states have internal predecessors, (553), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 20:31:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 580 transitions. [2022-11-18 20:31:29,170 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 580 transitions. Word has length 101 [2022-11-18 20:31:29,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:29,170 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 580 transitions. [2022-11-18 20:31:29,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:29,171 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 580 transitions. [2022-11-18 20:31:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:31:29,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:29,174 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:31:29,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:29,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:29,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:29,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:29,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1464846374, now seen corresponding path program 1 times [2022-11-18 20:31:29,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:29,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245263964] [2022-11-18 20:31:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:29,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:29,523 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:29,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022368647] [2022-11-18 20:31:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:29,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:29,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:29,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:29,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:31:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:30,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 1669 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:31:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:31:30,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:30,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:30,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245263964] [2022-11-18 20:31:30,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:30,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022368647] [2022-11-18 20:31:30,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022368647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:30,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:30,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:31:30,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891868734] [2022-11-18 20:31:30,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:30,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:31:30,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:30,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:31:30,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:31:30,842 INFO L87 Difference]: Start difference. First operand 448 states and 580 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:30,955 INFO L93 Difference]: Finished difference Result 671 states and 876 transitions. [2022-11-18 20:31:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:31:30,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-18 20:31:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:30,958 INFO L225 Difference]: With dead ends: 671 [2022-11-18 20:31:30,959 INFO L226 Difference]: Without dead ends: 435 [2022-11-18 20:31:30,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:31:30,960 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 294 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:30,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1290 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:31:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-18 20:31:30,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 434. [2022-11-18 20:31:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 416 states have (on average 1.2788461538461537) internal successors, (532), 421 states have internal predecessors, (532), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-18 20:31:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 559 transitions. [2022-11-18 20:31:30,980 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 559 transitions. Word has length 101 [2022-11-18 20:31:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:30,981 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 559 transitions. [2022-11-18 20:31:30,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 559 transitions. [2022-11-18 20:31:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:31:30,985 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:30,985 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-18 20:31:30,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:31,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:31,197 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:31,198 INFO L85 PathProgramCache]: Analyzing trace with hash -987630068, now seen corresponding path program 1 times [2022-11-18 20:31:31,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:31,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867047103] [2022-11-18 20:31:31,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:31,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:31,348 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:31,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636296786] [2022-11-18 20:31:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:31,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:31,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:31,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:31,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:31:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:32,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:31:32,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:31:32,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:32,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867047103] [2022-11-18 20:31:32,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:32,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636296786] [2022-11-18 20:31:32,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636296786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:32,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:32,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:31:32,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302356517] [2022-11-18 20:31:32,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:32,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:31:32,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:32,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:31:32,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:32,784 INFO L87 Difference]: Start difference. First operand 434 states and 559 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:32,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:32,901 INFO L93 Difference]: Finished difference Result 1092 states and 1409 transitions. [2022-11-18 20:31:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:31:32,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-11-18 20:31:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:32,905 INFO L225 Difference]: With dead ends: 1092 [2022-11-18 20:31:32,906 INFO L226 Difference]: Without dead ends: 662 [2022-11-18 20:31:32,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:32,908 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 247 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:32,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1142 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:31:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-11-18 20:31:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 658. [2022-11-18 20:31:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 635 states have (on average 1.2771653543307087) internal successors, (811), 640 states have internal predecessors, (811), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-18 20:31:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 848 transitions. [2022-11-18 20:31:32,938 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 848 transitions. Word has length 101 [2022-11-18 20:31:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:32,938 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 848 transitions. [2022-11-18 20:31:32,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:31:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 848 transitions. [2022-11-18 20:31:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-18 20:31:32,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:32,941 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:32,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:33,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:31:33,154 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:33,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:33,154 INFO L85 PathProgramCache]: Analyzing trace with hash -263981483, now seen corresponding path program 1 times [2022-11-18 20:31:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:33,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168503795] [2022-11-18 20:31:33,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:33,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:33,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720709150] [2022-11-18 20:31:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:33,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:33,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:33,217 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:33,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:31:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:34,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:31:34,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:34,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:31:34,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-18 20:31:34,446 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:31:34,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:31:34,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:31:34,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-18 20:31:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:31:34,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:34,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:34,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168503795] [2022-11-18 20:31:34,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:34,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720709150] [2022-11-18 20:31:34,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720709150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:34,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:34,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:31:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690281278] [2022-11-18 20:31:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:34,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:31:34,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:34,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:31:34,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:31:34,503 INFO L87 Difference]: Start difference. First operand 658 states and 848 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:31:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:35,785 INFO L93 Difference]: Finished difference Result 1228 states and 1581 transitions. [2022-11-18 20:31:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:31:35,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 116 [2022-11-18 20:31:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:35,789 INFO L225 Difference]: With dead ends: 1228 [2022-11-18 20:31:35,789 INFO L226 Difference]: Without dead ends: 658 [2022-11-18 20:31:35,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:31:35,791 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 97 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:35,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 1819 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 20:31:35,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-11-18 20:31:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 658. [2022-11-18 20:31:35,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 635 states have (on average 1.2755905511811023) internal successors, (810), 640 states have internal predecessors, (810), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-18 20:31:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 847 transitions. [2022-11-18 20:31:35,830 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 847 transitions. Word has length 116 [2022-11-18 20:31:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:35,831 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 847 transitions. [2022-11-18 20:31:35,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:31:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 847 transitions. [2022-11-18 20:31:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-18 20:31:35,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:35,839 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:35,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:36,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:36,050 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:36,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:36,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1573589792, now seen corresponding path program 1 times [2022-11-18 20:31:36,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:36,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120737040] [2022-11-18 20:31:36,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:36,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:36,221 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:36,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855893947] [2022-11-18 20:31:36,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:36,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:36,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:36,223 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:36,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:31:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:37,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 2237 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:31:37,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:31:37,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:37,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:37,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120737040] [2022-11-18 20:31:37,859 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:37,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855893947] [2022-11-18 20:31:37,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855893947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:37,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:37,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:31:37,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995826704] [2022-11-18 20:31:37,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:37,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:31:37,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:31:37,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:37,864 INFO L87 Difference]: Start difference. First operand 658 states and 847 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:31:37,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:37,987 INFO L93 Difference]: Finished difference Result 1340 states and 1735 transitions. [2022-11-18 20:31:37,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:31:37,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-11-18 20:31:37,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:37,990 INFO L225 Difference]: With dead ends: 1340 [2022-11-18 20:31:37,991 INFO L226 Difference]: Without dead ends: 700 [2022-11-18 20:31:37,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:37,995 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 9 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:37,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 1035 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:31:37,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2022-11-18 20:31:38,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 698. [2022-11-18 20:31:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 675 states have (on average 1.2592592592592593) internal successors, (850), 680 states have internal predecessors, (850), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-18 20:31:38,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 887 transitions. [2022-11-18 20:31:38,026 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 887 transitions. Word has length 163 [2022-11-18 20:31:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:38,027 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 887 transitions. [2022-11-18 20:31:38,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:31:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 887 transitions. [2022-11-18 20:31:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-18 20:31:38,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:38,033 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:38,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:38,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:38,246 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:38,247 INFO L85 PathProgramCache]: Analyzing trace with hash -357535842, now seen corresponding path program 1 times [2022-11-18 20:31:38,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:38,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524598859] [2022-11-18 20:31:38,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:38,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:38,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:38,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [748963391] [2022-11-18 20:31:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:38,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:38,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:38,436 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:38,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:31:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:40,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 2239 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-18 20:31:40,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:31:40,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:40,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:40,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524598859] [2022-11-18 20:31:40,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:40,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748963391] [2022-11-18 20:31:40,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748963391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:40,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:40,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:31:40,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658396721] [2022-11-18 20:31:40,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:40,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:31:40,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:40,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:31:40,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:31:40,167 INFO L87 Difference]: Start difference. First operand 698 states and 887 transitions. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:31:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:40,295 INFO L93 Difference]: Finished difference Result 1334 states and 1700 transitions. [2022-11-18 20:31:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:31:40,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-11-18 20:31:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:40,301 INFO L225 Difference]: With dead ends: 1334 [2022-11-18 20:31:40,301 INFO L226 Difference]: Without dead ends: 672 [2022-11-18 20:31:40,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:31:40,303 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 493 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:40,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 1087 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:31:40,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-11-18 20:31:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 670. [2022-11-18 20:31:40,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 647 states have (on average 1.248840803709428) internal successors, (808), 652 states have internal predecessors, (808), 19 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (18), 15 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-18 20:31:40,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 845 transitions. [2022-11-18 20:31:40,336 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 845 transitions. Word has length 163 [2022-11-18 20:31:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:40,336 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 845 transitions. [2022-11-18 20:31:40,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:31:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 845 transitions. [2022-11-18 20:31:40,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-18 20:31:40,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:40,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:40,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:40,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:40,560 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:40,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:40,560 INFO L85 PathProgramCache]: Analyzing trace with hash -509250644, now seen corresponding path program 1 times [2022-11-18 20:31:40,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:40,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103767393] [2022-11-18 20:31:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:40,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:40,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:40,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810879707] [2022-11-18 20:31:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:40,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:40,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:40,734 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:40,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:31:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:42,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 2225 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:31:42,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:31:42,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:42,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:42,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103767393] [2022-11-18 20:31:42,666 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:42,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810879707] [2022-11-18 20:31:42,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810879707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:42,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:42,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:31:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630030656] [2022-11-18 20:31:42,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:42,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:31:42,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:31:42,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:42,669 INFO L87 Difference]: Start difference. First operand 670 states and 845 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:31:42,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:42,789 INFO L93 Difference]: Finished difference Result 1521 states and 1944 transitions. [2022-11-18 20:31:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:31:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 163 [2022-11-18 20:31:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:42,794 INFO L225 Difference]: With dead ends: 1521 [2022-11-18 20:31:42,794 INFO L226 Difference]: Without dead ends: 909 [2022-11-18 20:31:42,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:31:42,796 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 220 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1049 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:42,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1049 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:31:42,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-18 20:31:42,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 807. [2022-11-18 20:31:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 781 states have (on average 1.259923175416133) internal successors, (984), 786 states have internal predecessors, (984), 22 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (21), 18 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-18 20:31:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1027 transitions. [2022-11-18 20:31:42,833 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1027 transitions. Word has length 163 [2022-11-18 20:31:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:42,833 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1027 transitions. [2022-11-18 20:31:42,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:31:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1027 transitions. [2022-11-18 20:31:42,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-18 20:31:42,836 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:42,836 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:42,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:43,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:43,051 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash 936600271, now seen corresponding path program 1 times [2022-11-18 20:31:43,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:43,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984920631] [2022-11-18 20:31:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:43,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:43,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:43,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027043222] [2022-11-18 20:31:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:43,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:43,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:43,168 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:43,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:31:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:31:44,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:31:44,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:31:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-18 20:31:45,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:31:45,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:31:45,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984920631] [2022-11-18 20:31:45,176 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:31:45,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027043222] [2022-11-18 20:31:45,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027043222] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:31:45,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:31:45,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:31:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43344830] [2022-11-18 20:31:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:31:45,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:31:45,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:31:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:31:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:31:45,179 INFO L87 Difference]: Start difference. First operand 807 states and 1027 transitions. Second operand has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:31:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:31:45,964 INFO L93 Difference]: Finished difference Result 1332 states and 1701 transitions. [2022-11-18 20:31:45,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:31:45,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 178 [2022-11-18 20:31:45,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:31:45,968 INFO L225 Difference]: With dead ends: 1332 [2022-11-18 20:31:45,969 INFO L226 Difference]: Without dead ends: 659 [2022-11-18 20:31:45,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:31:45,971 INFO L413 NwaCegarLoop]: 511 mSDtfsCounter, 823 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:31:45,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 635 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-18 20:31:45,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-11-18 20:31:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2022-11-18 20:31:46,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 638 states have (on average 1.244514106583072) internal successors, (794), 643 states have internal predecessors, (794), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-18 20:31:46,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 827 transitions. [2022-11-18 20:31:46,004 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 827 transitions. Word has length 178 [2022-11-18 20:31:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:31:46,005 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 827 transitions. [2022-11-18 20:31:46,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.75) internal successors, (159), 4 states have internal predecessors, (159), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:31:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 827 transitions. [2022-11-18 20:31:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-11-18 20:31:46,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:31:46,009 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:31:46,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:31:46,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:31:46,221 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:31:46,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:31:46,222 INFO L85 PathProgramCache]: Analyzing trace with hash 105070510, now seen corresponding path program 1 times [2022-11-18 20:31:46,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:31:46,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518796575] [2022-11-18 20:31:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:46,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:31:46,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:31:46,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742153503] [2022-11-18 20:31:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:31:46,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:31:46,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:31:46,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:31:46,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:35:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:35:10,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:35:10,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:35:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:35:10,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:35:10,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:35:10,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518796575] [2022-11-18 20:35:10,170 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:35:10,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742153503] [2022-11-18 20:35:10,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742153503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:35:10,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:35:10,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:35:10,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662579794] [2022-11-18 20:35:10,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:35:10,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:35:10,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:35:10,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:35:10,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:35:10,173 INFO L87 Difference]: Start difference. First operand 659 states and 827 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:35:10,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:35:10,266 INFO L93 Difference]: Finished difference Result 1269 states and 1606 transitions. [2022-11-18 20:35:10,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:35:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 185 [2022-11-18 20:35:10,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:35:10,270 INFO L225 Difference]: With dead ends: 1269 [2022-11-18 20:35:10,271 INFO L226 Difference]: Without dead ends: 662 [2022-11-18 20:35:10,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:35:10,273 INFO L413 NwaCegarLoop]: 532 mSDtfsCounter, 2 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:35:10,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1589 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:35:10,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-11-18 20:35:10,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2022-11-18 20:35:10,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 640 states have (on average 1.2453125) internal successors, (797), 646 states have internal predecessors, (797), 17 states have call successors, (17), 3 states have call predecessors, (17), 4 states have return successors, (19), 13 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-18 20:35:10,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 833 transitions. [2022-11-18 20:35:10,314 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 833 transitions. Word has length 185 [2022-11-18 20:35:10,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:35:10,315 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 833 transitions. [2022-11-18 20:35:10,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:35:10,315 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 833 transitions. [2022-11-18 20:35:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-11-18 20:35:10,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:35:10,319 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:35:10,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:35:10,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:35:10,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:35:10,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:35:10,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2122034318, now seen corresponding path program 1 times [2022-11-18 20:35:10,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:35:10,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859550111] [2022-11-18 20:35:10,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:10,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:35:10,656 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:35:10,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169016731] [2022-11-18 20:35:10,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:35:10,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:35:10,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:35:10,659 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:35:10,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4af4cc9-ed31-431e-85fc-662e753931b0/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process