./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa --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 50ec0e1b32f61b9ee697cf2c7598d178ee7b7b08e68108a0f594c4a6a80ab80c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:57:44,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:57:44,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:57:44,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:57:44,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:57:44,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:57:44,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:57:44,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:57:44,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:57:44,142 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:57:44,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:57:44,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:57:44,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:57:44,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:57:44,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:57:44,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:57:44,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:57:44,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:57:44,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:57:44,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:57:44,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:57:44,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:57:44,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:57:44,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:57:44,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:57:44,159 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:57:44,160 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:57:44,160 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:57:44,161 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:57:44,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:57:44,162 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:57:44,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:57:44,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:57:44,164 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:57:44,165 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:57:44,165 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:57:44,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:57:44,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:57:44,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:57:44,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:57:44,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:57:44,168 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:57:44,185 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:57:44,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:57:44,185 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:57:44,185 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:57:44,186 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:57:44,186 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:57:44,186 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:57:44,187 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:57:44,187 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:57:44,187 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:57:44,187 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:57:44,187 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:57:44,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:57:44,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:57:44,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:57:44,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:57:44,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:57:44,188 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:57:44,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:57:44,188 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:57:44,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:57:44,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:57:44,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:57:44,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:57:44,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:57:44,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:57:44,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:57:44,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:57:44,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:57:44,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:57:44,189 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:57:44,189 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:57:44,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:57:44,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:57:44,189 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_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50ec0e1b32f61b9ee697cf2c7598d178ee7b7b08e68108a0f594c4a6a80ab80c [2021-12-06 18:57:44,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:57:44,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:57:44,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:57:44,376 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:57:44,376 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:57:44,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-2.i [2021-12-06 18:57:44,423 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/data/23274ae54/29194f332739414887b1db001321a6a9/FLAG55da2cd66 [2021-12-06 18:57:44,914 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:57:44,914 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-2.i [2021-12-06 18:57:44,933 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/data/23274ae54/29194f332739414887b1db001321a6a9/FLAG55da2cd66 [2021-12-06 18:57:44,948 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/data/23274ae54/29194f332739414887b1db001321a6a9 [2021-12-06 18:57:44,950 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:57:44,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:57:44,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:57:44,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:57:44,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:57:44,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:57:44" (1/1) ... [2021-12-06 18:57:44,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74b06565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:44, skipping insertion in model container [2021-12-06 18:57:44,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:57:44" (1/1) ... [2021-12-06 18:57:44,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:57:45,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:57:45,294 WARN L230 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_01cb983c-2c23-4330-b414-a61a56c92c2d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-2.i[33021,33034] [2021-12-06 18:57:45,443 WARN L230 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_01cb983c-2c23-4330-b414-a61a56c92c2d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-2.i[84583,84596] [2021-12-06 18:57:45,454 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:57:45,460 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:57:45,485 WARN L230 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_01cb983c-2c23-4330-b414-a61a56c92c2d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-2.i[33021,33034] [2021-12-06 18:57:45,557 WARN L230 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_01cb983c-2c23-4330-b414-a61a56c92c2d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-2.i[84583,84596] [2021-12-06 18:57:45,562 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:57:45,590 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:57:45,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45 WrapperNode [2021-12-06 18:57:45,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:57:45,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:57:45,591 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:57:45,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:57:45,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (1/1) ... [2021-12-06 18:57:45,638 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (1/1) ... [2021-12-06 18:57:45,719 INFO L137 Inliner]: procedures = 177, calls = 781, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3019 [2021-12-06 18:57:45,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:57:45,720 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:57:45,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:57:45,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:57:45,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (1/1) ... [2021-12-06 18:57:45,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (1/1) ... [2021-12-06 18:57:45,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (1/1) ... [2021-12-06 18:57:45,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (1/1) ... [2021-12-06 18:57:45,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (1/1) ... [2021-12-06 18:57:45,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (1/1) ... [2021-12-06 18:57:45,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (1/1) ... [2021-12-06 18:57:45,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:57:45,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:57:45,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:57:45,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:57:45,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (1/1) ... [2021-12-06 18:57:45,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:57:45,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:57:45,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:57:45,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:57:45,892 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:57:45,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 18:57:45,892 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 18:57:45,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:57:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-06 18:57:45,893 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-06 18:57:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 18:57:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:57:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 18:57:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:57:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-06 18:57:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 18:57:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:57:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:57:45,893 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:57:45,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:57:46,010 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:57:46,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:57:47,488 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:57:47,504 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:57:47,504 INFO L301 CfgBuilder]: Removed 63 assume(true) statements. [2021-12-06 18:57:47,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:57:47 BoogieIcfgContainer [2021-12-06 18:57:47,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:57:47,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:57:47,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:57:47,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:57:47,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:57:44" (1/3) ... [2021-12-06 18:57:47,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63efb296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:57:47, skipping insertion in model container [2021-12-06 18:57:47,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:57:45" (2/3) ... [2021-12-06 18:57:47,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63efb296 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:57:47, skipping insertion in model container [2021-12-06 18:57:47,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:57:47" (3/3) ... [2021-12-06 18:57:47,513 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test9-2.i [2021-12-06 18:57:47,517 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:57:47,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 18:57:47,560 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:57:47,565 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 18:57:47,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 18:57:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 1196 states, 688 states have (on average 1.9127906976744187) internal successors, (1316), 1190 states have internal predecessors, (1316), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-06 18:57:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 18:57:47,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:47,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:57:47,610 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:47,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash -858764483, now seen corresponding path program 1 times [2021-12-06 18:57:47,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:47,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314696855] [2021-12-06 18:57:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:47,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:57:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:57:47,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:57:47,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314696855] [2021-12-06 18:57:47,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314696855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:57:47,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:57:47,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:57:47,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435109095] [2021-12-06 18:57:47,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:57:47,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:57:47,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:57:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:57:47,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:57:47,777 INFO L87 Difference]: Start difference. First operand has 1196 states, 688 states have (on average 1.9127906976744187) internal successors, (1316), 1190 states have internal predecessors, (1316), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:57:47,905 INFO L93 Difference]: Finished difference Result 2390 states and 5142 transitions. [2021-12-06 18:57:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:57:47,907 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-06 18:57:47,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:57:47,932 INFO L225 Difference]: With dead ends: 2390 [2021-12-06 18:57:47,933 INFO L226 Difference]: Without dead ends: 1163 [2021-12-06 18:57:47,942 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:57:47,945 INFO L933 BasicCegarLoop]: 2253 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, 2253 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 [2021-12-06 18:57:47,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2253 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:57:47,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-12-06 18:57:48,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1163. [2021-12-06 18:57:48,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 656 states have (on average 1.833841463414634) internal successors, (1203), 1157 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-06 18:57:48,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2209 transitions. [2021-12-06 18:57:48,261 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2209 transitions. Word has length 9 [2021-12-06 18:57:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:57:48,261 INFO L470 AbstractCegarLoop]: Abstraction has 1163 states and 2209 transitions. [2021-12-06 18:57:48,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2209 transitions. [2021-12-06 18:57:48,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-06 18:57:48,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:48,263 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:57:48,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:57:48,263 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:48,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:48,264 INFO L85 PathProgramCache]: Analyzing trace with hash -293931519, now seen corresponding path program 1 times [2021-12-06 18:57:48,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:48,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498465688] [2021-12-06 18:57:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:48,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:57:48,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:57:48,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:57:48,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498465688] [2021-12-06 18:57:48,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498465688] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:57:48,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:57:48,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:57:48,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796961364] [2021-12-06 18:57:48,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:57:48,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:57:48,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:57:48,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:57:48,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:57:48,331 INFO L87 Difference]: Start difference. First operand 1163 states and 2209 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:49,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:57:49,151 INFO L93 Difference]: Finished difference Result 3333 states and 6429 transitions. [2021-12-06 18:57:49,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:57:49,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-12-06 18:57:49,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:57:49,169 INFO L225 Difference]: With dead ends: 3333 [2021-12-06 18:57:49,169 INFO L226 Difference]: Without dead ends: 2264 [2021-12-06 18:57:49,174 INFO L932 BasicCegarLoop]: 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 [2021-12-06 18:57:49,175 INFO L933 BasicCegarLoop]: 2673 mSDtfsCounter, 1128 mSDsluCounter, 4315 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 6988 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 18:57:49,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1628 Valid, 6988 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 18:57:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-12-06 18:57:49,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1165. [2021-12-06 18:57:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 658 states have (on average 1.831306990881459) internal successors, (1205), 1159 states have internal predecessors, (1205), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-06 18:57:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 2211 transitions. [2021-12-06 18:57:49,504 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 2211 transitions. Word has length 44 [2021-12-06 18:57:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:57:49,504 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 2211 transitions. [2021-12-06 18:57:49,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:49,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 2211 transitions. [2021-12-06 18:57:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 18:57:49,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:49,508 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:57:49,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:57:49,508 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:49,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1509497837, now seen corresponding path program 1 times [2021-12-06 18:57:49,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:49,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786336346] [2021-12-06 18:57:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:49,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:49,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:57:49,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630755168] [2021-12-06 18:57:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:49,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:49,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:57:49,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:57:49,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:57:49,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:57:49,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:57:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:57:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:57:50,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:57:50,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:57:50,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786336346] [2021-12-06 18:57:50,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:57:50,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630755168] [2021-12-06 18:57:50,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630755168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:57:50,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:57:50,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:57:50,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165518505] [2021-12-06 18:57:50,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:57:50,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:57:50,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:57:50,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:57:50,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:57:50,091 INFO L87 Difference]: Start difference. First operand 1165 states and 2211 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:57:50,191 INFO L93 Difference]: Finished difference Result 2347 states and 4449 transitions. [2021-12-06 18:57:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:57:50,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-06 18:57:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:57:50,199 INFO L225 Difference]: With dead ends: 2347 [2021-12-06 18:57:50,199 INFO L226 Difference]: Without dead ends: 1186 [2021-12-06 18:57:50,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:57:50,204 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 9 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4363 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:57:50,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4363 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:57:50,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-12-06 18:57:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1185. [2021-12-06 18:57:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 678 states have (on average 1.8067846607669618) internal successors, (1225), 1179 states have internal predecessors, (1225), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-06 18:57:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 2231 transitions. [2021-12-06 18:57:50,333 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 2231 transitions. Word has length 96 [2021-12-06 18:57:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:57:50,333 INFO L470 AbstractCegarLoop]: Abstraction has 1185 states and 2231 transitions. [2021-12-06 18:57:50,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 2231 transitions. [2021-12-06 18:57:50,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 18:57:50,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:50,336 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:57:50,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:57:50,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:50,538 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1482432235, now seen corresponding path program 1 times [2021-12-06 18:57:50,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:50,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149785313] [2021-12-06 18:57:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:50,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:50,734 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:57:50,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050050114] [2021-12-06 18:57:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:50,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:50,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:57:50,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:57:50,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:57:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:57:51,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:57:51,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:57:51,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:57:51,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:57:51,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:57:51,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149785313] [2021-12-06 18:57:51,201 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:57:51,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050050114] [2021-12-06 18:57:51,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050050114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:57:51,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:57:51,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:57:51,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944261641] [2021-12-06 18:57:51,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:57:51,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:57:51,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:57:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:57:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:57:51,203 INFO L87 Difference]: Start difference. First operand 1185 states and 2231 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:51,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:57:51,288 INFO L93 Difference]: Finished difference Result 2274 states and 4348 transitions. [2021-12-06 18:57:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:57:51,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-06 18:57:51,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:57:51,296 INFO L225 Difference]: With dead ends: 2274 [2021-12-06 18:57:51,296 INFO L226 Difference]: Without dead ends: 1206 [2021-12-06 18:57:51,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:57:51,302 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 8 mSDsluCounter, 2174 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4365 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:57:51,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 4365 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:57:51,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-12-06 18:57:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1205. [2021-12-06 18:57:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 698 states have (on average 1.7836676217765044) internal successors, (1245), 1199 states have internal predecessors, (1245), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-06 18:57:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 2251 transitions. [2021-12-06 18:57:51,437 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 2251 transitions. Word has length 96 [2021-12-06 18:57:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:57:51,438 INFO L470 AbstractCegarLoop]: Abstraction has 1205 states and 2251 transitions. [2021-12-06 18:57:51,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 2251 transitions. [2021-12-06 18:57:51,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 18:57:51,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:51,440 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:57:51,463 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:57:51,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:51,640 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:51,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:51,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1801417811, now seen corresponding path program 1 times [2021-12-06 18:57:51,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:51,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714956135] [2021-12-06 18:57:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:51,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:51,696 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:57:51,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691554060] [2021-12-06 18:57:51,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:51,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:57:51,698 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:57:51,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:57:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:57:52,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 1642 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 18:57:52,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:57:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:57:52,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:57:52,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:57:52,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714956135] [2021-12-06 18:57:52,181 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:57:52,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691554060] [2021-12-06 18:57:52,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691554060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:57:52,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:57:52,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:57:52,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351334568] [2021-12-06 18:57:52,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:57:52,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:57:52,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:57:52,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:57:52,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:57:52,182 INFO L87 Difference]: Start difference. First operand 1205 states and 2251 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:57:52,266 INFO L93 Difference]: Finished difference Result 2398 states and 4490 transitions. [2021-12-06 18:57:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:57:52,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-06 18:57:52,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:57:52,274 INFO L225 Difference]: With dead ends: 2398 [2021-12-06 18:57:52,274 INFO L226 Difference]: Without dead ends: 1197 [2021-12-06 18:57:52,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:57:52,279 INFO L933 BasicCegarLoop]: 2189 mSDtfsCounter, 1182 mSDsluCounter, 2697 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 4886 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:57:52,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1685 Valid, 4886 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:57:52,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-12-06 18:57:52,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1191. [2021-12-06 18:57:52,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 684 states have (on average 1.7894736842105263) internal successors, (1224), 1185 states have internal predecessors, (1224), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-06 18:57:52,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 2230 transitions. [2021-12-06 18:57:52,406 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 2230 transitions. Word has length 96 [2021-12-06 18:57:52,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:57:52,407 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 2230 transitions. [2021-12-06 18:57:52,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:52,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 2230 transitions. [2021-12-06 18:57:52,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 18:57:52,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:52,408 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:57:52,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:57:52,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:52,609 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:52,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:52,609 INFO L85 PathProgramCache]: Analyzing trace with hash 432450363, now seen corresponding path program 1 times [2021-12-06 18:57:52,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:52,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159732538] [2021-12-06 18:57:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:52,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:52,660 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:57:52,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356394253] [2021-12-06 18:57:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:52,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:52,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:57:52,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:57:52,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:57:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:57:53,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 18:57:53,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:57:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:57:53,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:57:53,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:57:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159732538] [2021-12-06 18:57:53,154 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:57:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356394253] [2021-12-06 18:57:53,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356394253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:57:53,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:57:53,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:57:53,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419389846] [2021-12-06 18:57:53,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:57:53,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:57:53,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:57:53,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:57:53,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:57:53,155 INFO L87 Difference]: Start difference. First operand 1191 states and 2230 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:57:53,265 INFO L93 Difference]: Finished difference Result 2271 states and 4328 transitions. [2021-12-06 18:57:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:57:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-06 18:57:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:57:53,273 INFO L225 Difference]: With dead ends: 2271 [2021-12-06 18:57:53,273 INFO L226 Difference]: Without dead ends: 1183 [2021-12-06 18:57:53,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:57:53,277 INFO L933 BasicCegarLoop]: 2180 mSDtfsCounter, 1076 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1576 SdHoareTripleChecker+Valid, 4973 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:57:53,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1576 Valid, 4973 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:57:53,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2021-12-06 18:57:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1177. [2021-12-06 18:57:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 670 states have (on average 1.7955223880597015) internal successors, (1203), 1171 states have internal predecessors, (1203), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-06 18:57:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2209 transitions. [2021-12-06 18:57:53,406 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2209 transitions. Word has length 96 [2021-12-06 18:57:53,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:57:53,406 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 2209 transitions. [2021-12-06 18:57:53,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2209 transitions. [2021-12-06 18:57:53,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-06 18:57:53,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:53,407 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:57:53,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:57:53,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 18:57:53,608 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:53,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:53,610 INFO L85 PathProgramCache]: Analyzing trace with hash -725158097, now seen corresponding path program 1 times [2021-12-06 18:57:53,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:53,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38225230] [2021-12-06 18:57:53,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:53,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:53,792 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:57:53,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584046834] [2021-12-06 18:57:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:53,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:53,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:57:53,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:57:53,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:57:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:57:54,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:57:54,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:57:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:57:54,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:57:54,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:57:54,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38225230] [2021-12-06 18:57:54,354 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:57:54,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584046834] [2021-12-06 18:57:54,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584046834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:57:54,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:57:54,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:57:54,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935963115] [2021-12-06 18:57:54,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:57:54,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:57:54,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:57:54,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:57:54,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:57:54,356 INFO L87 Difference]: Start difference. First operand 1177 states and 2209 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:54,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:57:54,458 INFO L93 Difference]: Finished difference Result 3446 states and 6522 transitions. [2021-12-06 18:57:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:57:54,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-12-06 18:57:54,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:57:54,473 INFO L225 Difference]: With dead ends: 3446 [2021-12-06 18:57:54,473 INFO L226 Difference]: Without dead ends: 2273 [2021-12-06 18:57:54,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:57:54,477 INFO L933 BasicCegarLoop]: 2736 mSDtfsCounter, 1065 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 4911 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:57:54,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1567 Valid, 4911 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:57:54,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-12-06 18:57:54,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2271. [2021-12-06 18:57:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 1264 states have (on average 1.8259493670886076) internal successors, (2308), 2265 states have internal predecessors, (2308), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2021-12-06 18:57:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 4314 transitions. [2021-12-06 18:57:54,763 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 4314 transitions. Word has length 96 [2021-12-06 18:57:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:57:54,764 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 4314 transitions. [2021-12-06 18:57:54,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:57:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 4314 transitions. [2021-12-06 18:57:54,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-06 18:57:54,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:54,765 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:57:54,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 18:57:54,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:54,967 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:54,968 INFO L85 PathProgramCache]: Analyzing trace with hash -892194403, now seen corresponding path program 1 times [2021-12-06 18:57:54,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:54,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133477571] [2021-12-06 18:57:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:54,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:55,032 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:57:55,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160748289] [2021-12-06 18:57:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:55,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:55,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:57:55,033 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:57:55,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:57:55,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:57:55,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 18:57:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:57:55,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:57:55,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:57:55,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:57:55,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133477571] [2021-12-06 18:57:55,458 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:57:55,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160748289] [2021-12-06 18:57:55,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160748289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:57:55,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:57:55,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:57:55,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264064574] [2021-12-06 18:57:55,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:57:55,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:57:55,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:57:55,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:57:55,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:57:55,459 INFO L87 Difference]: Start difference. First operand 2271 states and 4314 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:57:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:57:56,386 INFO L93 Difference]: Finished difference Result 3444 states and 6519 transitions. [2021-12-06 18:57:56,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:57:56,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2021-12-06 18:57:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:57:56,398 INFO L225 Difference]: With dead ends: 3444 [2021-12-06 18:57:56,398 INFO L226 Difference]: Without dead ends: 1221 [2021-12-06 18:57:56,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:57:56,408 INFO L933 BasicCegarLoop]: 2201 mSDtfsCounter, 2254 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 3272 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:57:56,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2254 Valid, 3272 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:57:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-12-06 18:57:56,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2021-12-06 18:57:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 714 states have (on average 1.7507002801120448) internal successors, (1250), 1215 states have internal predecessors, (1250), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2021-12-06 18:57:56,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2256 transitions. [2021-12-06 18:57:56,543 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2256 transitions. Word has length 111 [2021-12-06 18:57:56,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:57:56,543 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 2256 transitions. [2021-12-06 18:57:56,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:57:56,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2256 transitions. [2021-12-06 18:57:56,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 18:57:56,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:56,544 INFO L514 BasicCegarLoop]: 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] [2021-12-06 18:57:56,566 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:57:56,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:56,745 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:56,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:56,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1386255789, now seen corresponding path program 1 times [2021-12-06 18:57:56,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:56,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862506240] [2021-12-06 18:57:56,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:56,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:56,803 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:57:56,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114467424] [2021-12-06 18:57:56,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:56,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:56,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:57:56,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:57:56,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:57:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:57:57,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 18:57:57,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:57:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:57:57,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 18:57:57,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:57:57,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862506240] [2021-12-06 18:57:57,505 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:57:57,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114467424] [2021-12-06 18:57:57,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114467424] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:57:57,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:57:57,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:57:57,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470850382] [2021-12-06 18:57:57,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:57:57,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:57:57,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:57:57,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:57:57,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:57:57,506 INFO L87 Difference]: Start difference. First operand 1221 states and 2256 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:57:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:57:57,577 INFO L93 Difference]: Finished difference Result 2394 states and 4461 transitions. [2021-12-06 18:57:57,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 18:57:57,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2021-12-06 18:57:57,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:57:57,586 INFO L225 Difference]: With dead ends: 2394 [2021-12-06 18:57:57,586 INFO L226 Difference]: Without dead ends: 1224 [2021-12-06 18:57:57,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:57:57,591 INFO L933 BasicCegarLoop]: 2191 mSDtfsCounter, 2 mSDsluCounter, 4378 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6569 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:57:57,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 6569 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:57:57,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-12-06 18:57:57,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1224. [2021-12-06 18:57:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 716 states have (on average 1.75) internal successors, (1253), 1218 states have internal predecessors, (1253), 503 states have call successors, (503), 2 states have call predecessors, (503), 3 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-06 18:57:57,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2260 transitions. [2021-12-06 18:57:57,733 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2260 transitions. Word has length 118 [2021-12-06 18:57:57,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:57:57,733 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2260 transitions. [2021-12-06 18:57:57,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 18:57:57,733 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2260 transitions. [2021-12-06 18:57:57,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-06 18:57:57,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:57:57,735 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:57:57,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:57:57,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:57,935 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:57:57,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:57:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash 137059189, now seen corresponding path program 1 times [2021-12-06 18:57:57,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:57:57,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67948046] [2021-12-06 18:57:57,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:57,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:57:57,964 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:57:57,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596446475] [2021-12-06 18:57:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:57:57,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:57:57,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:57:57,966 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:57:57,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:58:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:58:25,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 18:58:25,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:58:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:58:25,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:58:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:58:26,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67948046] [2021-12-06 18:58:26,074 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:58:26,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596446475] [2021-12-06 18:58:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596446475] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:58:26,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:58:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-06 18:58:26,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554717327] [2021-12-06 18:58:26,075 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:58:26,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 18:58:26,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 18:58:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 18:58:26,076 INFO L87 Difference]: Start difference. First operand 1224 states and 2260 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:58:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:26,212 INFO L93 Difference]: Finished difference Result 2408 states and 4482 transitions. [2021-12-06 18:58:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 18:58:26,213 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2021-12-06 18:58:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:26,220 INFO L225 Difference]: With dead ends: 2408 [2021-12-06 18:58:26,221 INFO L226 Difference]: Without dead ends: 1235 [2021-12-06 18:58:26,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:58:26,225 INFO L933 BasicCegarLoop]: 2192 mSDtfsCounter, 11 mSDsluCounter, 13125 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 15317 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:26,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 15317 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:58:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2021-12-06 18:58:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1233. [2021-12-06 18:58:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 724 states have (on average 1.75) internal successors, (1267), 1226 states have internal predecessors, (1267), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-06 18:58:26,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2274 transitions. [2021-12-06 18:58:26,424 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2274 transitions. Word has length 120 [2021-12-06 18:58:26,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:26,424 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 2274 transitions. [2021-12-06 18:58:26,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:58:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2274 transitions. [2021-12-06 18:58:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-06 18:58:26,425 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:26,425 INFO L514 BasicCegarLoop]: trace histogram [6, 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] [2021-12-06 18:58:26,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:58:26,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:26,626 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:58:26,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:26,626 INFO L85 PathProgramCache]: Analyzing trace with hash -18567917, now seen corresponding path program 2 times [2021-12-06 18:58:26,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:26,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532532635] [2021-12-06 18:58:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:26,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:26,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:58:26,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237195434] [2021-12-06 18:58:26,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:58:26,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:26,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:26,657 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:58:26,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:58:27,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:58:27,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:58:27,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 868 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:58:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:58:27,255 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:58:27,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:58:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:58:27,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:58:27,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532532635] [2021-12-06 18:58:27,436 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 18:58:27,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237195434] [2021-12-06 18:58:27,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237195434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:58:27,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 18:58:27,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-12-06 18:58:27,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45473990] [2021-12-06 18:58:27,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 18:58:27,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 18:58:27,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:58:27,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 18:58:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:58:27,438 INFO L87 Difference]: Start difference. First operand 1233 states and 2274 transitions. Second operand has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:58:28,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:58:28,098 INFO L93 Difference]: Finished difference Result 2428 states and 4512 transitions. [2021-12-06 18:58:28,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 18:58:28,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2021-12-06 18:58:28,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:58:28,106 INFO L225 Difference]: With dead ends: 2428 [2021-12-06 18:58:28,107 INFO L226 Difference]: Without dead ends: 1250 [2021-12-06 18:58:28,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:58:28,111 INFO L933 BasicCegarLoop]: 2194 mSDtfsCounter, 56 mSDsluCounter, 17506 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 19700 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:58:28,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 19700 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:58:28,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-12-06 18:58:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1242. [2021-12-06 18:58:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 733 states have (on average 1.7448840381991815) internal successors, (1279), 1235 states have internal predecessors, (1279), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2021-12-06 18:58:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 2286 transitions. [2021-12-06 18:58:28,244 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 2286 transitions. Word has length 124 [2021-12-06 18:58:28,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:58:28,244 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 2286 transitions. [2021-12-06 18:58:28,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 18:58:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 2286 transitions. [2021-12-06 18:58:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-12-06 18:58:28,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:58:28,246 INFO L514 BasicCegarLoop]: trace histogram [15, 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] [2021-12-06 18:58:28,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:58:28,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 18:58:28,447 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:58:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:58:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1200200847, now seen corresponding path program 3 times [2021-12-06 18:58:28,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:58:28,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427410499] [2021-12-06 18:58:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:58:28,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:58:28,539 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 18:58:28,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069350574] [2021-12-06 18:58:28,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:58:28,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:58:28,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:58:28,540 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:58:28,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cb983c-2c23-4330-b414-a61a56c92c2d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process