./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:43:25,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:43:25,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:43:25,811 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:43:25,812 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:43:25,813 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:43:25,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:43:25,817 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:43:25,819 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:43:25,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:43:25,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:43:25,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:43:25,823 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:43:25,824 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:43:25,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:43:25,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:43:25,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:43:25,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:43:25,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:43:25,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:43:25,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:43:25,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:43:25,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:43:25,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:43:25,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:43:25,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:43:25,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:43:25,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:43:25,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:43:25,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:43:25,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:43:25,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:43:25,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:43:25,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:43:25,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:43:25,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:43:25,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:43:25,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:43:25,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:43:25,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:43:25,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:43:25,860 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:43:25,887 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:43:25,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:43:25,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:43:25,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:43:25,889 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:43:25,889 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:43:25,890 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:43:25,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:43:25,891 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:43:25,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:43:25,891 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:43:25,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:43:25,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:43:25,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:43:25,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:43:25,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:43:25,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:43:25,894 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:43:25,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:43:25,894 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:43:25,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:43:25,895 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:43:25,895 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:43:25,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:43:25,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:43:25,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:43:25,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:43:25,897 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:43:25,897 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:43:25,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:43:25,898 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:43:25,898 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:43:25,898 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:43:25,899 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_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 [2022-11-18 20:43:26,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:43:26,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:43:26,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:43:26,262 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:43:26,263 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:43:26,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-11-18 20:43:26,360 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/data/9311fd31b/9953869e0ef14d2db1e99dff2283a4bc/FLAGa0fc7056c [2022-11-18 20:43:27,009 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:43:27,009 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2022-11-18 20:43:27,016 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/data/9311fd31b/9953869e0ef14d2db1e99dff2283a4bc/FLAGa0fc7056c [2022-11-18 20:43:27,361 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/data/9311fd31b/9953869e0ef14d2db1e99dff2283a4bc [2022-11-18 20:43:27,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:43:27,366 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:43:27,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:43:27,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:43:27,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:43:27,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155e5d3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27, skipping insertion in model container [2022-11-18 20:43:27,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:43:27,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:43:27,621 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2022-11-18 20:43:27,669 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:43:27,683 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:43:27,700 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c[490,503] [2022-11-18 20:43:27,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:43:27,741 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:43:27,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27 WrapperNode [2022-11-18 20:43:27,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:43:27,744 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:43:27,744 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:43:27,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:43:27,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,773 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,792 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2022-11-18 20:43:27,792 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:43:27,793 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:43:27,793 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:43:27,793 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:43:27,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,813 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:43:27,834 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:43:27,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:43:27,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:43:27,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (1/1) ... [2022-11-18 20:43:27,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:43:27,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:27,880 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:43:27,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:43:27,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:43:27,932 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 20:43:27,932 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 20:43:27,932 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:43:27,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:43:27,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:43:27,933 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 20:43:27,933 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 20:43:28,022 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:43:28,026 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:43:28,243 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:43:28,250 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:43:28,250 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:43:28,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:43:28 BoogieIcfgContainer [2022-11-18 20:43:28,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:43:28,255 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:43:28,255 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:43:28,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:43:28,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:43:27" (1/3) ... [2022-11-18 20:43:28,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2bb1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:43:28, skipping insertion in model container [2022-11-18 20:43:28,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:27" (2/3) ... [2022-11-18 20:43:28,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2bb1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:43:28, skipping insertion in model container [2022-11-18 20:43:28,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:43:28" (3/3) ... [2022-11-18 20:43:28,265 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2022-11-18 20:43:28,289 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:43:28,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:43:28,370 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:43:28,378 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5e9d9783, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:43:28,378 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:43:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-18 20:43:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:43:28,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:28,395 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:28,396 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:28,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:28,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2022-11-18 20:43:28,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:28,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285786195] [2022-11-18 20:43:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:28,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:28,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:28,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285786195] [2022-11-18 20:43:28,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:43:28,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081205225] [2022-11-18 20:43:28,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:28,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:28,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:28,654 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:28,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:43:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 20:43:28,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-18 20:43:28,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:43:28,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081205225] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:43:28,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:43:28,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:43:28,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893234324] [2022-11-18 20:43:28,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:43:28,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:43:28,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:28,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:43:28,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:43:28,922 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:43:28,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:28,970 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2022-11-18 20:43:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:43:28,974 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-11-18 20:43:28,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:28,984 INFO L225 Difference]: With dead ends: 67 [2022-11-18 20:43:28,985 INFO L226 Difference]: Without dead ends: 31 [2022-11-18 20:43:28,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:43:28,997 INFO L413 NwaCegarLoop]: 46 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, 46 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:28,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:43:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-18 20:43:29,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-18 20:43:29,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:43:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-11-18 20:43:29,056 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2022-11-18 20:43:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:29,057 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-11-18 20:43:29,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:43:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-11-18 20:43:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-18 20:43:29,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:29,062 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:29,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:29,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 20:43:29,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:29,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:29,270 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2022-11-18 20:43:29,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:29,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792507129] [2022-11-18 20:43:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:29,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:29,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:29,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [350946324] [2022-11-18 20:43:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:29,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:29,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:29,324 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:29,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:43:29,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:29,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:43:29,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:43:29,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:29,679 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:43:29,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:29,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792507129] [2022-11-18 20:43:29,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:29,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350946324] [2022-11-18 20:43:29,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350946324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:29,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:29,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-18 20:43:29,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151537528] [2022-11-18 20:43:29,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:29,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:43:29,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:29,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:43:29,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:43:29,714 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:43:29,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:29,947 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-11-18 20:43:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:43:29,954 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-11-18 20:43:29,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:29,957 INFO L225 Difference]: With dead ends: 48 [2022-11-18 20:43:29,957 INFO L226 Difference]: Without dead ends: 40 [2022-11-18 20:43:29,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:43:29,959 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 22 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:29,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:43:29,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-18 20:43:29,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2022-11-18 20:43:29,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:43:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-11-18 20:43:29,970 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2022-11-18 20:43:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:29,972 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-11-18 20:43:29,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-18 20:43:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-11-18 20:43:29,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 20:43:29,977 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:29,977 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:29,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:30,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:30,184 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:30,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:30,185 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2022-11-18 20:43:30,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:30,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008451079] [2022-11-18 20:43:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:30,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:30,205 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:30,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68595654] [2022-11-18 20:43:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:30,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:30,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:30,208 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:30,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:43:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:30,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-18 20:43:30,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:43:30,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:43:30,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:30,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008451079] [2022-11-18 20:43:30,493 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:30,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68595654] [2022-11-18 20:43:30,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68595654] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:30,494 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:43:30,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-18 20:43:30,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59988810] [2022-11-18 20:43:30,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:43:30,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:43:30,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:30,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:43:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:43:30,498 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:43:30,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:30,585 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-11-18 20:43:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:43:30,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-11-18 20:43:30,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:30,586 INFO L225 Difference]: With dead ends: 39 [2022-11-18 20:43:30,587 INFO L226 Difference]: Without dead ends: 37 [2022-11-18 20:43:30,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:43:30,588 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:30,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:43:30,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-18 20:43:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-18 20:43:30,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-18 20:43:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-11-18 20:43:30,604 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2022-11-18 20:43:30,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:30,605 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-11-18 20:43:30,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-18 20:43:30,605 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-11-18 20:43:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-18 20:43:30,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:30,607 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2022-11-18 20:43:30,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 20:43:30,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:30,808 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:30,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2022-11-18 20:43:30,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:30,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815532838] [2022-11-18 20:43:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:30,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:30,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:30,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1437106215] [2022-11-18 20:43:30,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:30,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:30,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:30,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:30,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:43:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:30,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:43:30,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-18 20:43:31,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-18 20:43:31,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:31,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815532838] [2022-11-18 20:43:31,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:31,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437106215] [2022-11-18 20:43:31,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437106215] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:31,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:43:31,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-18 20:43:31,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056558951] [2022-11-18 20:43:31,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:43:31,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:43:31,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:31,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:43:31,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:43:31,320 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:43:31,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:31,397 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2022-11-18 20:43:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:43:31,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-11-18 20:43:31,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:31,399 INFO L225 Difference]: With dead ends: 50 [2022-11-18 20:43:31,399 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 20:43:31,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:43:31,401 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:31,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:43:31,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 20:43:31,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-18 20:43:31,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 20:43:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-11-18 20:43:31,415 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2022-11-18 20:43:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:31,416 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-11-18 20:43:31,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:43:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-11-18 20:43:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-18 20:43:31,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:31,417 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:31,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:31,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:31,625 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:31,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:31,626 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2022-11-18 20:43:31,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:31,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223600874] [2022-11-18 20:43:31,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:31,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:31,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:31,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526317180] [2022-11-18 20:43:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:31,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:31,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:31,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:31,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:43:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:31,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:43:31,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 20:43:32,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-18 20:43:32,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:32,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223600874] [2022-11-18 20:43:32,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:32,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526317180] [2022-11-18 20:43:32,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526317180] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:32,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:43:32,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-18 20:43:32,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053522479] [2022-11-18 20:43:32,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:43:32,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:43:32,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:43:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:43:32,191 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 20:43:32,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:32,300 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2022-11-18 20:43:32,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:43:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-11-18 20:43:32,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:32,302 INFO L225 Difference]: With dead ends: 54 [2022-11-18 20:43:32,303 INFO L226 Difference]: Without dead ends: 52 [2022-11-18 20:43:32,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:43:32,304 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:32,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:43:32,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-18 20:43:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-18 20:43:32,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 20:43:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-11-18 20:43:32,319 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2022-11-18 20:43:32,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:32,319 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-11-18 20:43:32,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 20:43:32,320 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-11-18 20:43:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-18 20:43:32,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:32,321 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:32,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:32,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:32,528 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:32,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2022-11-18 20:43:32,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:32,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586590592] [2022-11-18 20:43:32,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:32,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:32,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:32,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157860684] [2022-11-18 20:43:32,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:32,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:32,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:32,549 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:32,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:43:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:32,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 20:43:32,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-11-18 20:43:33,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:33,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:33,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586590592] [2022-11-18 20:43:33,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:33,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157860684] [2022-11-18 20:43:33,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157860684] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:33,239 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:43:33,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-18 20:43:33,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559456994] [2022-11-18 20:43:33,240 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:33,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:43:33,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:33,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:43:33,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:43:33,242 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-18 20:43:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:33,548 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2022-11-18 20:43:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:43:33,549 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2022-11-18 20:43:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:33,551 INFO L225 Difference]: With dead ends: 60 [2022-11-18 20:43:33,552 INFO L226 Difference]: Without dead ends: 58 [2022-11-18 20:43:33,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:43:33,555 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:33,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 97 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:43:33,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-18 20:43:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2022-11-18 20:43:33,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-18 20:43:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-11-18 20:43:33,599 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2022-11-18 20:43:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:33,599 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-11-18 20:43:33,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-18 20:43:33,601 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-11-18 20:43:33,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-18 20:43:33,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:33,602 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:33,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:33,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:33,808 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:33,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:33,809 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2022-11-18 20:43:33,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:33,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036490300] [2022-11-18 20:43:33,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:33,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:33,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:33,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229689032] [2022-11-18 20:43:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:33,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:33,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:33,827 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:33,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:43:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:43:33,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 20:43:33,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-18 20:43:34,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:34,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036490300] [2022-11-18 20:43:34,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:34,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229689032] [2022-11-18 20:43:34,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229689032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:34,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:34,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-18 20:43:34,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109351793] [2022-11-18 20:43:34,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:34,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-18 20:43:34,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:34,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-18 20:43:34,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:43:34,149 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-18 20:43:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:34,457 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2022-11-18 20:43:34,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:43:34,458 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2022-11-18 20:43:34,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:34,460 INFO L225 Difference]: With dead ends: 102 [2022-11-18 20:43:34,460 INFO L226 Difference]: Without dead ends: 94 [2022-11-18 20:43:34,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:43:34,466 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:34,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:43:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-18 20:43:34,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2022-11-18 20:43:34,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-11-18 20:43:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2022-11-18 20:43:34,501 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2022-11-18 20:43:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:34,502 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2022-11-18 20:43:34,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-18 20:43:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2022-11-18 20:43:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-18 20:43:34,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:34,504 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:34,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:34,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:34,710 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2022-11-18 20:43:34,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:34,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366793050] [2022-11-18 20:43:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:34,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:34,739 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:34,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [296362098] [2022-11-18 20:43:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:34,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:34,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:34,744 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:34,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:43:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:34,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-18 20:43:34,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-11-18 20:43:35,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-18 20:43:35,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366793050] [2022-11-18 20:43:35,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296362098] [2022-11-18 20:43:35,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296362098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:35,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:35,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2022-11-18 20:43:35,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100907744] [2022-11-18 20:43:35,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:35,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:43:35,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:43:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:43:35,252 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-18 20:43:36,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:36,012 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2022-11-18 20:43:36,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:43:36,013 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2022-11-18 20:43:36,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:36,016 INFO L225 Difference]: With dead ends: 128 [2022-11-18 20:43:36,016 INFO L226 Difference]: Without dead ends: 124 [2022-11-18 20:43:36,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:43:36,018 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:36,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 203 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:43:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-18 20:43:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2022-11-18 20:43:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-18 20:43:36,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2022-11-18 20:43:36,056 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2022-11-18 20:43:36,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:36,057 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2022-11-18 20:43:36,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-11-18 20:43:36,057 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2022-11-18 20:43:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-18 20:43:36,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:36,059 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:36,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:36,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:43:36,265 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:36,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2022-11-18 20:43:36,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:36,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610645171] [2022-11-18 20:43:36,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:36,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:36,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:36,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989365664] [2022-11-18 20:43:36,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:43:36,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:36,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:36,299 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:36,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:43:36,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:43:36,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:36,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-18 20:43:36,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 25 proven. 41 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-18 20:43:37,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:41,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:41,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610645171] [2022-11-18 20:43:41,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:41,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989365664] [2022-11-18 20:43:41,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989365664] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:41,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:43:41,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-18 20:43:41,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193087355] [2022-11-18 20:43:41,816 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:41,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:43:41,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:41,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:43:41,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=316, Unknown=1, NotChecked=0, Total=380 [2022-11-18 20:43:41,817 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-18 20:43:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:42,752 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2022-11-18 20:43:42,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 20:43:42,753 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 76 [2022-11-18 20:43:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:42,758 INFO L225 Difference]: With dead ends: 124 [2022-11-18 20:43:42,758 INFO L226 Difference]: Without dead ends: 122 [2022-11-18 20:43:42,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=80, Invalid=425, Unknown=1, NotChecked=0, Total=506 [2022-11-18 20:43:42,762 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:42,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 146 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:43:42,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-18 20:43:42,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2022-11-18 20:43:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 68 states have internal predecessors, (77), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-18 20:43:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2022-11-18 20:43:42,834 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 76 [2022-11-18 20:43:42,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:42,836 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2022-11-18 20:43:42,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-18 20:43:42,836 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2022-11-18 20:43:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-18 20:43:42,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:42,847 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:42,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:43,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:43,054 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:43,055 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2022-11-18 20:43:43,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:43,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987957256] [2022-11-18 20:43:43,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:43,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:43,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:43,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834346792] [2022-11-18 20:43:43,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:43:43,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:43,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:43,094 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:43,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:43:43,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:43:43,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:43:43,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:43:43,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2022-11-18 20:43:43,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:48,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:48,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987957256] [2022-11-18 20:43:48,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:48,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834346792] [2022-11-18 20:43:48,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834346792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:43:48,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:43:48,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-18 20:43:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897966172] [2022-11-18 20:43:48,664 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:48,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:43:48,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:43:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:43:48,666 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 20:43:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:43:49,719 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2022-11-18 20:43:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:43:49,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2022-11-18 20:43:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:43:49,722 INFO L225 Difference]: With dead ends: 128 [2022-11-18 20:43:49,722 INFO L226 Difference]: Without dead ends: 126 [2022-11-18 20:43:49,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:43:49,724 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:43:49,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 146 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:43:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-18 20:43:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-11-18 20:43:49,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-18 20:43:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2022-11-18 20:43:49,769 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2022-11-18 20:43:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:43:49,770 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2022-11-18 20:43:49,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-18 20:43:49,771 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2022-11-18 20:43:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-18 20:43:49,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:43:49,773 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:43:49,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:43:49,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:43:49,979 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:43:49,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:43:49,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2022-11-18 20:43:49,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:43:49,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959753587] [2022-11-18 20:43:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:49,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:43:49,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:43:50,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492806738] [2022-11-18 20:43:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:43:50,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:43:50,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:50,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:43:50,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:43:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:43:50,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-18 20:43:50,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:43:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-11-18 20:43:50,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:43:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-18 20:43:52,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:43:52,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959753587] [2022-11-18 20:43:52,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:43:52,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492806738] [2022-11-18 20:43:52,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492806738] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:43:52,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:43:52,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-11-18 20:43:52,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499689005] [2022-11-18 20:43:52,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:43:52,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:43:52,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:43:52,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:43:52,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:43:52,420 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-18 20:44:05,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:05,553 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2022-11-18 20:44:05,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 20:44:05,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 87 [2022-11-18 20:44:05,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:05,555 INFO L225 Difference]: With dead ends: 208 [2022-11-18 20:44:05,555 INFO L226 Difference]: Without dead ends: 204 [2022-11-18 20:44:05,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:44:05,557 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 112 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:05,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 363 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 965 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-11-18 20:44:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-18 20:44:05,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2022-11-18 20:44:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 107 states have internal predecessors, (127), 79 states have call successors, (79), 14 states have call predecessors, (79), 14 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2022-11-18 20:44:05,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 284 transitions. [2022-11-18 20:44:05,642 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 284 transitions. Word has length 87 [2022-11-18 20:44:05,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:05,643 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 284 transitions. [2022-11-18 20:44:05,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-18 20:44:05,643 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 284 transitions. [2022-11-18 20:44:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:44:05,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:05,645 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:05,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 20:44:05,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:44:05,852 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:05,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:05,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1140726838, now seen corresponding path program 4 times [2022-11-18 20:44:05,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:05,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506213360] [2022-11-18 20:44:05,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:05,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:05,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:44:05,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597982500] [2022-11-18 20:44:05,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:44:05,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:05,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:05,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:05,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:44:05,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:44:05,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:44:05,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 20:44:05,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-18 20:44:06,014 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:44:06,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:06,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506213360] [2022-11-18 20:44:06,015 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:44:06,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597982500] [2022-11-18 20:44:06,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597982500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:06,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:06,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:44:06,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62675936] [2022-11-18 20:44:06,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:06,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:44:06,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:44:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:44:06,019 INFO L87 Difference]: Start difference. First operand 200 states and 284 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-18 20:44:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:06,231 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2022-11-18 20:44:06,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:44:06,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 101 [2022-11-18 20:44:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:06,233 INFO L225 Difference]: With dead ends: 253 [2022-11-18 20:44:06,233 INFO L226 Difference]: Without dead ends: 181 [2022-11-18 20:44:06,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:44:06,235 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:06,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:44:06,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-18 20:44:06,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2022-11-18 20:44:06,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 89 states have (on average 1.146067415730337) internal successors, (102), 90 states have internal predecessors, (102), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2022-11-18 20:44:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2022-11-18 20:44:06,294 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 101 [2022-11-18 20:44:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:06,295 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2022-11-18 20:44:06,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-18 20:44:06,296 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2022-11-18 20:44:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-18 20:44:06,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:06,298 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:06,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:44:06,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:44:06,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:06,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:06,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2022-11-18 20:44:06,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:06,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775633019] [2022-11-18 20:44:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:06,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:06,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:44:06,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103943490] [2022-11-18 20:44:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:06,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:06,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:06,518 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:06,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:44:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:06,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 20:44:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-11-18 20:44:07,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:09,389 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-11-18 20:44:09,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:09,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775633019] [2022-11-18 20:44:09,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:44:09,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103943490] [2022-11-18 20:44:09,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103943490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:09,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:44:09,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2022-11-18 20:44:09,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489809320] [2022-11-18 20:44:09,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:09,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:44:09,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:09,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:44:09,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:44:09,393 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-18 20:44:12,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:32,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:39,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:44:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:49,727 INFO L93 Difference]: Finished difference Result 209 states and 287 transitions. [2022-11-18 20:44:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:44:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 103 [2022-11-18 20:44:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:49,730 INFO L225 Difference]: With dead ends: 209 [2022-11-18 20:44:49,730 INFO L226 Difference]: Without dead ends: 207 [2022-11-18 20:44:49,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:44:49,732 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 100 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 142 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:49,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 210 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1133 Invalid, 2 Unknown, 0 Unchecked, 23.1s Time] [2022-11-18 20:44:49,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-18 20:44:49,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2022-11-18 20:44:49,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 108 states have internal predecessors, (121), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2022-11-18 20:44:49,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 270 transitions. [2022-11-18 20:44:49,841 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 270 transitions. Word has length 103 [2022-11-18 20:44:49,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:49,842 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 270 transitions. [2022-11-18 20:44:49,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2022-11-18 20:44:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 270 transitions. [2022-11-18 20:44:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-18 20:44:49,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:49,844 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:44:49,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:44:50,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:44:50,051 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:44:50,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:50,051 INFO L85 PathProgramCache]: Analyzing trace with hash -349873392, now seen corresponding path program 2 times [2022-11-18 20:44:50,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:50,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49635923] [2022-11-18 20:44:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:50,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:50,065 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:44:50,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706702056] [2022-11-18 20:44:50,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:44:50,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:50,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:50,067 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:50,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:44:50,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:44:50,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:44:50,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-18 20:44:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-11-18 20:44:51,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 57 proven. 42 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-11-18 20:44:52,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:52,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49635923] [2022-11-18 20:44:52,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:44:52,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706702056] [2022-11-18 20:44:52,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706702056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:52,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:44:52,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2022-11-18 20:44:52,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357141201] [2022-11-18 20:44:52,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:52,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:44:52,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:52,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:44:52,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:44:52,262 INFO L87 Difference]: Start difference. First operand 197 states and 270 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-11-18 20:45:20,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:20,762 INFO L93 Difference]: Finished difference Result 278 states and 390 transitions. [2022-11-18 20:45:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:45:20,763 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 120 [2022-11-18 20:45:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:20,764 INFO L225 Difference]: With dead ends: 278 [2022-11-18 20:45:20,764 INFO L226 Difference]: Without dead ends: 276 [2022-11-18 20:45:20,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 20:45:20,766 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 120 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1541 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:20,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 290 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1541 Invalid, 0 Unknown, 0 Unchecked, 15.4s Time] [2022-11-18 20:45:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-18 20:45:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 244. [2022-11-18 20:45:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 136 states have internal predecessors, (152), 93 states have call successors, (93), 18 states have call predecessors, (93), 18 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-18 20:45:20,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2022-11-18 20:45:20,928 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 120 [2022-11-18 20:45:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:20,928 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2022-11-18 20:45:20,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2022-11-18 20:45:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2022-11-18 20:45:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 20:45:20,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:20,930 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:20,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:21,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:21,130 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:21,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:21,131 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 3 times [2022-11-18 20:45:21,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:21,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370447137] [2022-11-18 20:45:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:21,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:21,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:21,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616196163] [2022-11-18 20:45:21,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:45:21,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:21,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:21,149 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:21,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:45:21,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:45:21,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:21,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-18 20:45:21,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 81 proven. 38 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2022-11-18 20:45:21,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 67 proven. 29 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-11-18 20:45:22,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370447137] [2022-11-18 20:45:22,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:22,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616196163] [2022-11-18 20:45:22,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616196163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:45:22,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:45:22,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2022-11-18 20:45:22,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681907509] [2022-11-18 20:45:22,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:22,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:45:22,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:22,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:45:22,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:45:22,662 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2022-11-18 20:45:25,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:25,331 INFO L93 Difference]: Finished difference Result 283 states and 394 transitions. [2022-11-18 20:45:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:45:25,332 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) Word has length 123 [2022-11-18 20:45:25,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:25,334 INFO L225 Difference]: With dead ends: 283 [2022-11-18 20:45:25,334 INFO L226 Difference]: Without dead ends: 281 [2022-11-18 20:45:25,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:45:25,336 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:25,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 263 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-18 20:45:25,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-18 20:45:25,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 248. [2022-11-18 20:45:25,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 139 states have internal predecessors, (155), 93 states have call successors, (93), 19 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2022-11-18 20:45:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 340 transitions. [2022-11-18 20:45:25,504 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 340 transitions. Word has length 123 [2022-11-18 20:45:25,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:25,505 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 340 transitions. [2022-11-18 20:45:25,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2022-11-18 20:45:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 340 transitions. [2022-11-18 20:45:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-18 20:45:25,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:25,508 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:25,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:25,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:45:25,714 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:25,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:25,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2022-11-18 20:45:25,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:25,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013668899] [2022-11-18 20:45:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:25,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:25,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:25,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844299265] [2022-11-18 20:45:25,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:45:25,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:25,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:25,734 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:25,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:45:25,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:45:25,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:25,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-18 20:45:25,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 113 proven. 94 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-11-18 20:45:27,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:45:29,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:45:29,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013668899] [2022-11-18 20:45:29,543 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:45:29,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844299265] [2022-11-18 20:45:29,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844299265] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:45:29,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:45:29,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-11-18 20:45:29,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451751358] [2022-11-18 20:45:29,545 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:45:29,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:45:29,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:45:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:45:29,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:45:29,546 INFO L87 Difference]: Start difference. First operand 248 states and 340 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-18 20:45:31,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:45:31,752 INFO L93 Difference]: Finished difference Result 304 states and 411 transitions. [2022-11-18 20:45:31,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:45:31,754 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 134 [2022-11-18 20:45:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:45:31,756 INFO L225 Difference]: With dead ends: 304 [2022-11-18 20:45:31,756 INFO L226 Difference]: Without dead ends: 297 [2022-11-18 20:45:31,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:45:31,757 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 53 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:45:31,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 299 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 20:45:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-18 20:45:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 291. [2022-11-18 20:45:31,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 162 states have internal predecessors, (181), 109 states have call successors, (109), 23 states have call predecessors, (109), 23 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-18 20:45:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 398 transitions. [2022-11-18 20:45:31,971 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 398 transitions. Word has length 134 [2022-11-18 20:45:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:45:31,972 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 398 transitions. [2022-11-18 20:45:31,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-18 20:45:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 398 transitions. [2022-11-18 20:45:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-18 20:45:31,975 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:45:31,975 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:45:31,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:45:32,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:45:32,191 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:45:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:45:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 4 times [2022-11-18 20:45:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:45:32,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605434993] [2022-11-18 20:45:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:45:32,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:45:32,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:45:32,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225741820] [2022-11-18 20:45:32,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:45:32,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:45:32,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:45:32,204 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:45:32,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:45:32,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:45:32,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:45:32,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-18 20:45:32,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:45:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 165 proven. 161 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2022-11-18 20:45:34,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:18,345 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse1 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse0 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse13 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse9 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse11 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse8 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse10 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse5 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse4 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~r~0#1|))) (or (not (= (+ .cse0 .cse1) (+ |c_ULTIMATE.start_main_~c~0#1| .cse2 .cse3))) (not (= (+ .cse4 .cse5 .cse6 .cse7) (+ .cse8 .cse9 .cse10 .cse11))) (<= (+ (* 3 .cse1) (* 3 .cse0)) (+ .cse12 .cse13 (* 3 .cse2) (* 3 .cse3))) (not (= (+ .cse12 .cse13) |c_ULTIMATE.start_main_~b~0#1|)) (= (+ (* .cse9 2) (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 2 .cse11) (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* .cse8 2) (* .cse10 2)) (+ (* 2 .cse7) (* 2 .cse6) (* 2 .cse5) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|) (* 2 .cse4))) (<= |c_ULTIMATE.start_main_~b~0#1| |c_ULTIMATE.start_main_~c~0#1|))) is different from true [2022-11-18 20:46:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 193 proven. 76 refuted. 12 times theorem prover too weak. 561 trivial. 3 not checked. [2022-11-18 20:46:33,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605434993] [2022-11-18 20:46:33,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:46:33,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225741820] [2022-11-18 20:46:33,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225741820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:33,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:46:33,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 33 [2022-11-18 20:46:33,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502740962] [2022-11-18 20:46:33,256 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:33,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:46:33,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:46:33,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=797, Unknown=16, NotChecked=60, Total=1056 [2022-11-18 20:46:33,258 INFO L87 Difference]: Start difference. First operand 291 states and 398 transitions. Second operand has 33 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 26 states have internal predecessors, (59), 14 states have call successors, (49), 3 states have call predecessors, (49), 4 states have return successors, (48), 17 states have call predecessors, (48), 13 states have call successors, (48) [2022-11-18 20:46:36,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:46:38,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:46:41,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:46:43,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:46:46,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:46:51,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:46:54,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:47:00,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:47:02,625 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:08,415 WARN L233 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 88 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:48:13,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:16,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:19,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:21,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:23,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:25,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:35,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:48:54,710 WARN L233 SmtUtils]: Spent 16.60s on a formula simplification. DAG size of input: 70 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:50:05,119 WARN L233 SmtUtils]: Spent 1.16m on a formula simplification. DAG size of input: 87 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:50:07,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:50:09,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:50:12,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:50:16,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:50:18,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:50:25,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:50:27,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:03,878 WARN L233 SmtUtils]: Spent 34.21s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:51:06,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:22,749 WARN L233 SmtUtils]: Spent 11.73s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:51:24,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:26,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:28,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:36,638 WARN L233 SmtUtils]: Spent 5.09s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:51:42,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:45,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:48,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:50,642 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:56,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:51:58,469 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:52:00,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:52:02,948 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:52:05,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:52:08,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:52:10,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:52:12,572 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:52:14,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:52:23,097 WARN L233 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:52:30,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:52:52,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:52:54,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:53:21,381 WARN L233 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 66 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:53:23,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:53:27,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:53:37,763 WARN L233 SmtUtils]: Spent 8.28s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:53:40,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.48s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:53:42,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:53:44,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:53:46,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:53:49,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:53:52,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:53:54,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:53:57,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:54:05,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:54:08,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:54:08,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:08,929 INFO L93 Difference]: Finished difference Result 330 states and 447 transitions. [2022-11-18 20:54:08,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-18 20:54:08,931 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 26 states have internal predecessors, (59), 14 states have call successors, (49), 3 states have call predecessors, (49), 4 states have return successors, (48), 17 states have call predecessors, (48), 13 states have call successors, (48) Word has length 150 [2022-11-18 20:54:08,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:08,933 INFO L225 Difference]: With dead ends: 330 [2022-11-18 20:54:08,933 INFO L226 Difference]: Without dead ends: 328 [2022-11-18 20:54:08,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 278 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 357.5s TimeCoverageRelationStatistics Valid=657, Invalid=2282, Unknown=35, NotChecked=106, Total=3080 [2022-11-18 20:54:08,935 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 187 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 285 mSolverCounterUnsat, 51 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 140.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 2083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 51 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 141.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:08,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 280 Invalid, 2083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1502 Invalid, 51 Unknown, 245 Unchecked, 141.2s Time] [2022-11-18 20:54:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-11-18 20:54:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 319. [2022-11-18 20:54:09,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 175 states have (on average 1.1371428571428572) internal successors, (199), 181 states have internal predecessors, (199), 118 states have call successors, (118), 25 states have call predecessors, (118), 25 states have return successors, (117), 112 states have call predecessors, (117), 117 states have call successors, (117) [2022-11-18 20:54:09,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 434 transitions. [2022-11-18 20:54:09,248 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 434 transitions. Word has length 150 [2022-11-18 20:54:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:09,249 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 434 transitions. [2022-11-18 20:54:09,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 26 states have internal predecessors, (59), 14 states have call successors, (49), 3 states have call predecessors, (49), 4 states have return successors, (48), 17 states have call predecessors, (48), 13 states have call successors, (48) [2022-11-18 20:54:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 434 transitions. [2022-11-18 20:54:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-11-18 20:54:09,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:09,252 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:09,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:09,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:54:09,459 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:54:09,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:09,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 3 times [2022-11-18 20:54:09,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:09,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561941146] [2022-11-18 20:54:09,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:09,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:09,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:54:09,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376619779] [2022-11-18 20:54:09,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:54:09,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:09,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:09,475 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:54:09,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:54:09,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:54:09,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:54:09,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 20:54:09,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 99 proven. 31 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2022-11-18 20:54:10,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:10,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:10,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561941146] [2022-11-18 20:54:10,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:54:10,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376619779] [2022-11-18 20:54:10,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376619779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:54:10,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:54:10,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-18 20:54:10,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407754719] [2022-11-18 20:54:10,489 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:10,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:54:10,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:10,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:54:10,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:54:10,490 INFO L87 Difference]: Start difference. First operand 319 states and 434 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-18 20:54:11,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:54:11,317 INFO L93 Difference]: Finished difference Result 365 states and 497 transitions. [2022-11-18 20:54:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:54:11,318 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 153 [2022-11-18 20:54:11,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:54:11,320 INFO L225 Difference]: With dead ends: 365 [2022-11-18 20:54:11,320 INFO L226 Difference]: Without dead ends: 358 [2022-11-18 20:54:11,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:54:11,322 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:54:11,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 168 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:54:11,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-18 20:54:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 339. [2022-11-18 20:54:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 185 states have (on average 1.135135135135135) internal successors, (210), 191 states have internal predecessors, (210), 126 states have call successors, (126), 27 states have call predecessors, (126), 27 states have return successors, (125), 120 states have call predecessors, (125), 125 states have call successors, (125) [2022-11-18 20:54:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 461 transitions. [2022-11-18 20:54:11,854 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 461 transitions. Word has length 153 [2022-11-18 20:54:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:54:11,854 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 461 transitions. [2022-11-18 20:54:11,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-18 20:54:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 461 transitions. [2022-11-18 20:54:11,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-18 20:54:11,859 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:54:11,860 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:54:11,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-18 20:54:12,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:54:12,065 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:54:12,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:54:12,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2018058068, now seen corresponding path program 4 times [2022-11-18 20:54:12,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:54:12,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426360979] [2022-11-18 20:54:12,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:54:12,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:54:12,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:54:12,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821120297] [2022-11-18 20:54:12,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:54:12,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:54:12,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:54:12,077 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:54:12,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:54:12,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:54:12,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:54:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-18 20:54:12,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:54:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 46 proven. 76 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-11-18 20:54:13,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:54:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-11-18 20:54:16,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:54:16,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426360979] [2022-11-18 20:54:16,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:54:16,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821120297] [2022-11-18 20:54:16,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821120297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:54:16,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:54:16,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-11-18 20:54:16,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966384175] [2022-11-18 20:54:16,074 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:54:16,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 20:54:16,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:54:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 20:54:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:54:16,076 INFO L87 Difference]: Start difference. First operand 339 states and 461 transitions. Second operand has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 16 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 14 states have call predecessors, (50), 14 states have call successors, (50) [2022-11-18 20:55:06,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:55:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:55:22,402 INFO L93 Difference]: Finished difference Result 506 states and 727 transitions. [2022-11-18 20:55:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:55:22,402 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 16 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 14 states have call predecessors, (50), 14 states have call successors, (50) Word has length 156 [2022-11-18 20:55:22,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:55:22,405 INFO L225 Difference]: With dead ends: 506 [2022-11-18 20:55:22,406 INFO L226 Difference]: Without dead ends: 498 [2022-11-18 20:55:22,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=950, Invalid=4600, Unknown=0, NotChecked=0, Total=5550 [2022-11-18 20:55:22,408 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 265 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 30.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:55:22,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 728 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 30.4s Time] [2022-11-18 20:55:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-18 20:55:23,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 453. [2022-11-18 20:55:23,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 232 states have (on average 1.168103448275862) internal successors, (271), 238 states have internal predecessors, (271), 190 states have call successors, (190), 30 states have call predecessors, (190), 30 states have return successors, (189), 184 states have call predecessors, (189), 189 states have call successors, (189) [2022-11-18 20:55:23,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 650 transitions. [2022-11-18 20:55:23,046 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 650 transitions. Word has length 156 [2022-11-18 20:55:23,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:55:23,046 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 650 transitions. [2022-11-18 20:55:23,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 16 states have call successors, (51), 3 states have call predecessors, (51), 2 states have return successors, (50), 14 states have call predecessors, (50), 14 states have call successors, (50) [2022-11-18 20:55:23,047 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 650 transitions. [2022-11-18 20:55:23,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-18 20:55:23,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:55:23,049 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:55:23,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:55:23,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:23,256 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:55:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:55:23,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1664660918, now seen corresponding path program 5 times [2022-11-18 20:55:23,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:55:23,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825924291] [2022-11-18 20:55:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:55:23,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:55:23,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:55:23,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936306895] [2022-11-18 20:55:23,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:55:23,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:55:23,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:55:23,269 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:55:23,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:55:23,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-18 20:55:23,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:55:23,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:55:23,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:55:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-11-18 20:55:24,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:55:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-11-18 20:55:33,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:55:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825924291] [2022-11-18 20:55:33,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:55:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936306895] [2022-11-18 20:55:33,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936306895] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:55:33,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:55:33,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-18 20:55:33,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139770240] [2022-11-18 20:55:33,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:55:33,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:55:33,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:55:33,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:55:33,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:55:33,505 INFO L87 Difference]: Start difference. First operand 453 states and 650 transitions. Second operand has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) [2022-11-18 20:56:08,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:56:49,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:56:49,680 INFO L93 Difference]: Finished difference Result 722 states and 1091 transitions. [2022-11-18 20:56:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:56:49,681 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) Word has length 156 [2022-11-18 20:56:49,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:56:49,685 INFO L225 Difference]: With dead ends: 722 [2022-11-18 20:56:49,685 INFO L226 Difference]: Without dead ends: 714 [2022-11-18 20:56:49,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2040 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=1178, Invalid=6654, Unknown=0, NotChecked=0, Total=7832 [2022-11-18 20:56:49,688 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 151 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 2666 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 2666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:56:49,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1107 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 2666 Invalid, 0 Unknown, 0 Unchecked, 31.7s Time] [2022-11-18 20:56:49,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-11-18 20:56:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 567. [2022-11-18 20:56:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 284 states have (on average 1.1725352112676057) internal successors, (333), 289 states have internal predecessors, (333), 250 states have call successors, (250), 32 states have call predecessors, (250), 32 states have return successors, (249), 245 states have call predecessors, (249), 249 states have call successors, (249) [2022-11-18 20:56:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 832 transitions. [2022-11-18 20:56:50,517 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 832 transitions. Word has length 156 [2022-11-18 20:56:50,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:56:50,518 INFO L495 AbstractCegarLoop]: Abstraction has 567 states and 832 transitions. [2022-11-18 20:56:50,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) [2022-11-18 20:56:50,518 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 832 transitions. [2022-11-18 20:56:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-11-18 20:56:50,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:56:50,521 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:56:50,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:56:50,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:50,727 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:56:50,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:56:50,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 5 times [2022-11-18 20:56:50,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:56:50,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674871691] [2022-11-18 20:56:50,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:56:50,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:56:50,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:56:50,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354516964] [2022-11-18 20:56:50,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:56:50,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:56:50,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:56:50,748 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:56:50,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:56:54,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 20:56:54,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:56:54,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 20:56:54,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:56:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 131 proven. 285 refuted. 0 times theorem prover too weak. 802 trivial. 0 not checked. [2022-11-18 20:56:57,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:56:57,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:56:57,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674871691] [2022-11-18 20:56:57,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:56:57,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354516964] [2022-11-18 20:56:57,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354516964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:56:57,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:56:57,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-11-18 20:56:57,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393304068] [2022-11-18 20:56:57,811 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:56:57,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:56:57,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:56:57,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:56:57,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:56:57,812 INFO L87 Difference]: Start difference. First operand 567 states and 832 transitions. Second operand has 21 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2022-11-18 20:57:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:04,203 INFO L93 Difference]: Finished difference Result 657 states and 949 transitions. [2022-11-18 20:57:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:57:04,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) Word has length 175 [2022-11-18 20:57:04,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:04,207 INFO L225 Difference]: With dead ends: 657 [2022-11-18 20:57:04,207 INFO L226 Difference]: Without dead ends: 548 [2022-11-18 20:57:04,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:57:04,209 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 32 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:04,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 427 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-18 20:57:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-11-18 20:57:04,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 546. [2022-11-18 20:57:04,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 275 states have (on average 1.1672727272727272) internal successors, (321), 280 states have internal predecessors, (321), 238 states have call successors, (238), 32 states have call predecessors, (238), 32 states have return successors, (237), 233 states have call predecessors, (237), 237 states have call successors, (237) [2022-11-18 20:57:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 796 transitions. [2022-11-18 20:57:04,989 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 796 transitions. Word has length 175 [2022-11-18 20:57:04,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:04,989 INFO L495 AbstractCegarLoop]: Abstraction has 546 states and 796 transitions. [2022-11-18 20:57:04,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.0) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 12 states have call predecessors, (29), 9 states have call successors, (29) [2022-11-18 20:57:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 796 transitions. [2022-11-18 20:57:04,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-11-18 20:57:04,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:04,993 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:05,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:05,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:05,205 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:05,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:05,206 INFO L85 PathProgramCache]: Analyzing trace with hash -765875114, now seen corresponding path program 6 times [2022-11-18 20:57:05,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:05,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388121548] [2022-11-18 20:57:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:05,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:05,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:57:05,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850660030] [2022-11-18 20:57:05,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:57:05,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:05,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:05,238 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:05,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:57:05,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-18 20:57:05,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:57:05,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-18 20:57:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 183 proven. 171 refuted. 0 times theorem prover too weak. 1407 trivial. 0 not checked. [2022-11-18 20:57:11,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:21,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:21,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388121548] [2022-11-18 20:57:21,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:57:21,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850660030] [2022-11-18 20:57:21,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850660030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:21,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:57:21,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-11-18 20:57:21,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863653166] [2022-11-18 20:57:21,846 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:21,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:57:21,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:21,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:57:21,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=999, Unknown=1, NotChecked=0, Total=1190 [2022-11-18 20:57:21,847 INFO L87 Difference]: Start difference. First operand 546 states and 796 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 7 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-18 20:57:24,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:57:34,123 WARN L233 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 39 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:57:36,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-18 20:57:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:57:37,253 INFO L93 Difference]: Finished difference Result 638 states and 915 transitions. [2022-11-18 20:57:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:57:37,256 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 7 states have call predecessors, (26), 9 states have call successors, (26) Word has length 200 [2022-11-18 20:57:37,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:57:37,259 INFO L225 Difference]: With dead ends: 638 [2022-11-18 20:57:37,259 INFO L226 Difference]: Without dead ends: 631 [2022-11-18 20:57:37,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=243, Invalid=1316, Unknown=1, NotChecked=0, Total=1560 [2022-11-18 20:57:37,261 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 59 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:57:37,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 292 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-11-18 20:57:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-11-18 20:57:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 620. [2022-11-18 20:57:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 314 states have (on average 1.1656050955414012) internal successors, (366), 318 states have internal predecessors, (366), 266 states have call successors, (266), 39 states have call predecessors, (266), 39 states have return successors, (265), 262 states have call predecessors, (265), 265 states have call successors, (265) [2022-11-18 20:57:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 897 transitions. [2022-11-18 20:57:38,203 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 897 transitions. Word has length 200 [2022-11-18 20:57:38,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:57:38,203 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 897 transitions. [2022-11-18 20:57:38,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 7 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-18 20:57:38,204 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 897 transitions. [2022-11-18 20:57:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-11-18 20:57:38,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:57:38,207 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:57:38,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:57:38,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:38,414 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:57:38,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:57:38,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1471252415, now seen corresponding path program 7 times [2022-11-18 20:57:38,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:57:38,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243080621] [2022-11-18 20:57:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:57:38,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:57:38,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:57:38,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920218081] [2022-11-18 20:57:38,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:57:38,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:57:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:57:38,428 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:57:38,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:57:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:57:38,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-18 20:57:38,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:57:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1769 backedges. 216 proven. 152 refuted. 0 times theorem prover too weak. 1401 trivial. 0 not checked. [2022-11-18 20:57:42,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:57:51,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:57:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243080621] [2022-11-18 20:57:51,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:57:51,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920218081] [2022-11-18 20:57:51,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920218081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:57:51,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:57:51,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-11-18 20:57:51,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170142223] [2022-11-18 20:57:51,347 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:57:51,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:57:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:57:51,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:57:51,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:57:51,348 INFO L87 Difference]: Start difference. First operand 620 states and 897 transitions. Second operand has 25 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-18 20:58:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:00,634 INFO L93 Difference]: Finished difference Result 680 states and 971 transitions. [2022-11-18 20:58:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:58:00,635 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 11 states have call successors, (34) Word has length 203 [2022-11-18 20:58:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:00,638 INFO L225 Difference]: With dead ends: 680 [2022-11-18 20:58:00,639 INFO L226 Difference]: Without dead ends: 673 [2022-11-18 20:58:00,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=335, Invalid=2215, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 20:58:00,641 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 73 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1806 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:00,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 335 Invalid, 1921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1806 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-11-18 20:58:00,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-11-18 20:58:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 667. [2022-11-18 20:58:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 340 states have (on average 1.161764705882353) internal successors, (395), 344 states have internal predecessors, (395), 282 states have call successors, (282), 44 states have call predecessors, (282), 44 states have return successors, (281), 278 states have call predecessors, (281), 281 states have call successors, (281) [2022-11-18 20:58:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 958 transitions. [2022-11-18 20:58:01,665 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 958 transitions. Word has length 203 [2022-11-18 20:58:01,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:01,667 INFO L495 AbstractCegarLoop]: Abstraction has 667 states and 958 transitions. [2022-11-18 20:58:01,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 12 states have call successors, (35), 2 states have call predecessors, (35), 3 states have return successors, (34), 12 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-18 20:58:01,668 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 958 transitions. [2022-11-18 20:58:01,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-18 20:58:01,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:01,671 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:01,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:01,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:01,883 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:01,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:01,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1100875798, now seen corresponding path program 6 times [2022-11-18 20:58:01,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:01,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063766941] [2022-11-18 20:58:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:01,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:01,896 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:58:01,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712298457] [2022-11-18 20:58:01,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:58:01,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:01,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:01,898 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:01,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:58:03,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-18 20:58:03,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:58:03,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-18 20:58:03,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 301 proven. 177 refuted. 0 times theorem prover too weak. 1672 trivial. 0 not checked. [2022-11-18 20:58:10,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:58:12,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:58:12,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063766941] [2022-11-18 20:58:12,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:58:12,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712298457] [2022-11-18 20:58:12,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712298457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:58:12,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:58:12,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-11-18 20:58:12,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978564625] [2022-11-18 20:58:12,642 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:58:12,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-18 20:58:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:58:12,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-18 20:58:12,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:58:12,643 INFO L87 Difference]: Start difference. First operand 667 states and 958 transitions. Second operand has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-18 20:58:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:58:15,528 INFO L93 Difference]: Finished difference Result 751 states and 1076 transitions. [2022-11-18 20:58:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:58:15,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 216 [2022-11-18 20:58:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:58:15,533 INFO L225 Difference]: With dead ends: 751 [2022-11-18 20:58:15,533 INFO L226 Difference]: Without dead ends: 749 [2022-11-18 20:58:15,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:58:15,535 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 49 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:58:15,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 188 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 574 Invalid, 0 Unknown, 64 Unchecked, 1.2s Time] [2022-11-18 20:58:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-11-18 20:58:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 745. [2022-11-18 20:58:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 383 states have (on average 1.1618798955613576) internal successors, (445), 390 states have internal predecessors, (445), 313 states have call successors, (313), 48 states have call predecessors, (313), 48 states have return successors, (312), 306 states have call predecessors, (312), 312 states have call successors, (312) [2022-11-18 20:58:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 1070 transitions. [2022-11-18 20:58:16,736 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 1070 transitions. Word has length 216 [2022-11-18 20:58:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:58:16,737 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 1070 transitions. [2022-11-18 20:58:16,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 9 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-18 20:58:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 1070 transitions. [2022-11-18 20:58:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-11-18 20:58:16,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:58:16,741 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:58:16,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:58:16,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:16,949 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:58:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:58:16,949 INFO L85 PathProgramCache]: Analyzing trace with hash 2126539061, now seen corresponding path program 7 times [2022-11-18 20:58:16,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:58:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585160770] [2022-11-18 20:58:16,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:58:16,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:58:16,970 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:58:16,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579816822] [2022-11-18 20:58:16,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:58:16,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:58:16,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:58:16,971 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:58:16,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e9d22f-ba26-4975-939f-e96bd2a4ecef/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:58:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:58:17,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-18 20:58:17,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:58:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 305 proven. 209 refuted. 0 times theorem prover too weak. 1644 trivial. 0 not checked. [2022-11-18 20:58:22,488 INFO L328 TraceCheckSpWp]: Computing backward predicates...