./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN --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 deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 --- 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-6b4ec56 [2022-11-20 09:27:26,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 09:27:26,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 09:27:26,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 09:27:26,687 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 09:27:26,689 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 09:27:26,690 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 09:27:26,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 09:27:26,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 09:27:26,695 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 09:27:26,696 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 09:27:26,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 09:27:26,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 09:27:26,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 09:27:26,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 09:27:26,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 09:27:26,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 09:27:26,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 09:27:26,708 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 09:27:26,710 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 09:27:26,711 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 09:27:26,713 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 09:27:26,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 09:27:26,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 09:27:26,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 09:27:26,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 09:27:26,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 09:27:26,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 09:27:26,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 09:27:26,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 09:27:26,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 09:27:26,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 09:27:26,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 09:27:26,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 09:27:26,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 09:27:26,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 09:27:26,728 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 09:27:26,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 09:27:26,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 09:27:26,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 09:27:26,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 09:27:26,731 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 09:27:26,753 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 09:27:26,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 09:27:26,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 09:27:26,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 09:27:26,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 09:27:26,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 09:27:26,756 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 09:27:26,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 09:27:26,757 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 09:27:26,757 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 09:27:26,757 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 09:27:26,757 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 09:27:26,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 09:27:26,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 09:27:26,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 09:27:26,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 09:27:26,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 09:27:26,759 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 09:27:26,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 09:27:26,759 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 09:27:26,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 09:27:26,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 09:27:26,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 09:27:26,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 09:27:26,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:26,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 09:27:26,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 09:27:26,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 09:27:26,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 09:27:26,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 09:27:26,762 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 09:27:26,762 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 09:27:26,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 09:27:26,763 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_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> deef9b1f63fa90bdeace0bbb769d25578ef53bda95c70ad5e444555427b2b0e2 [2022-11-20 09:27:27,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 09:27:27,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 09:27:27,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 09:27:27,151 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 09:27:27,152 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 09:27:27,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2022-11-20 09:27:30,380 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 09:27:30,624 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 09:27:30,625 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c [2022-11-20 09:27:30,632 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/data/b1a948a84/8b9d69d5651b4b3da352dcdc27999e92/FLAG9f3c5241c [2022-11-20 09:27:30,646 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/data/b1a948a84/8b9d69d5651b4b3da352dcdc27999e92 [2022-11-20 09:27:30,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 09:27:30,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 09:27:30,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:30,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 09:27:30,656 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 09:27:30,657 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:30,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20a0db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30, skipping insertion in model container [2022-11-20 09:27:30,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:30,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 09:27:30,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 09:27:30,891 WARN L237 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_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2022-11-20 09:27:30,940 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:30,954 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 09:27:30,966 WARN L237 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_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_unwindbound50.c[490,503] [2022-11-20 09:27:30,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 09:27:30,988 INFO L208 MainTranslator]: Completed translation [2022-11-20 09:27:30,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30 WrapperNode [2022-11-20 09:27:30,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 09:27:30,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:30,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 09:27:30,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 09:27:30,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,024 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2022-11-20 09:27:31,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 09:27:31,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 09:27:31,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 09:27:31,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 09:27:31,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,036 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,050 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,059 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,060 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 09:27:31,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 09:27:31,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 09:27:31,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 09:27:31,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (1/1) ... [2022-11-20 09:27:31,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 09:27:31,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:31,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 09:27:31,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 09:27:31,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 09:27:31,159 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-20 09:27:31,160 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-20 09:27:31,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 09:27:31,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 09:27:31,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 09:27:31,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 09:27:31,161 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 09:27:31,256 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 09:27:31,259 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 09:27:31,554 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 09:27:31,570 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 09:27:31,577 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 09:27:31,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:31 BoogieIcfgContainer [2022-11-20 09:27:31,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 09:27:31,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 09:27:31,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 09:27:31,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 09:27:31,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:27:30" (1/3) ... [2022-11-20 09:27:31,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c30cba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:31, skipping insertion in model container [2022-11-20 09:27:31,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:27:30" (2/3) ... [2022-11-20 09:27:31,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c30cba2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:27:31, skipping insertion in model container [2022-11-20 09:27:31,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:27:31" (3/3) ... [2022-11-20 09:27:31,594 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound50.c [2022-11-20 09:27:31,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 09:27:31,616 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 09:27:31,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 09:27:31,690 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;@4ba89b72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 09:27:31,690 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 09:27:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 09:27:31,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 09:27:31,702 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:31,703 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:31,703 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1022199732, now seen corresponding path program 1 times [2022-11-20 09:27:31,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:31,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946811771] [2022-11-20 09:27:31,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:31,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:31,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:31,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946811771] [2022-11-20 09:27:31,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-20 09:27:31,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302112753] [2022-11-20 09:27:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:31,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:31,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:31,859 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:31,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 09:27:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:32,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 09:27:32,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 09:27:32,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:32,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302112753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:32,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:32,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 09:27:32,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612729063] [2022-11-20 09:27:32,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:32,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 09:27:32,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 09:27:32,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:32,123 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 09:27:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:32,166 INFO L93 Difference]: Finished difference Result 65 states and 104 transitions. [2022-11-20 09:27:32,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 09:27:32,168 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-11-20 09:27:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:32,177 INFO L225 Difference]: With dead ends: 65 [2022-11-20 09:27:32,178 INFO L226 Difference]: Without dead ends: 30 [2022-11-20 09:27:32,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 09:27:32,189 INFO L413 NwaCegarLoop]: 45 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, 45 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 [2022-11-20 09:27:32,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-20 09:27:32,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-20 09:27:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 09:27:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2022-11-20 09:27:32,239 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 28 [2022-11-20 09:27:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:32,240 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2022-11-20 09:27:32,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 09:27:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2022-11-20 09:27:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-20 09:27:32,244 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:32,245 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:32,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:32,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 09:27:32,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:32,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:32,454 INFO L85 PathProgramCache]: Analyzing trace with hash -455220980, now seen corresponding path program 1 times [2022-11-20 09:27:32,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:32,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977632033] [2022-11-20 09:27:32,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:32,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:32,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:32,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008570096] [2022-11-20 09:27:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:32,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:32,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:32,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:32,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 09:27:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:32,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 09:27:32,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 09:27:32,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:32,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:32,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977632033] [2022-11-20 09:27:32,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:32,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008570096] [2022-11-20 09:27:32,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008570096] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:32,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:32,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 09:27:32,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111559496] [2022-11-20 09:27:32,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:32,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 09:27:32,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:32,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 09:27:32,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:32,795 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 09:27:32,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:32,820 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-11-20 09:27:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 09:27:32,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-20 09:27:32,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:32,822 INFO L225 Difference]: With dead ends: 40 [2022-11-20 09:27:32,823 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 09:27:32,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 09:27:32,828 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:32,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:32,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 09:27:32,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-20 09:27:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 09:27:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-11-20 09:27:32,837 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2022-11-20 09:27:32,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:32,839 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-11-20 09:27:32,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 09:27:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-11-20 09:27:32,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 09:27:32,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:32,841 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:32,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:33,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:33,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:33,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:33,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1233535180, now seen corresponding path program 1 times [2022-11-20 09:27:33,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:33,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104394586] [2022-11-20 09:27:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:33,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:33,075 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:33,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056440201] [2022-11-20 09:27:33,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:33,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:33,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:33,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:33,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 09:27:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:33,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 09:27:33,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 09:27:33,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 09:27:33,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:33,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104394586] [2022-11-20 09:27:33,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:33,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056440201] [2022-11-20 09:27:33,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056440201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:33,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:27:33,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-11-20 09:27:33,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222804891] [2022-11-20 09:27:33,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:33,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:27:33,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:27:33,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:27:33,308 INFO L87 Difference]: Start difference. First operand 32 states and 43 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 09:27:33,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:33,417 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2022-11-20 09:27:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:27:33,418 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-11-20 09:27:33,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:33,419 INFO L225 Difference]: With dead ends: 49 [2022-11-20 09:27:33,419 INFO L226 Difference]: Without dead ends: 41 [2022-11-20 09:27:33,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:27:33,421 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:33,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 92 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-20 09:27:33,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-11-20 09:27:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 09:27:33,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2022-11-20 09:27:33,432 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 30 [2022-11-20 09:27:33,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:33,433 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2022-11-20 09:27:33,433 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 09:27:33,433 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2022-11-20 09:27:33,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 09:27:33,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:33,434 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:33,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:33,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:33,644 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:33,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:33,645 INFO L85 PathProgramCache]: Analyzing trace with hash -73118621, now seen corresponding path program 1 times [2022-11-20 09:27:33,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:33,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186063991] [2022-11-20 09:27:33,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:33,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:33,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:33,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731370687] [2022-11-20 09:27:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:33,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:33,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:33,662 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:33,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 09:27:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:33,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 09:27:33,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 09:27:33,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 09:27:33,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:33,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186063991] [2022-11-20 09:27:33,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:33,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731370687] [2022-11-20 09:27:33,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731370687] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:33,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:33,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-11-20 09:27:33,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078628416] [2022-11-20 09:27:33,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:33,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:27:33,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:33,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:27:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:27:33,926 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 09:27:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:34,018 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2022-11-20 09:27:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:27:34,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-11-20 09:27:34,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:34,023 INFO L225 Difference]: With dead ends: 39 [2022-11-20 09:27:34,025 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 09:27:34,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:27:34,033 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 114 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 [2022-11-20 09:27:34,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 114 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 09:27:34,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-20 09:27:34,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 09:27:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-11-20 09:27:34,051 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 32 [2022-11-20 09:27:34,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:34,057 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-11-20 09:27:34,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 09:27:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-11-20 09:27:34,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 09:27:34,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:34,061 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:34,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:34,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:34,266 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:34,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:34,267 INFO L85 PathProgramCache]: Analyzing trace with hash 96561445, now seen corresponding path program 1 times [2022-11-20 09:27:34,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:34,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617771537] [2022-11-20 09:27:34,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:34,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:34,281 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:34,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544055069] [2022-11-20 09:27:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:34,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:34,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:34,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:34,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 09:27:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:34,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:27:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:34,436 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 09:27:34,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:27:34,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:34,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617771537] [2022-11-20 09:27:34,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:34,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544055069] [2022-11-20 09:27:34,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544055069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:27:34,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:27:34,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 09:27:34,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776626086] [2022-11-20 09:27:34,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:34,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:27:34,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:34,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:27:34,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:27:34,439 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 09:27:34,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:34,474 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-11-20 09:27:34,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 09:27:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-20 09:27:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:34,479 INFO L225 Difference]: With dead ends: 62 [2022-11-20 09:27:34,479 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 09:27:34,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:27:34,480 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:34,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 100 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 09:27:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-20 09:27:34,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 09:27:34,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2022-11-20 09:27:34,498 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 35 [2022-11-20 09:27:34,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:34,500 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2022-11-20 09:27:34,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 09:27:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2022-11-20 09:27:34,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 09:27:34,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:34,501 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:34,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:34,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:34,718 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:34,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:34,719 INFO L85 PathProgramCache]: Analyzing trace with hash 433790877, now seen corresponding path program 1 times [2022-11-20 09:27:34,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:34,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344892427] [2022-11-20 09:27:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:34,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:34,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:34,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751416574] [2022-11-20 09:27:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:34,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:34,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:34,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:34,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 09:27:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-20 09:27:34,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:35,122 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 09:27:35,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 09:27:35,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:35,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344892427] [2022-11-20 09:27:35,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:35,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751416574] [2022-11-20 09:27:35,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751416574] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:35,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:35,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2022-11-20 09:27:35,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527140724] [2022-11-20 09:27:35,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:35,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:27:35,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:35,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:27:35,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:27:35,280 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 09:27:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:35,354 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2022-11-20 09:27:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:27:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2022-11-20 09:27:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:35,358 INFO L225 Difference]: With dead ends: 53 [2022-11-20 09:27:35,358 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 09:27:35,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-11-20 09:27:35,360 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:35,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 140 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:35,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 09:27:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-11-20 09:27:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-20 09:27:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-11-20 09:27:35,388 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 37 [2022-11-20 09:27:35,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:35,389 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-11-20 09:27:35,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 09:27:35,394 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-11-20 09:27:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 09:27:35,401 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:35,401 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 09:27:35,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:35,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:35,607 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash -553232285, now seen corresponding path program 1 times [2022-11-20 09:27:35,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:35,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500371073] [2022-11-20 09:27:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:35,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:35,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:35,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577750674] [2022-11-20 09:27:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:35,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:35,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:35,632 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:35,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 09:27:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 09:27:35,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-20 09:27:35,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 09:27:36,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:36,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500371073] [2022-11-20 09:27:36,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:36,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577750674] [2022-11-20 09:27:36,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577750674] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:36,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:36,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2022-11-20 09:27:36,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783316832] [2022-11-20 09:27:36,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:27:36,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:27:36,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:36,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:27:36,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-20 09:27:36,059 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 09:27:36,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:36,124 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2022-11-20 09:27:36,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:27:36,125 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-11-20 09:27:36,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:36,126 INFO L225 Difference]: With dead ends: 57 [2022-11-20 09:27:36,126 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 09:27:36,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:27:36,127 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:36,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 131 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 09:27:36,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 09:27:36,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-11-20 09:27:36,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 35 states have internal predecessors, (41), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-20 09:27:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2022-11-20 09:27:36,141 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 42 [2022-11-20 09:27:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:36,141 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2022-11-20 09:27:36,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-20 09:27:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2022-11-20 09:27:36,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 09:27:36,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:36,143 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2022-11-20 09:27:36,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:36,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:36,349 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2115683101, now seen corresponding path program 1 times [2022-11-20 09:27:36,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:36,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504115794] [2022-11-20 09:27:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:36,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:36,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:36,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553833042] [2022-11-20 09:27:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:36,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:36,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:36,363 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:36,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 09:27:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:36,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-20 09:27:36,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 09:27:36,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:37,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504115794] [2022-11-20 09:27:37,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553833042] [2022-11-20 09:27:37,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553833042] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:37,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:37,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-20 09:27:37,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724863465] [2022-11-20 09:27:37,300 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:37,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 09:27:37,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 09:27:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:37,301 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 09:27:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:37,474 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2022-11-20 09:27:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 09:27:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-20 09:27:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:37,475 INFO L225 Difference]: With dead ends: 61 [2022-11-20 09:27:37,475 INFO L226 Difference]: Without dead ends: 59 [2022-11-20 09:27:37,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:27:37,477 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:37,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:27:37,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-20 09:27:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-11-20 09:27:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 38 states have internal predecessors, (44), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-20 09:27:37,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-11-20 09:27:37,509 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 47 [2022-11-20 09:27:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:37,510 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-11-20 09:27:37,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 09:27:37,510 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-11-20 09:27:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-20 09:27:37,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:37,511 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:37,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:37,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:37,712 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:37,713 INFO L85 PathProgramCache]: Analyzing trace with hash -879665460, now seen corresponding path program 1 times [2022-11-20 09:27:37,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:37,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021536526] [2022-11-20 09:27:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:37,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:37,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12402611] [2022-11-20 09:27:37,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:37,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:37,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:37,727 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:37,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 09:27:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:37,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 09:27:37,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 09:27:37,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 09:27:38,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:38,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021536526] [2022-11-20 09:27:38,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:38,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12402611] [2022-11-20 09:27:38,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12402611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:38,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:27:38,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-20 09:27:38,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776375564] [2022-11-20 09:27:38,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:38,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:38,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:38,007 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-20 09:27:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:38,296 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2022-11-20 09:27:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 09:27:38,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 56 [2022-11-20 09:27:38,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:38,299 INFO L225 Difference]: With dead ends: 211 [2022-11-20 09:27:38,299 INFO L226 Difference]: Without dead ends: 203 [2022-11-20 09:27:38,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:27:38,301 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 113 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:38,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 180 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:27:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-11-20 09:27:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 195. [2022-11-20 09:27:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 125 states have (on average 1.192) internal successors, (149), 129 states have internal predecessors, (149), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-20 09:27:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2022-11-20 09:27:38,364 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 56 [2022-11-20 09:27:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:38,365 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2022-11-20 09:27:38,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-20 09:27:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2022-11-20 09:27:38,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-20 09:27:38,368 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:38,368 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:38,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:38,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 09:27:38,574 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:38,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:38,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1506412172, now seen corresponding path program 1 times [2022-11-20 09:27:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:38,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977572319] [2022-11-20 09:27:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:38,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:38,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:38,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856878909] [2022-11-20 09:27:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:38,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:38,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:38,586 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:38,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 09:27:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 09:27:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 09:27:38,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 09:27:38,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:38,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977572319] [2022-11-20 09:27:38,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:38,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856878909] [2022-11-20 09:27:38,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856878909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:38,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:27:38,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-20 09:27:38,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562086102] [2022-11-20 09:27:38,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:38,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 09:27:38,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 09:27:38,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-20 09:27:38,875 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 09:27:39,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:39,184 INFO L93 Difference]: Finished difference Result 279 states and 364 transitions. [2022-11-20 09:27:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:27:39,185 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 57 [2022-11-20 09:27:39,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:39,187 INFO L225 Difference]: With dead ends: 279 [2022-11-20 09:27:39,187 INFO L226 Difference]: Without dead ends: 259 [2022-11-20 09:27:39,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-11-20 09:27:39,189 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 70 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:39,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 286 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:27:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-20 09:27:39,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2022-11-20 09:27:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.2236842105263157) internal successors, (186), 155 states have internal predecessors, (186), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-11-20 09:27:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 299 transitions. [2022-11-20 09:27:39,269 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 299 transitions. Word has length 57 [2022-11-20 09:27:39,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:39,270 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 299 transitions. [2022-11-20 09:27:39,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 09:27:39,271 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 299 transitions. [2022-11-20 09:27:39,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-20 09:27:39,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:39,272 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:39,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:39,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 09:27:39,478 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:39,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:39,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1869160295, now seen corresponding path program 1 times [2022-11-20 09:27:39,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:39,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198139557] [2022-11-20 09:27:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:39,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:39,491 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:39,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605589770] [2022-11-20 09:27:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:39,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:39,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:39,493 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:39,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 09:27:39,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:39,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-20 09:27:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 09:27:39,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-20 09:27:39,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:39,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198139557] [2022-11-20 09:27:39,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:39,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605589770] [2022-11-20 09:27:39,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605589770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:39,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:27:39,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-20 09:27:39,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903122329] [2022-11-20 09:27:39,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:39,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 09:27:39,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:39,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 09:27:39,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 09:27:39,769 INFO L87 Difference]: Start difference. First operand 235 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-20 09:27:40,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:40,018 INFO L93 Difference]: Finished difference Result 344 states and 448 transitions. [2022-11-20 09:27:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 09:27:40,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 59 [2022-11-20 09:27:40,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:40,022 INFO L225 Difference]: With dead ends: 344 [2022-11-20 09:27:40,022 INFO L226 Difference]: Without dead ends: 248 [2022-11-20 09:27:40,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-20 09:27:40,026 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 75 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:40,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 252 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 09:27:40,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-20 09:27:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 244. [2022-11-20 09:27:40,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 161 states have (on average 1.173913043478261) internal successors, (189), 164 states have internal predecessors, (189), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2022-11-20 09:27:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 302 transitions. [2022-11-20 09:27:40,085 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 302 transitions. Word has length 59 [2022-11-20 09:27:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:40,086 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 302 transitions. [2022-11-20 09:27:40,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 10 states have internal predecessors, (41), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-20 09:27:40,087 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 302 transitions. [2022-11-20 09:27:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 09:27:40,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:40,088 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-11-20 09:27:40,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:40,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-20 09:27:40,294 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:40,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:40,295 INFO L85 PathProgramCache]: Analyzing trace with hash 991223133, now seen corresponding path program 1 times [2022-11-20 09:27:40,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:40,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937700368] [2022-11-20 09:27:40,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:40,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:40,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:40,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91014961] [2022-11-20 09:27:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:40,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:40,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:40,327 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:40,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 09:27:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:40,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-20 09:27:40,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 8 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-20 09:27:40,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-20 09:27:40,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:40,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937700368] [2022-11-20 09:27:40,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:40,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91014961] [2022-11-20 09:27:40,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91014961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:40,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:27:40,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2022-11-20 09:27:40,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237353450] [2022-11-20 09:27:40,821 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:40,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-20 09:27:40,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:40,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-20 09:27:40,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-20 09:27:40,823 INFO L87 Difference]: Start difference. First operand 244 states and 302 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-20 09:27:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:41,304 INFO L93 Difference]: Finished difference Result 330 states and 429 transitions. [2022-11-20 09:27:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 09:27:41,305 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2022-11-20 09:27:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:41,308 INFO L225 Difference]: With dead ends: 330 [2022-11-20 09:27:41,308 INFO L226 Difference]: Without dead ends: 324 [2022-11-20 09:27:41,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-11-20 09:27:41,309 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 33 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:41,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 279 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 09:27:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-20 09:27:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2022-11-20 09:27:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 203 states have internal predecessors, (232), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-11-20 09:27:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 366 transitions. [2022-11-20 09:27:41,379 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 366 transitions. Word has length 64 [2022-11-20 09:27:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:41,380 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 366 transitions. [2022-11-20 09:27:41,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-20 09:27:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 366 transitions. [2022-11-20 09:27:41,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 09:27:41,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:41,381 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2022-11-20 09:27:41,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:41,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 09:27:41,587 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:41,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:41,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1694315171, now seen corresponding path program 2 times [2022-11-20 09:27:41,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:41,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783066114] [2022-11-20 09:27:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:41,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:41,597 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:41,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912690124] [2022-11-20 09:27:41,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:27:41,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:41,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:41,599 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:41,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 09:27:41,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:27:41,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:27:41,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-20 09:27:41,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:42,371 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-20 09:27:42,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:44,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:44,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783066114] [2022-11-20 09:27:44,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:44,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912690124] [2022-11-20 09:27:44,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912690124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:44,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:44,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-20 09:27:44,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449753721] [2022-11-20 09:27:44,931 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:44,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 09:27:44,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:44,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 09:27:44,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=285, Unknown=1, NotChecked=0, Total=342 [2022-11-20 09:27:44,932 INFO L87 Difference]: Start difference. First operand 291 states and 366 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 09:27:45,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:45,581 INFO L93 Difference]: Finished difference Result 315 states and 393 transitions. [2022-11-20 09:27:45,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 09:27:45,582 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 69 [2022-11-20 09:27:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:45,584 INFO L225 Difference]: With dead ends: 315 [2022-11-20 09:27:45,584 INFO L226 Difference]: Without dead ends: 313 [2022-11-20 09:27:45,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=93, Invalid=458, Unknown=1, NotChecked=0, Total=552 [2022-11-20 09:27:45,586 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 92 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:45,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 199 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 09:27:45,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-11-20 09:27:45,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2022-11-20 09:27:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 206 states have (on average 1.1941747572815533) internal successors, (246), 215 states have internal predecessors, (246), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-20 09:27:45,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 388 transitions. [2022-11-20 09:27:45,663 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 388 transitions. Word has length 69 [2022-11-20 09:27:45,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:45,663 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 388 transitions. [2022-11-20 09:27:45,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-20 09:27:45,664 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 388 transitions. [2022-11-20 09:27:45,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-20 09:27:45,670 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:45,670 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:45,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:45,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:45,876 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1349365539, now seen corresponding path program 3 times [2022-11-20 09:27:45,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:45,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859378427] [2022-11-20 09:27:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:45,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:45,888 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:45,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519103365] [2022-11-20 09:27:45,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:27:45,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:45,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:45,900 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:45,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 09:27:45,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:27:45,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:27:45,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-20 09:27:45,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:46,585 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 40 proven. 10 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-20 09:27:46,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:48,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:48,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859378427] [2022-11-20 09:27:48,087 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:48,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519103365] [2022-11-20 09:27:48,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519103365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 09:27:48,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-20 09:27:48,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-20 09:27:48,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957816364] [2022-11-20 09:27:48,088 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:48,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 09:27:48,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:48,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 09:27:48,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:27:48,089 INFO L87 Difference]: Start difference. First operand 310 states and 388 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-20 09:27:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:27:48,812 INFO L93 Difference]: Finished difference Result 327 states and 404 transitions. [2022-11-20 09:27:48,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 09:27:48,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 74 [2022-11-20 09:27:48,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:27:48,814 INFO L225 Difference]: With dead ends: 327 [2022-11-20 09:27:48,815 INFO L226 Difference]: Without dead ends: 323 [2022-11-20 09:27:48,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:27:48,816 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 36 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 09:27:48,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 219 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 09:27:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-11-20 09:27:48,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 320. [2022-11-20 09:27:48,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 214 states have (on average 1.1822429906542056) internal successors, (253), 222 states have internal predecessors, (253), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2022-11-20 09:27:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 395 transitions. [2022-11-20 09:27:48,874 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 395 transitions. Word has length 74 [2022-11-20 09:27:48,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:27:48,875 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 395 transitions. [2022-11-20 09:27:48,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-11-20 09:27:48,875 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 395 transitions. [2022-11-20 09:27:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 09:27:48,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:27:48,876 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:27:48,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 09:27:49,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:49,082 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:27:49,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:27:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash -484140586, now seen corresponding path program 1 times [2022-11-20 09:27:49,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:27:49,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512101060] [2022-11-20 09:27:49,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:49,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:27:49,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:27:49,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888244591] [2022-11-20 09:27:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:27:49,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:27:49,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:27:49,094 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:27:49,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 09:27:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:27:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-20 09:27:49,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:27:49,924 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-20 09:27:49,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:27:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-20 09:27:51,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:27:51,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512101060] [2022-11-20 09:27:51,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:27:51,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888244591] [2022-11-20 09:27:51,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888244591] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:27:51,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:27:51,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2022-11-20 09:27:51,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781707789] [2022-11-20 09:27:51,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:27:51,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 09:27:51,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:27:51,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 09:27:51,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-11-20 09:27:51,003 INFO L87 Difference]: Start difference. First operand 320 states and 395 transitions. Second operand has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-20 09:28:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:07,278 INFO L93 Difference]: Finished difference Result 454 states and 601 transitions. [2022-11-20 09:28:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-20 09:28:07,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-11-20 09:28:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:07,281 INFO L225 Difference]: With dead ends: 454 [2022-11-20 09:28:07,281 INFO L226 Difference]: Without dead ends: 443 [2022-11-20 09:28:07,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 09:28:07,283 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 168 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:07,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 591 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-11-20 09:28:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-20 09:28:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 410. [2022-11-20 09:28:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 272 states have (on average 1.2316176470588236) internal successors, (335), 281 states have internal predecessors, (335), 103 states have call successors, (103), 34 states have call predecessors, (103), 34 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2022-11-20 09:28:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 539 transitions. [2022-11-20 09:28:07,428 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 539 transitions. Word has length 80 [2022-11-20 09:28:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:07,429 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 539 transitions. [2022-11-20 09:28:07,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 states have internal predecessors, (44), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-20 09:28:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 539 transitions. [2022-11-20 09:28:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 09:28:07,431 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:07,431 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 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] [2022-11-20 09:28:07,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:07,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 09:28:07,637 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:07,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:07,638 INFO L85 PathProgramCache]: Analyzing trace with hash 164622435, now seen corresponding path program 4 times [2022-11-20 09:28:07,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:07,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834171830] [2022-11-20 09:28:07,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:07,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:07,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:28:07,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066450111] [2022-11-20 09:28:07,648 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:28:07,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:07,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:07,650 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:07,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 09:28:07,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:28:07,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:28:07,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-20 09:28:07,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-20 09:28:07,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 09:28:07,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:07,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834171830] [2022-11-20 09:28:07,777 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:28:07,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066450111] [2022-11-20 09:28:07,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066450111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 09:28:07,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 09:28:07,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 09:28:07,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709220591] [2022-11-20 09:28:07,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 09:28:07,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 09:28:07,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:07,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 09:28:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 09:28:07,779 INFO L87 Difference]: Start difference. First operand 410 states and 539 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-20 09:28:08,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:28:08,065 INFO L93 Difference]: Finished difference Result 623 states and 882 transitions. [2022-11-20 09:28:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 09:28:08,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 96 [2022-11-20 09:28:08,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:28:08,069 INFO L225 Difference]: With dead ends: 623 [2022-11-20 09:28:08,069 INFO L226 Difference]: Without dead ends: 448 [2022-11-20 09:28:08,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 09:28:08,071 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 13 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 09:28:08,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 163 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 09:28:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-20 09:28:08,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 405. [2022-11-20 09:28:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 265 states have (on average 1.230188679245283) internal successors, (326), 271 states have internal predecessors, (326), 105 states have call successors, (105), 34 states have call predecessors, (105), 34 states have return successors, (103), 99 states have call predecessors, (103), 103 states have call successors, (103) [2022-11-20 09:28:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 534 transitions. [2022-11-20 09:28:08,198 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 534 transitions. Word has length 96 [2022-11-20 09:28:08,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:28:08,199 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 534 transitions. [2022-11-20 09:28:08,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-20 09:28:08,199 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 534 transitions. [2022-11-20 09:28:08,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-20 09:28:08,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:28:08,201 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:28:08,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 09:28:08,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 09:28:08,401 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:28:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:28:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1718599493, now seen corresponding path program 1 times [2022-11-20 09:28:08,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:28:08,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655734225] [2022-11-20 09:28:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:08,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:28:08,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:28:08,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863120239] [2022-11-20 09:28:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:28:08,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:28:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:28:08,434 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:28:08,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 09:28:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:28:08,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 09:28:08,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:28:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-11-20 09:28:09,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:28:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-11-20 09:28:11,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:28:11,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655734225] [2022-11-20 09:28:11,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:28:11,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863120239] [2022-11-20 09:28:11,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863120239] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:28:11,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:28:11,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2022-11-20 09:28:11,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245975712] [2022-11-20 09:28:11,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:28:11,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-20 09:28:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:28:11,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-20 09:28:11,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-20 09:28:11,480 INFO L87 Difference]: Start difference. First operand 405 states and 534 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-20 09:28:26,409 WARN L233 SmtUtils]: Spent 6.53s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:28:30,059 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 [] [2022-11-20 09:28:36,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:28:46,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:28:51,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:28:54,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:28:59,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:29:01,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:29:03,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:29:08,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:29:11,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:29:21,958 WARN L233 SmtUtils]: Spent 10.10s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:29:24,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:29:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:25,773 INFO L93 Difference]: Finished difference Result 553 states and 767 transitions. [2022-11-20 09:29:25,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 09:29:25,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 97 [2022-11-20 09:29:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:25,778 INFO L225 Difference]: With dead ends: 553 [2022-11-20 09:29:25,778 INFO L226 Difference]: Without dead ends: 551 [2022-11-20 09:29:25,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=452, Invalid=1709, Unknown=1, NotChecked=0, Total=2162 [2022-11-20 09:29:25,780 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 225 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 227 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.8s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:25,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 312 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1153 Invalid, 7 Unknown, 0 Unchecked, 33.8s Time] [2022-11-20 09:29:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-20 09:29:25,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 468. [2022-11-20 09:29:26,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 305 states have (on average 1.2524590163934426) internal successors, (382), 312 states have internal predecessors, (382), 127 states have call successors, (127), 35 states have call predecessors, (127), 35 states have return successors, (125), 120 states have call predecessors, (125), 125 states have call successors, (125) [2022-11-20 09:29:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 634 transitions. [2022-11-20 09:29:26,004 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 634 transitions. Word has length 97 [2022-11-20 09:29:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:26,004 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 634 transitions. [2022-11-20 09:29:26,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 19 states have internal predecessors, (53), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-20 09:29:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 634 transitions. [2022-11-20 09:29:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-20 09:29:26,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:26,007 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:26,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:26,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 09:29:26,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:26,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash -245423741, now seen corresponding path program 1 times [2022-11-20 09:29:26,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:26,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499028079] [2022-11-20 09:29:26,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:26,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:26,242 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:29:26,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769818828] [2022-11-20 09:29:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:26,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:26,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:26,256 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:26,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 09:29:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:29:26,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 09:29:26,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-20 09:29:26,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:26,790 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-20 09:29:26,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:26,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499028079] [2022-11-20 09:29:26,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:29:26,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769818828] [2022-11-20 09:29:26,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769818828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:26,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:26,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-11-20 09:29:26,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868959301] [2022-11-20 09:29:26,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:26,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:29:26,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:29:26,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:29:26,794 INFO L87 Difference]: Start difference. First operand 468 states and 634 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-20 09:29:28,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:29:28,105 INFO L93 Difference]: Finished difference Result 1595 states and 2213 transitions. [2022-11-20 09:29:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 09:29:28,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2022-11-20 09:29:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:29:28,118 INFO L225 Difference]: With dead ends: 1595 [2022-11-20 09:29:28,118 INFO L226 Difference]: Without dead ends: 1391 [2022-11-20 09:29:28,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:29:28,121 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 321 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:29:28,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 350 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:29:28,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2022-11-20 09:29:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1335. [2022-11-20 09:29:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 837 states have (on average 1.1971326164874552) internal successors, (1002), 856 states have internal predecessors, (1002), 382 states have call successors, (382), 115 states have call predecessors, (382), 115 states have return successors, (373), 363 states have call predecessors, (373), 373 states have call successors, (373) [2022-11-20 09:29:28,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 1757 transitions. [2022-11-20 09:29:28,814 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 1757 transitions. Word has length 112 [2022-11-20 09:29:28,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:29:28,814 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 1757 transitions. [2022-11-20 09:29:28,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-20 09:29:28,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 1757 transitions. [2022-11-20 09:29:28,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 09:29:28,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:29:28,817 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:29:28,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 09:29:29,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 09:29:29,024 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:29:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:29:29,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1897577373, now seen corresponding path program 2 times [2022-11-20 09:29:29,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:29:29,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453409400] [2022-11-20 09:29:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:29:29,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:29:29,037 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:29:29,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647910170] [2022-11-20 09:29:29,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:29:29,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:29:29,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:29:29,041 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:29:29,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 09:29:29,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:29:29,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:29:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 09:29:29,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:29:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-11-20 09:29:30,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:29:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2022-11-20 09:29:32,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:29:32,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453409400] [2022-11-20 09:29:32,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:29:32,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647910170] [2022-11-20 09:29:32,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647910170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:29:32,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:29:32,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2022-11-20 09:29:32,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81141918] [2022-11-20 09:29:32,784 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:29:32,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 09:29:32,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:29:32,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 09:29:32,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-11-20 09:29:32,786 INFO L87 Difference]: Start difference. First operand 1335 states and 1757 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2022-11-20 09:30:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:11,619 INFO L93 Difference]: Finished difference Result 1848 states and 2525 transitions. [2022-11-20 09:30:11,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 09:30:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) Word has length 115 [2022-11-20 09:30:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:11,631 INFO L225 Difference]: With dead ends: 1848 [2022-11-20 09:30:11,631 INFO L226 Difference]: Without dead ends: 1846 [2022-11-20 09:30:11,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=651, Invalid=2541, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 09:30:11,634 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 265 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:11,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 769 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1291 Invalid, 0 Unknown, 0 Unchecked, 15.3s Time] [2022-11-20 09:30:11,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2022-11-20 09:30:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1748. [2022-11-20 09:30:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1077 states have (on average 1.2172701949860725) internal successors, (1311), 1096 states have internal predecessors, (1311), 538 states have call successors, (538), 132 states have call predecessors, (538), 132 states have return successors, (529), 519 states have call predecessors, (529), 529 states have call successors, (529) [2022-11-20 09:30:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 2378 transitions. [2022-11-20 09:30:12,941 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 2378 transitions. Word has length 115 [2022-11-20 09:30:12,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:12,942 INFO L495 AbstractCegarLoop]: Abstraction has 1748 states and 2378 transitions. [2022-11-20 09:30:12,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2022-11-20 09:30:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 2378 transitions. [2022-11-20 09:30:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-20 09:30:12,945 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:12,945 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:12,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:13,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:13,151 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:13,151 INFO L85 PathProgramCache]: Analyzing trace with hash 364386885, now seen corresponding path program 3 times [2022-11-20 09:30:13,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:13,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484553666] [2022-11-20 09:30:13,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:13,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:13,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:30:13,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340747766] [2022-11-20 09:30:13,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 09:30:13,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:13,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:13,174 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:13,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 09:30:13,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-20 09:30:13,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:13,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 09:30:13,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 75 proven. 47 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-11-20 09:30:14,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:16,429 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 70 proven. 43 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2022-11-20 09:30:16,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484553666] [2022-11-20 09:30:16,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:30:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340747766] [2022-11-20 09:30:16,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340747766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:16,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:16,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2022-11-20 09:30:16,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392785996] [2022-11-20 09:30:16,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:16,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 09:30:16,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 09:30:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:30:16,436 INFO L87 Difference]: Start difference. First operand 1748 states and 2378 transitions. Second operand has 28 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-20 09:30:23,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:30:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:32,299 INFO L93 Difference]: Finished difference Result 2217 states and 3006 transitions. [2022-11-20 09:30:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 09:30:32,300 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) Word has length 119 [2022-11-20 09:30:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:32,312 INFO L225 Difference]: With dead ends: 2217 [2022-11-20 09:30:32,312 INFO L226 Difference]: Without dead ends: 2213 [2022-11-20 09:30:32,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=642, Invalid=2550, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 09:30:32,316 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 275 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:32,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 418 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-11-20 09:30:32,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2022-11-20 09:30:34,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 2064. [2022-11-20 09:30:34,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 1289 states have (on average 1.2203258339798293) internal successors, (1573), 1312 states have internal predecessors, (1573), 610 states have call successors, (610), 165 states have call predecessors, (610), 164 states have return successors, (601), 586 states have call predecessors, (601), 601 states have call successors, (601) [2022-11-20 09:30:34,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 2784 transitions. [2022-11-20 09:30:34,214 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 2784 transitions. Word has length 119 [2022-11-20 09:30:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:34,214 INFO L495 AbstractCegarLoop]: Abstraction has 2064 states and 2784 transitions. [2022-11-20 09:30:34,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2022-11-20 09:30:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 2784 transitions. [2022-11-20 09:30:34,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-20 09:30:34,218 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:34,218 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:34,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:34,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:34,424 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1036292276, now seen corresponding path program 1 times [2022-11-20 09:30:34,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:34,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891737559] [2022-11-20 09:30:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:34,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:34,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:30:34,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978860183] [2022-11-20 09:30:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:34,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:34,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:34,440 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:34,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 09:30:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 09:30:34,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 09:30:34,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-20 09:30:34,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-11-20 09:30:35,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:35,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891737559] [2022-11-20 09:30:35,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:30:35,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978860183] [2022-11-20 09:30:35,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978860183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:35,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:35,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-11-20 09:30:35,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755674393] [2022-11-20 09:30:35,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:35,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-20 09:30:35,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:35,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-20 09:30:35,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-11-20 09:30:35,006 INFO L87 Difference]: Start difference. First operand 2064 states and 2784 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-11-20 09:30:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:30:37,161 INFO L93 Difference]: Finished difference Result 2142 states and 2862 transitions. [2022-11-20 09:30:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 09:30:37,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 129 [2022-11-20 09:30:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:30:37,172 INFO L225 Difference]: With dead ends: 2142 [2022-11-20 09:30:37,172 INFO L226 Difference]: Without dead ends: 2102 [2022-11-20 09:30:37,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2022-11-20 09:30:37,176 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 371 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 09:30:37,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 333 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 09:30:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2102 states. [2022-11-20 09:30:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2102 to 2088. [2022-11-20 09:30:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 1313 states have (on average 1.1858339680121859) internal successors, (1557), 1336 states have internal predecessors, (1557), 610 states have call successors, (610), 165 states have call predecessors, (610), 164 states have return successors, (601), 586 states have call predecessors, (601), 601 states have call successors, (601) [2022-11-20 09:30:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 2768 transitions. [2022-11-20 09:30:38,755 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 2768 transitions. Word has length 129 [2022-11-20 09:30:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:30:38,756 INFO L495 AbstractCegarLoop]: Abstraction has 2088 states and 2768 transitions. [2022-11-20 09:30:38,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2022-11-20 09:30:38,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 2768 transitions. [2022-11-20 09:30:38,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-20 09:30:38,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:30:38,759 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:30:38,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 09:30:38,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 09:30:38,966 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:30:38,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:30:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2066876172, now seen corresponding path program 2 times [2022-11-20 09:30:38,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:30:38,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141712441] [2022-11-20 09:30:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:30:38,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:30:38,990 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:30:38,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329752905] [2022-11-20 09:30:38,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 09:30:38,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:30:38,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:30:38,992 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:30:38,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 09:30:39,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 09:30:39,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:30:39,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-20 09:30:39,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:30:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 35 proven. 58 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-11-20 09:30:40,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:30:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-11-20 09:30:47,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:30:47,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141712441] [2022-11-20 09:30:47,853 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:30:47,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329752905] [2022-11-20 09:30:47,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329752905] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:30:47,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:30:47,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2022-11-20 09:30:47,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234269654] [2022-11-20 09:30:47,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:30:47,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 09:30:47,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:30:47,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 09:30:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-11-20 09:30:47,856 INFO L87 Difference]: Start difference. First operand 2088 states and 2768 transitions. Second operand has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2022-11-20 09:31:25,605 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 [] [2022-11-20 09:31:32,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:31:40,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:31:42,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:32:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 09:32:26,076 INFO L93 Difference]: Finished difference Result 2546 states and 3428 transitions. [2022-11-20 09:32:26,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-20 09:32:26,077 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) Word has length 130 [2022-11-20 09:32:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 09:32:26,089 INFO L225 Difference]: With dead ends: 2546 [2022-11-20 09:32:26,089 INFO L226 Difference]: Without dead ends: 2511 [2022-11-20 09:32:26,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=1270, Invalid=5702, Unknown=0, NotChecked=0, Total=6972 [2022-11-20 09:32:26,094 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 395 mSDsluCounter, 960 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 562 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 2679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.9s IncrementalHoareTripleChecker+Time [2022-11-20 09:32:26,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 1121 Invalid, 2679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 2116 Invalid, 1 Unknown, 0 Unchecked, 45.9s Time] [2022-11-20 09:32:26,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2022-11-20 09:32:28,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2306. [2022-11-20 09:32:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2306 states, 1446 states have (on average 1.190179806362379) internal successors, (1721), 1468 states have internal predecessors, (1721), 678 states have call successors, (678), 182 states have call predecessors, (678), 181 states have return successors, (669), 655 states have call predecessors, (669), 669 states have call successors, (669) [2022-11-20 09:32:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2306 states to 2306 states and 3068 transitions. [2022-11-20 09:32:28,118 INFO L78 Accepts]: Start accepts. Automaton has 2306 states and 3068 transitions. Word has length 130 [2022-11-20 09:32:28,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 09:32:28,119 INFO L495 AbstractCegarLoop]: Abstraction has 2306 states and 3068 transitions. [2022-11-20 09:32:28,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2022-11-20 09:32:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2306 states and 3068 transitions. [2022-11-20 09:32:28,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-20 09:32:28,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 09:32:28,123 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 09:32:28,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 09:32:28,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:28,330 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 09:32:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 09:32:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1962327715, now seen corresponding path program 4 times [2022-11-20 09:32:28,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 09:32:28,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793064763] [2022-11-20 09:32:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 09:32:28,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 09:32:28,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-20 09:32:28,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [552833784] [2022-11-20 09:32:28,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 09:32:28,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 09:32:28,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 09:32:28,346 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 09:32:28,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a38f4a1-e6c0-4817-b6b9-6f2400f9c1d4/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 09:32:28,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 09:32:28,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 09:32:28,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 84 conjunts are in the unsatisfiable core [2022-11-20 09:32:28,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 09:32:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 167 proven. 100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-11-20 09:32:31,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 09:33:14,134 WARN L233 SmtUtils]: Spent 8.84s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 09:33:16,317 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse3 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1| |c_ULTIMATE.start_main_~k~0#1|)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~k~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.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|))) (let ((.cse4 (* 2 .cse0)) (.cse5 (* 2 .cse1)) (.cse6 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~s~0#1|)) (.cse7 (* |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~q~0#1|)) (.cse8 (* 2 .cse2)) (.cse9 (* 2 .cse3)) (.cse13 (* |c_ULTIMATE.start_main_~yy~0#1| |c_ULTIMATE.start_main_~r~0#1|)) (.cse12 (* |c_ULTIMATE.start_main_~xy~0#1| |c_ULTIMATE.start_main_~p~0#1|)) (.cse10 (* |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|))) (or (not (= (+ .cse0 .cse1) (+ |c_ULTIMATE.start_main_~c~0#1| .cse2 .cse3))) (<= (+ |c_ULTIMATE.start_main_~c~0#1| .cse4 .cse5) (+ .cse6 .cse7 .cse8 .cse9)) (= (+ (* .cse10 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|) (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~r~0#1|) 2) (* (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1| |c_ULTIMATE.start_main_~p~0#1|) 2)) (+ (* 2 (* |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|)) (* 2 (* |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|)) (* 2 .cse12) (* |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 .cse13))) (not (= (+ |c_ULTIMATE.start_main_~b~0#1| .cse4 .cse5) (+ (* |c_ULTIMATE.start_main_~c~0#1| 2) .cse6 .cse7 .cse8 .cse9))) (not (= (+ |c_ULTIMATE.start_main_~c~0#1| .cse13 .cse12 .cse2 .cse3) (+ .cse10 (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) .cse0 .cse11 .cse1)))))) is different from true [2022-11-20 09:34:23,807 WARN L233 SmtUtils]: Spent 6.36s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:35:14,097 WARN L233 SmtUtils]: Spent 5.28s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-20 09:35:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 170 proven. 53 refuted. 34 times theorem prover too weak. 564 trivial. 1 not checked. [2022-11-20 09:35:41,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 09:35:41,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793064763] [2022-11-20 09:35:41,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-20 09:35:41,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552833784] [2022-11-20 09:35:41,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552833784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 09:35:41,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 09:35:41,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 32 [2022-11-20 09:35:41,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18937740] [2022-11-20 09:35:41,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 09:35:41,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 09:35:41,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 09:35:41,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 09:35:41,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=731, Unknown=20, NotChecked=58, Total=992 [2022-11-20 09:35:41,280 INFO L87 Difference]: Start difference. First operand 2306 states and 3068 transitions. Second operand has 32 states, 30 states have (on average 2.433333333333333) internal successors, (73), 27 states have internal predecessors, (73), 16 states have call successors, (47), 3 states have call predecessors, (47), 3 states have return successors, (46), 17 states have call predecessors, (46), 15 states have call successors, (46) [2022-11-20 09:35:43,394 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 [] [2022-11-20 09:35:45,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:35:49,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:35:52,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:35:54,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:35:55,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:35:58,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:36:00,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:36:03,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:25,245 WARN L233 SmtUtils]: Spent 1.32m on a formula simplification. DAG size of input: 114 DAG size of output: 87 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:37:32,291 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 103 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:37:34,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:38,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:40,465 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:42,610 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:44,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:46,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:52,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:54,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:57,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:37:59,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:38:15,627 WARN L233 SmtUtils]: Spent 12.56s 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) [2022-11-20 09:39:37,313 WARN L233 SmtUtils]: Spent 1.35m on a formula simplification. DAG size of input: 113 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:39:42,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:39:44,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:39:50,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:39:52,367 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:39:54,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:39:56,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:40:00,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:40:02,016 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:40:04,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:41:51,193 WARN L233 SmtUtils]: Spent 1.75m on a formula simplification. DAG size of input: 101 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 09:41:53,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:41:55,370 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:42:01,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-20 09:42:44,613 WARN L233 SmtUtils]: Spent 38.58s on a formula simplification. DAG size of input: 92 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)