./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0aa7acffaab6ce009779fe302fdde8394c8a6410715baf98b336e98960ea357f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 18:30:55,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 18:30:55,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 18:30:55,814 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 18:30:55,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 18:30:55,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 18:30:55,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 18:30:55,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 18:30:55,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 18:30:55,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 18:30:55,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 18:30:55,842 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 18:30:55,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 18:30:55,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 18:30:55,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 18:30:55,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 18:30:55,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 18:30:55,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 18:30:55,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 18:30:55,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 18:30:55,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 18:30:55,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 18:30:55,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 18:30:55,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 18:30:55,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 18:30:55,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 18:30:55,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 18:30:55,877 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 18:30:55,878 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 18:30:55,879 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 18:30:55,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 18:30:55,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 18:30:55,883 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 18:30:55,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 18:30:55,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 18:30:55,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 18:30:55,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 18:30:55,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 18:30:55,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 18:30:55,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 18:30:55,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 18:30:55,889 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-18 18:30:55,925 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 18:30:55,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 18:30:55,930 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 18:30:55,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 18:30:55,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 18:30:55,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 18:30:55,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 18:30:55,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 18:30:55,933 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 18:30:55,933 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 18:30:55,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 18:30:55,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 18:30:55,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 18:30:55,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 18:30:55,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 18:30:55,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 18:30:55,935 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 18:30:55,935 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 18:30:55,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 18:30:55,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 18:30:55,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 18:30:55,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:30:55,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 18:30:55,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 18:30:55,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 18:30:55,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 18:30:55,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 18:30:55,939 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 18:30:55,939 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 18:30:55,939 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 18:30:55,940 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_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0aa7acffaab6ce009779fe302fdde8394c8a6410715baf98b336e98960ea357f [2022-11-18 18:30:56,246 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 18:30:56,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 18:30:56,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 18:30:56,277 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 18:30:56,278 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 18:30:56,280 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop1-back-serstep.c [2022-11-18 18:30:56,358 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/data/94e8a4931/b699df13ff354f609db55ce5984837b8/FLAGce79babfb [2022-11-18 18:30:57,329 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 18:30:57,329 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop1-back-serstep.c [2022-11-18 18:30:57,390 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/data/94e8a4931/b699df13ff354f609db55ce5984837b8/FLAGce79babfb [2022-11-18 18:30:57,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/data/94e8a4931/b699df13ff354f609db55ce5984837b8 [2022-11-18 18:30:57,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 18:30:57,736 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 18:30:57,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 18:30:57,737 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 18:30:57,747 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 18:30:57,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:30:57" (1/1) ... [2022-11-18 18:30:57,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf6e418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:30:57, skipping insertion in model container [2022-11-18 18:30:57,749 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 06:30:57" (1/1) ... [2022-11-18 18:30:57,756 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 18:30:57,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 18:30:58,422 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop1-back-serstep.c[1014,1027] [2022-11-18 18:30:59,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:30:59,982 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 18:30:59,994 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.pgm_protocol.3.prop1-back-serstep.c[1014,1027] [2022-11-18 18:31:00,954 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 18:31:00,982 INFO L208 MainTranslator]: Completed translation [2022-11-18 18:31:00,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00 WrapperNode [2022-11-18 18:31:00,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 18:31:00,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 18:31:00,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 18:31:00,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 18:31:00,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:01,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:02,487 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26754 [2022-11-18 18:31:02,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 18:31:02,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 18:31:02,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 18:31:02,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 18:31:02,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:02,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:02,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:02,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:03,287 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:03,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:03,458 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:03,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:03,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 18:31:03,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 18:31:03,779 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 18:31:03,779 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 18:31:03,780 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (1/1) ... [2022-11-18 18:31:03,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 18:31:03,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:31:03,836 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 18:31:03,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 18:31:03,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 18:31:03,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 18:31:06,283 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 18:31:06,285 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 18:31:47,818 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 18:31:47,864 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 18:31:47,865 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 18:31:47,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:31:47 BoogieIcfgContainer [2022-11-18 18:31:47,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 18:31:47,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 18:31:47,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 18:31:47,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 18:31:47,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 06:30:57" (1/3) ... [2022-11-18 18:31:47,890 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0dd1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:31:47, skipping insertion in model container [2022-11-18 18:31:47,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 06:31:00" (2/3) ... [2022-11-18 18:31:47,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c0dd1d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 06:31:47, skipping insertion in model container [2022-11-18 18:31:47,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 06:31:47" (3/3) ... [2022-11-18 18:31:47,893 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.pgm_protocol.3.prop1-back-serstep.c [2022-11-18 18:31:47,914 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 18:31:47,914 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 18:31:48,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 18:31:48,075 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;@73d67056, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 18:31:48,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 18:31:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 4709 states, 4707 states have (on average 1.6662417675801997) internal successors, (7843), 4708 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:48,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2022-11-18 18:31:48,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:31:48,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:48,138 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:31:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:48,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1839459210, now seen corresponding path program 1 times [2022-11-18 18:31:48,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:48,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578311248] [2022-11-18 18:31:48,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:48,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:49,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:31:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:31:52,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:31:52,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578311248] [2022-11-18 18:31:52,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578311248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:31:52,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:31:52,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:31:52,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2863127] [2022-11-18 18:31:52,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:31:52,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:31:52,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:31:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:31:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:31:52,654 INFO L87 Difference]: Start difference. First operand has 4709 states, 4707 states have (on average 1.6662417675801997) internal successors, (7843), 4708 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:54,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:31:57,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:31:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:31:57,522 INFO L93 Difference]: Finished difference Result 14956 states and 24922 transitions. [2022-11-18 18:31:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:31:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 567 [2022-11-18 18:31:57,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:31:57,601 INFO L225 Difference]: With dead ends: 14956 [2022-11-18 18:31:57,602 INFO L226 Difference]: Without dead ends: 10249 [2022-11-18 18:31:57,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:31:57,620 INFO L413 NwaCegarLoop]: 9240 mSDtfsCounter, 23487 mSDsluCounter, 10638 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23487 SdHoareTripleChecker+Valid, 19878 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:31:57,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23487 Valid, 19878 Invalid, 18 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 2 Unknown, 0 Unchecked, 4.3s Time] [2022-11-18 18:31:57,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10249 states. [2022-11-18 18:31:57,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10249 to 4707. [2022-11-18 18:31:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4707 states, 4706 states have (on average 1.6657458563535912) internal successors, (7839), 4706 states have internal predecessors, (7839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:57,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4707 states to 4707 states and 7839 transitions. [2022-11-18 18:31:57,847 INFO L78 Accepts]: Start accepts. Automaton has 4707 states and 7839 transitions. Word has length 567 [2022-11-18 18:31:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:31:57,849 INFO L495 AbstractCegarLoop]: Abstraction has 4707 states and 7839 transitions. [2022-11-18 18:31:57,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.75) internal successors, (567), 4 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:31:57,850 INFO L276 IsEmpty]: Start isEmpty. Operand 4707 states and 7839 transitions. [2022-11-18 18:31:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2022-11-18 18:31:57,865 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:31:57,866 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:31:57,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 18:31:57,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:31:57,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:31:57,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1190388982, now seen corresponding path program 1 times [2022-11-18 18:31:57,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:31:57,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385804197] [2022-11-18 18:31:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:31:57,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:31:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:07,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:07,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385804197] [2022-11-18 18:32:07,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385804197] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:07,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:07,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 18:32:07,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904366173] [2022-11-18 18:32:07,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:07,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 18:32:07,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:07,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 18:32:07,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:32:07,532 INFO L87 Difference]: Start difference. First operand 4707 states and 7839 transitions. Second operand has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:09,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:32:11,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:32:14,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:32:16,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:32:18,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:32:20,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:32:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:20,951 INFO L93 Difference]: Finished difference Result 14951 states and 24906 transitions. [2022-11-18 18:32:20,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 18:32:20,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 568 [2022-11-18 18:32:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:21,012 INFO L225 Difference]: With dead ends: 14951 [2022-11-18 18:32:21,013 INFO L226 Difference]: Without dead ends: 10246 [2022-11-18 18:32:21,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 18:32:21,022 INFO L413 NwaCegarLoop]: 9235 mSDtfsCounter, 8668 mSDsluCounter, 15661 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8668 SdHoareTripleChecker+Valid, 24896 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:21,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8668 Valid, 24896 Invalid, 19 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 6 Unknown, 0 Unchecked, 13.1s Time] [2022-11-18 18:32:21,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10246 states. [2022-11-18 18:32:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10246 to 5549. [2022-11-18 18:32:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 1.6656452775775055) internal successors, (9241), 5548 states have internal predecessors, (9241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 9241 transitions. [2022-11-18 18:32:21,392 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 9241 transitions. Word has length 568 [2022-11-18 18:32:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:21,393 INFO L495 AbstractCegarLoop]: Abstraction has 5549 states and 9241 transitions. [2022-11-18 18:32:21,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 9241 transitions. [2022-11-18 18:32:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3704 [2022-11-18 18:32:21,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:21,590 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:21,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 18:32:21,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:21,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:21,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1724893546, now seen corresponding path program 1 times [2022-11-18 18:32:21,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:21,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146540010] [2022-11-18 18:32:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:21,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:23,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:32:23,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581455167] [2022-11-18 18:32:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:23,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:23,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:23,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:23,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 18:32:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:36,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 33322 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:32:36,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:32:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:32:41,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:32:41,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:32:41,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146540010] [2022-11-18 18:32:41,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:32:41,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581455167] [2022-11-18 18:32:41,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581455167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:32:41,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:32:41,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:32:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781284657] [2022-11-18 18:32:41,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:32:41,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:32:41,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:32:41,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:32:41,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:32:41,069 INFO L87 Difference]: Start difference. First operand 5549 states and 9241 transitions. Second operand has 5 states, 5 states have (on average 740.6) internal successors, (3703), 5 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:43,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:32:43,318 INFO L93 Difference]: Finished difference Result 14957 states and 24911 transitions. [2022-11-18 18:32:43,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:32:43,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 740.6) internal successors, (3703), 5 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3703 [2022-11-18 18:32:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:32:43,352 INFO L225 Difference]: With dead ends: 14957 [2022-11-18 18:32:43,352 INFO L226 Difference]: Without dead ends: 10252 [2022-11-18 18:32:43,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3703 GetRequests, 3699 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:32:43,364 INFO L413 NwaCegarLoop]: 8881 mSDtfsCounter, 21439 mSDsluCounter, 16313 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21439 SdHoareTripleChecker+Valid, 25194 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:32:43,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21439 Valid, 25194 Invalid, 1248 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 18:32:43,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10252 states. [2022-11-18 18:32:43,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10252 to 5552. [2022-11-18 18:32:43,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5551 states have (on average 1.665285534137993) internal successors, (9244), 5551 states have internal predecessors, (9244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 9244 transitions. [2022-11-18 18:32:43,519 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 9244 transitions. Word has length 3703 [2022-11-18 18:32:43,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:32:43,521 INFO L495 AbstractCegarLoop]: Abstraction has 5552 states and 9244 transitions. [2022-11-18 18:32:43,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 740.6) internal successors, (3703), 5 states have internal predecessors, (3703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:32:43,524 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 9244 transitions. [2022-11-18 18:32:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3705 [2022-11-18 18:32:43,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:32:43,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:32:44,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 18:32:44,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:44,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:32:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:32:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1940998074, now seen corresponding path program 1 times [2022-11-18 18:32:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:32:44,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456090721] [2022-11-18 18:32:44,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:44,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:32:45,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:32:45,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395302791] [2022-11-18 18:32:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:32:45,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:32:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:32:45,353 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:32:45,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 18:32:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:32:59,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 33325 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 18:32:59,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:03,305 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:03,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:03,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:03,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456090721] [2022-11-18 18:33:03,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:33:03,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395302791] [2022-11-18 18:33:03,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395302791] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:03,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:03,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:33:03,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403945524] [2022-11-18 18:33:03,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:03,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:33:03,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:33:03,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:33:03,317 INFO L87 Difference]: Start difference. First operand 5552 states and 9244 transitions. Second operand has 6 states, 6 states have (on average 617.3333333333334) internal successors, (3704), 6 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:06,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:06,694 INFO L93 Difference]: Finished difference Result 19673 states and 32757 transitions. [2022-11-18 18:33:06,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:33:06,695 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 617.3333333333334) internal successors, (3704), 6 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3704 [2022-11-18 18:33:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:06,722 INFO L225 Difference]: With dead ends: 19673 [2022-11-18 18:33:06,723 INFO L226 Difference]: Without dead ends: 14965 [2022-11-18 18:33:06,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3705 GetRequests, 3699 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:33:06,729 INFO L413 NwaCegarLoop]: 9570 mSDtfsCounter, 38185 mSDsluCounter, 17008 mSDsCounter, 0 mSdLazyCounter, 1774 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38185 SdHoareTripleChecker+Valid, 26578 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:06,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38185 Valid, 26578 Invalid, 1776 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1774 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-18 18:33:06,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14965 states. [2022-11-18 18:33:06,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14965 to 5554. [2022-11-18 18:33:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5554 states, 5553 states have (on average 1.665045921123717) internal successors, (9246), 5553 states have internal predecessors, (9246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:06,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5554 states to 5554 states and 9246 transitions. [2022-11-18 18:33:06,885 INFO L78 Accepts]: Start accepts. Automaton has 5554 states and 9246 transitions. Word has length 3704 [2022-11-18 18:33:06,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:06,887 INFO L495 AbstractCegarLoop]: Abstraction has 5554 states and 9246 transitions. [2022-11-18 18:33:06,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 617.3333333333334) internal successors, (3704), 6 states have internal predecessors, (3704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5554 states and 9246 transitions. [2022-11-18 18:33:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3706 [2022-11-18 18:33:07,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:07,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:07,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 18:33:07,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:07,233 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:07,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:07,234 INFO L85 PathProgramCache]: Analyzing trace with hash 697428984, now seen corresponding path program 1 times [2022-11-18 18:33:07,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:07,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453402882] [2022-11-18 18:33:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:07,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:08,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:33:08,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383325949] [2022-11-18 18:33:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:08,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:08,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:08,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:08,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 18:33:23,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:23,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 33328 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:33:23,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:29,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:29,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:29,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453402882] [2022-11-18 18:33:29,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:33:29,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383325949] [2022-11-18 18:33:29,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383325949] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:29,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:29,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:33:29,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533060900] [2022-11-18 18:33:29,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:29,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:33:29,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:29,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:33:29,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:33:29,151 INFO L87 Difference]: Start difference. First operand 5554 states and 9246 transitions. Second operand has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:31,768 INFO L93 Difference]: Finished difference Result 14968 states and 24921 transitions. [2022-11-18 18:33:31,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:33:31,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3705 [2022-11-18 18:33:31,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:31,788 INFO L225 Difference]: With dead ends: 14968 [2022-11-18 18:33:31,788 INFO L226 Difference]: Without dead ends: 10258 [2022-11-18 18:33:31,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3705 GetRequests, 3701 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:33:31,794 INFO L413 NwaCegarLoop]: 9574 mSDtfsCounter, 14693 mSDsluCounter, 17008 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14693 SdHoareTripleChecker+Valid, 26582 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:31,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14693 Valid, 26582 Invalid, 1760 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 1760 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-18 18:33:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10258 states. [2022-11-18 18:33:31,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10258 to 5555. [2022-11-18 18:33:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5555 states, 5554 states have (on average 1.6649261793302124) internal successors, (9247), 5554 states have internal predecessors, (9247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5555 states to 5555 states and 9247 transitions. [2022-11-18 18:33:31,924 INFO L78 Accepts]: Start accepts. Automaton has 5555 states and 9247 transitions. Word has length 3705 [2022-11-18 18:33:31,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:31,926 INFO L495 AbstractCegarLoop]: Abstraction has 5555 states and 9247 transitions. [2022-11-18 18:33:31,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 741.0) internal successors, (3705), 5 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 5555 states and 9247 transitions. [2022-11-18 18:33:32,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3706 [2022-11-18 18:33:32,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:32,053 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:32,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 18:33:32,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:32,279 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:32,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:32,280 INFO L85 PathProgramCache]: Analyzing trace with hash 72676918, now seen corresponding path program 1 times [2022-11-18 18:33:32,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:32,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671739865] [2022-11-18 18:33:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:32,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:33,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:33:33,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402958649] [2022-11-18 18:33:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:33,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:33,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:33,963 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:33,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 18:33:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:33:48,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 33328 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:33:48,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:33:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:33:50,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:33:50,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:33:50,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671739865] [2022-11-18 18:33:50,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:33:50,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402958649] [2022-11-18 18:33:50,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402958649] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:33:50,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:33:50,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:33:50,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872290000] [2022-11-18 18:33:50,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:33:50,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:33:50,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:33:50,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:33:50,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:33:50,733 INFO L87 Difference]: Start difference. First operand 5555 states and 9247 transitions. Second operand has 7 states, 7 states have (on average 529.2857142857143) internal successors, (3705), 7 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:33:54,634 INFO L93 Difference]: Finished difference Result 24383 states and 40593 transitions. [2022-11-18 18:33:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:33:54,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 529.2857142857143) internal successors, (3705), 7 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3705 [2022-11-18 18:33:54,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:33:54,673 INFO L225 Difference]: With dead ends: 24383 [2022-11-18 18:33:54,673 INFO L226 Difference]: Without dead ends: 19672 [2022-11-18 18:33:54,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3707 GetRequests, 3699 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:33:54,685 INFO L413 NwaCegarLoop]: 15171 mSDtfsCounter, 61836 mSDsluCounter, 30090 mSDsCounter, 0 mSdLazyCounter, 1808 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61836 SdHoareTripleChecker+Valid, 45261 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:33:54,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61836 Valid, 45261 Invalid, 1810 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1808 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-18 18:33:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19672 states. [2022-11-18 18:33:54,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19672 to 5589. [2022-11-18 18:33:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5589 states, 5588 states have (on average 1.664638511095204) internal successors, (9302), 5588 states have internal predecessors, (9302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5589 states to 5589 states and 9302 transitions. [2022-11-18 18:33:54,946 INFO L78 Accepts]: Start accepts. Automaton has 5589 states and 9302 transitions. Word has length 3705 [2022-11-18 18:33:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:33:54,948 INFO L495 AbstractCegarLoop]: Abstraction has 5589 states and 9302 transitions. [2022-11-18 18:33:54,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 529.2857142857143) internal successors, (3705), 7 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:33:54,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5589 states and 9302 transitions. [2022-11-18 18:33:55,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3706 [2022-11-18 18:33:55,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:33:55,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:33:55,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 18:33:55,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 18:33:55,283 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:33:55,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:33:55,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1763589454, now seen corresponding path program 1 times [2022-11-18 18:33:55,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:33:55,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865221608] [2022-11-18 18:33:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:55,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:33:56,727 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:33:56,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108826456] [2022-11-18 18:33:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:33:56,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:33:56,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:33:56,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:33:56,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 18:34:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:11,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 33328 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:34:11,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:14,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:14,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:14,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865221608] [2022-11-18 18:34:14,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:34:14,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108826456] [2022-11-18 18:34:14,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108826456] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:14,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:14,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:34:14,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324880448] [2022-11-18 18:34:14,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:14,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:34:14,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:14,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:34:14,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:34:14,956 INFO L87 Difference]: Start difference. First operand 5589 states and 9302 transitions. Second operand has 6 states, 6 states have (on average 617.5) internal successors, (3705), 6 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:18,019 INFO L93 Difference]: Finished difference Result 19884 states and 33094 transitions. [2022-11-18 18:34:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:34:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 617.5) internal successors, (3705), 6 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3705 [2022-11-18 18:34:18,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:18,042 INFO L225 Difference]: With dead ends: 19884 [2022-11-18 18:34:18,042 INFO L226 Difference]: Without dead ends: 15139 [2022-11-18 18:34:18,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3706 GetRequests, 3700 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:34:18,049 INFO L413 NwaCegarLoop]: 9425 mSDtfsCounter, 60883 mSDsluCounter, 16860 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60883 SdHoareTripleChecker+Valid, 26285 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:18,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60883 Valid, 26285 Invalid, 1688 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-18 18:34:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15139 states. [2022-11-18 18:34:18,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15139 to 5654. [2022-11-18 18:34:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5654 states, 5653 states have (on average 1.6644259685122944) internal successors, (9409), 5653 states have internal predecessors, (9409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5654 states to 5654 states and 9409 transitions. [2022-11-18 18:34:18,192 INFO L78 Accepts]: Start accepts. Automaton has 5654 states and 9409 transitions. Word has length 3705 [2022-11-18 18:34:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:18,193 INFO L495 AbstractCegarLoop]: Abstraction has 5654 states and 9409 transitions. [2022-11-18 18:34:18,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 617.5) internal successors, (3705), 6 states have internal predecessors, (3705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5654 states and 9409 transitions. [2022-11-18 18:34:18,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3707 [2022-11-18 18:34:18,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:18,313 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:18,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:18,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:18,523 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:18,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:18,525 INFO L85 PathProgramCache]: Analyzing trace with hash 479435272, now seen corresponding path program 1 times [2022-11-18 18:34:18,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:18,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208712498] [2022-11-18 18:34:18,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:18,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:19,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:34:19,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [746366121] [2022-11-18 18:34:19,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:19,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:19,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:19,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:20,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 18:34:34,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:34:34,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 33331 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 18:34:34,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:34:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:34:42,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:34:42,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:34:42,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208712498] [2022-11-18 18:34:42,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:34:42,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746366121] [2022-11-18 18:34:42,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746366121] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:34:42,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:34:42,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:34:42,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286660819] [2022-11-18 18:34:42,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:34:42,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:34:42,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:34:42,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:34:42,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:34:42,483 INFO L87 Difference]: Start difference. First operand 5654 states and 9409 transitions. Second operand has 6 states, 6 states have (on average 617.6666666666666) internal successors, (3706), 6 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:34:45,624 INFO L93 Difference]: Finished difference Result 20399 states and 33947 transitions. [2022-11-18 18:34:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:34:45,625 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 617.6666666666666) internal successors, (3706), 6 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3706 [2022-11-18 18:34:45,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:34:45,640 INFO L225 Difference]: With dead ends: 20399 [2022-11-18 18:34:45,641 INFO L226 Difference]: Without dead ends: 15589 [2022-11-18 18:34:45,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3707 GetRequests, 3701 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:34:45,647 INFO L413 NwaCegarLoop]: 14877 mSDtfsCounter, 38239 mSDsluCounter, 22313 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38239 SdHoareTripleChecker+Valid, 37190 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:34:45,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38239 Valid, 37190 Invalid, 1985 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-18 18:34:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15589 states. [2022-11-18 18:34:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15589 to 5974. [2022-11-18 18:34:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5974 states, 5973 states have (on average 1.6643227858697471) internal successors, (9941), 5973 states have internal predecessors, (9941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5974 states to 5974 states and 9941 transitions. [2022-11-18 18:34:45,772 INFO L78 Accepts]: Start accepts. Automaton has 5974 states and 9941 transitions. Word has length 3706 [2022-11-18 18:34:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:34:45,774 INFO L495 AbstractCegarLoop]: Abstraction has 5974 states and 9941 transitions. [2022-11-18 18:34:45,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 617.6666666666666) internal successors, (3706), 6 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:34:45,775 INFO L276 IsEmpty]: Start isEmpty. Operand 5974 states and 9941 transitions. [2022-11-18 18:34:45,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3708 [2022-11-18 18:34:45,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:34:45,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:34:46,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 18:34:46,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:46,092 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:34:46,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:34:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash 753263010, now seen corresponding path program 1 times [2022-11-18 18:34:46,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:34:46,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503249690] [2022-11-18 18:34:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:46,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:34:47,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:34:47,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801840307] [2022-11-18 18:34:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:34:47,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:34:47,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:34:47,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:34:47,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 18:35:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:01,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 33334 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 18:35:01,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:12,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:35:12,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:12,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503249690] [2022-11-18 18:35:12,391 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:35:12,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801840307] [2022-11-18 18:35:12,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801840307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:35:12,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:35:12,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:35:12,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412566312] [2022-11-18 18:35:12,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:35:12,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:35:12,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:12,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:35:12,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:35:12,397 INFO L87 Difference]: Start difference. First operand 5974 states and 9941 transitions. Second operand has 5 states, 5 states have (on average 741.4) internal successors, (3707), 5 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:15,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:15,291 INFO L93 Difference]: Finished difference Result 15912 states and 26479 transitions. [2022-11-18 18:35:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 18:35:15,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 741.4) internal successors, (3707), 5 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3707 [2022-11-18 18:35:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:15,305 INFO L225 Difference]: With dead ends: 15912 [2022-11-18 18:35:15,305 INFO L226 Difference]: Without dead ends: 10782 [2022-11-18 18:35:15,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3707 GetRequests, 3703 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:35:15,313 INFO L413 NwaCegarLoop]: 14879 mSDtfsCounter, 14001 mSDsluCounter, 22314 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14001 SdHoareTripleChecker+Valid, 37193 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:15,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14001 Valid, 37193 Invalid, 1975 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-18 18:35:15,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10782 states. [2022-11-18 18:35:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10782 to 6295. [2022-11-18 18:35:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6295 states, 6294 states have (on average 1.6641245630759454) internal successors, (10474), 6294 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6295 states to 6295 states and 10474 transitions. [2022-11-18 18:35:15,446 INFO L78 Accepts]: Start accepts. Automaton has 6295 states and 10474 transitions. Word has length 3707 [2022-11-18 18:35:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:15,448 INFO L495 AbstractCegarLoop]: Abstraction has 6295 states and 10474 transitions. [2022-11-18 18:35:15,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 741.4) internal successors, (3707), 5 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 6295 states and 10474 transitions. [2022-11-18 18:35:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3708 [2022-11-18 18:35:15,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:15,581 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:15,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:15,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 18:35:15,791 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:35:15,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1697078048, now seen corresponding path program 1 times [2022-11-18 18:35:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:15,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766982799] [2022-11-18 18:35:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:17,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:35:17,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874872847] [2022-11-18 18:35:17,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:17,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:17,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:17,067 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:17,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 18:35:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:35:33,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 33334 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 18:35:33,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:35:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:35:40,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:35:40,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:35:40,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766982799] [2022-11-18 18:35:40,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:35:40,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874872847] [2022-11-18 18:35:40,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874872847] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:35:40,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:35:40,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:35:40,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280225769] [2022-11-18 18:35:40,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:35:40,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:35:40,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:35:40,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:35:40,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:35:40,234 INFO L87 Difference]: Start difference. First operand 6295 states and 10474 transitions. Second operand has 8 states, 8 states have (on average 463.375) internal successors, (3707), 8 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:35:44,084 INFO L93 Difference]: Finished difference Result 40480 states and 67345 transitions. [2022-11-18 18:35:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-18 18:35:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 463.375) internal successors, (3707), 8 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3707 [2022-11-18 18:35:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:35:44,112 INFO L225 Difference]: With dead ends: 40480 [2022-11-18 18:35:44,112 INFO L226 Difference]: Without dead ends: 34967 [2022-11-18 18:35:44,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3714 GetRequests, 3700 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-11-18 18:35:44,126 INFO L413 NwaCegarLoop]: 9129 mSDtfsCounter, 100836 mSDsluCounter, 43350 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100836 SdHoareTripleChecker+Valid, 52479 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:35:44,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100836 Valid, 52479 Invalid, 1275 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [12 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-18 18:35:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34967 states. [2022-11-18 18:35:44,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34967 to 9181. [2022-11-18 18:35:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9181 states, 9180 states have (on average 1.6639433551198257) internal successors, (15275), 9180 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9181 states to 9181 states and 15275 transitions. [2022-11-18 18:35:44,541 INFO L78 Accepts]: Start accepts. Automaton has 9181 states and 15275 transitions. Word has length 3707 [2022-11-18 18:35:44,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:35:44,542 INFO L495 AbstractCegarLoop]: Abstraction has 9181 states and 15275 transitions. [2022-11-18 18:35:44,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 463.375) internal successors, (3707), 8 states have internal predecessors, (3707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:35:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 9181 states and 15275 transitions. [2022-11-18 18:35:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3709 [2022-11-18 18:35:44,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:35:44,687 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:35:44,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 18:35:44,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:44,913 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:35:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:35:44,915 INFO L85 PathProgramCache]: Analyzing trace with hash -508253626, now seen corresponding path program 1 times [2022-11-18 18:35:44,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:35:44,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308452006] [2022-11-18 18:35:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:44,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:35:46,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:35:46,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229486306] [2022-11-18 18:35:46,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:35:46,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:35:46,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:35:46,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:35:46,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 18:36:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 33337 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 18:36:02,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:04,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:36:04,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:04,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308452006] [2022-11-18 18:36:04,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:36:04,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229486306] [2022-11-18 18:36:04,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229486306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:04,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:04,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:36:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836316709] [2022-11-18 18:36:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:04,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:36:04,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:04,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:36:04,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:36:04,361 INFO L87 Difference]: Start difference. First operand 9181 states and 15275 transitions. Second operand has 7 states, 7 states have (on average 529.7142857142857) internal successors, (3708), 7 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:36:13,696 INFO L93 Difference]: Finished difference Result 50557 states and 84105 transitions. [2022-11-18 18:36:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 18:36:13,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 529.7142857142857) internal successors, (3708), 7 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3708 [2022-11-18 18:36:13,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:36:13,726 INFO L225 Difference]: With dead ends: 50557 [2022-11-18 18:36:13,726 INFO L226 Difference]: Without dead ends: 43655 [2022-11-18 18:36:13,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3713 GetRequests, 3702 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-11-18 18:36:13,737 INFO L413 NwaCegarLoop]: 22350 mSDtfsCounter, 61919 mSDsluCounter, 96772 mSDsCounter, 0 mSdLazyCounter, 5870 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61919 SdHoareTripleChecker+Valid, 119122 SdHoareTripleChecker+Invalid, 5874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:36:13,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61919 Valid, 119122 Invalid, 5874 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [4 Valid, 5870 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-11-18 18:36:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43655 states. [2022-11-18 18:36:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43655 to 9230. [2022-11-18 18:36:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9230 states, 9229 states have (on average 1.663452161664319) internal successors, (15352), 9229 states have internal predecessors, (15352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:14,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9230 states to 9230 states and 15352 transitions. [2022-11-18 18:36:14,026 INFO L78 Accepts]: Start accepts. Automaton has 9230 states and 15352 transitions. Word has length 3708 [2022-11-18 18:36:14,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:36:14,027 INFO L495 AbstractCegarLoop]: Abstraction has 9230 states and 15352 transitions. [2022-11-18 18:36:14,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 529.7142857142857) internal successors, (3708), 7 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:14,028 INFO L276 IsEmpty]: Start isEmpty. Operand 9230 states and 15352 transitions. [2022-11-18 18:36:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3709 [2022-11-18 18:36:14,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:36:14,172 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:14,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:14,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 18:36:14,387 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:36:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:14,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1004976772, now seen corresponding path program 1 times [2022-11-18 18:36:14,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:14,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045746793] [2022-11-18 18:36:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:14,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:15,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:36:15,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094560098] [2022-11-18 18:36:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:15,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:15,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:15,575 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:15,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 18:36:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:36:32,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 33337 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-18 18:36:32,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:36:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:36:39,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:36:39,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:36:39,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045746793] [2022-11-18 18:36:39,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:36:39,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094560098] [2022-11-18 18:36:39,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094560098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:36:39,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:36:39,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 18:36:39,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512815209] [2022-11-18 18:36:39,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:36:39,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 18:36:39,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:36:39,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 18:36:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:36:39,511 INFO L87 Difference]: Start difference. First operand 9230 states and 15352 transitions. Second operand has 10 states, 10 states have (on average 370.8) internal successors, (3708), 10 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:36:49,258 INFO L93 Difference]: Finished difference Result 44743 states and 74379 transitions. [2022-11-18 18:36:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 18:36:49,260 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 370.8) internal successors, (3708), 10 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3708 [2022-11-18 18:36:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:36:49,285 INFO L225 Difference]: With dead ends: 44743 [2022-11-18 18:36:49,286 INFO L226 Difference]: Without dead ends: 37792 [2022-11-18 18:36:49,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3724 GetRequests, 3699 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2022-11-18 18:36:49,296 INFO L413 NwaCegarLoop]: 15046 mSDtfsCounter, 146920 mSDsluCounter, 102094 mSDsCounter, 0 mSdLazyCounter, 5187 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146920 SdHoareTripleChecker+Valid, 117140 SdHoareTripleChecker+Invalid, 5210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 5187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-18 18:36:49,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146920 Valid, 117140 Invalid, 5210 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [23 Valid, 5187 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-11-18 18:36:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37792 states. [2022-11-18 18:36:49,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37792 to 9231. [2022-11-18 18:36:49,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9231 states, 9230 states have (on average 1.6634886240520044) internal successors, (15354), 9230 states have internal predecessors, (15354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9231 states to 9231 states and 15354 transitions. [2022-11-18 18:36:49,679 INFO L78 Accepts]: Start accepts. Automaton has 9231 states and 15354 transitions. Word has length 3708 [2022-11-18 18:36:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:36:49,680 INFO L495 AbstractCegarLoop]: Abstraction has 9231 states and 15354 transitions. [2022-11-18 18:36:49,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 370.8) internal successors, (3708), 10 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:36:49,681 INFO L276 IsEmpty]: Start isEmpty. Operand 9231 states and 15354 transitions. [2022-11-18 18:36:49,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3709 [2022-11-18 18:36:49,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:36:49,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:36:49,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 18:36:50,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:50,023 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:36:50,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:36:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1477535724, now seen corresponding path program 1 times [2022-11-18 18:36:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:36:50,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497609829] [2022-11-18 18:36:50,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:50,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:36:51,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:36:51,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135667560] [2022-11-18 18:36:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:36:51,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:36:51,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:36:51,282 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:36:51,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 18:37:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 33337 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 18:37:09,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:37:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:37:25,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:37:25,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:37:25,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497609829] [2022-11-18 18:37:25,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:37:25,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135667560] [2022-11-18 18:37:25,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135667560] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:37:25,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:37:25,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:37:25,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073189263] [2022-11-18 18:37:25,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:37:25,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:37:25,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:37:25,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:37:25,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:37:25,114 INFO L87 Difference]: Start difference. First operand 9231 states and 15354 transitions. Second operand has 8 states, 8 states have (on average 463.5) internal successors, (3708), 8 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:37:35,097 INFO L93 Difference]: Finished difference Result 70304 states and 116902 transitions. [2022-11-18 18:37:35,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:37:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 463.5) internal successors, (3708), 8 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3708 [2022-11-18 18:37:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:37:35,140 INFO L225 Difference]: With dead ends: 70304 [2022-11-18 18:37:35,140 INFO L226 Difference]: Without dead ends: 63352 [2022-11-18 18:37:35,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3720 GetRequests, 3701 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:37:35,153 INFO L413 NwaCegarLoop]: 16155 mSDtfsCounter, 99708 mSDsluCounter, 67870 mSDsCounter, 0 mSdLazyCounter, 4996 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99708 SdHoareTripleChecker+Valid, 84025 SdHoareTripleChecker+Invalid, 5002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-11-18 18:37:35,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99708 Valid, 84025 Invalid, 5002 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [6 Valid, 4996 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-11-18 18:37:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63352 states. [2022-11-18 18:37:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63352 to 10672. [2022-11-18 18:37:35,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10672 states, 10671 states have (on average 1.6633867491331646) internal successors, (17750), 10671 states have internal predecessors, (17750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10672 states to 10672 states and 17750 transitions. [2022-11-18 18:37:35,592 INFO L78 Accepts]: Start accepts. Automaton has 10672 states and 17750 transitions. Word has length 3708 [2022-11-18 18:37:35,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:37:35,594 INFO L495 AbstractCegarLoop]: Abstraction has 10672 states and 17750 transitions. [2022-11-18 18:37:35,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 463.5) internal successors, (3708), 8 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:37:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 10672 states and 17750 transitions. [2022-11-18 18:37:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3710 [2022-11-18 18:37:35,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:37:35,699 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:37:35,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-18 18:37:35,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:35,900 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:37:35,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:37:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash -150243530, now seen corresponding path program 1 times [2022-11-18 18:37:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:37:35,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695970616] [2022-11-18 18:37:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:35,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:37:37,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:37:37,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234057200] [2022-11-18 18:37:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:37:37,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:37:37,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:37:37,128 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:37:37,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 18:37:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:37:54,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 33340 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-18 18:37:54,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:10,177 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:38:10,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:10,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695970616] [2022-11-18 18:38:10,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:38:10,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234057200] [2022-11-18 18:38:10,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234057200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:10,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:38:10,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-18 18:38:10,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923163835] [2022-11-18 18:38:10,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:10,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 18:38:10,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:10,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 18:38:10,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:38:10,183 INFO L87 Difference]: Start difference. First operand 10672 states and 17750 transitions. Second operand has 8 states, 8 states have (on average 463.625) internal successors, (3709), 8 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:19,953 INFO L93 Difference]: Finished difference Result 71047 states and 118121 transitions. [2022-11-18 18:38:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 18:38:19,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 463.625) internal successors, (3709), 8 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3709 [2022-11-18 18:38:19,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:20,000 INFO L225 Difference]: With dead ends: 71047 [2022-11-18 18:38:20,000 INFO L226 Difference]: Without dead ends: 63370 [2022-11-18 18:38:20,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3721 GetRequests, 3702 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-11-18 18:38:20,011 INFO L413 NwaCegarLoop]: 11128 mSDtfsCounter, 119874 mSDsluCounter, 50586 mSDsCounter, 0 mSdLazyCounter, 4770 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119874 SdHoareTripleChecker+Valid, 61714 SdHoareTripleChecker+Invalid, 4775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:20,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119874 Valid, 61714 Invalid, 4775 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [5 Valid, 4770 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-11-18 18:38:20,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63370 states. [2022-11-18 18:38:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63370 to 10674. [2022-11-18 18:38:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10674 states, 10673 states have (on average 1.6632624379274805) internal successors, (17752), 10673 states have internal predecessors, (17752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10674 states to 10674 states and 17752 transitions. [2022-11-18 18:38:20,453 INFO L78 Accepts]: Start accepts. Automaton has 10674 states and 17752 transitions. Word has length 3709 [2022-11-18 18:38:20,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:20,455 INFO L495 AbstractCegarLoop]: Abstraction has 10674 states and 17752 transitions. [2022-11-18 18:38:20,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 463.625) internal successors, (3709), 8 states have internal predecessors, (3709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 10674 states and 17752 transitions. [2022-11-18 18:38:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3711 [2022-11-18 18:38:20,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:20,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:20,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-18 18:38:20,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 18:38:20,803 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:20,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1718152890, now seen corresponding path program 1 times [2022-11-18 18:38:20,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:20,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223606204] [2022-11-18 18:38:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:20,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:22,056 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:38:22,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074904384] [2022-11-18 18:38:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:22,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:22,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:22,058 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:22,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 18:38:40,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:38:40,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 33343 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-18 18:38:40,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:38:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:38:47,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:38:47,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:38:47,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223606204] [2022-11-18 18:38:47,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:38:47,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074904384] [2022-11-18 18:38:47,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074904384] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:38:47,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:38:47,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 18:38:47,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435120764] [2022-11-18 18:38:47,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:38:47,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 18:38:47,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:38:47,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 18:38:47,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 18:38:47,835 INFO L87 Difference]: Start difference. First operand 10674 states and 17752 transitions. Second operand has 5 states, 5 states have (on average 742.0) internal successors, (3710), 5 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:52,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:38:52,453 INFO L93 Difference]: Finished difference Result 33578 states and 55837 transitions. [2022-11-18 18:38:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:38:52,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 742.0) internal successors, (3710), 5 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3710 [2022-11-18 18:38:52,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:38:52,476 INFO L225 Difference]: With dead ends: 33578 [2022-11-18 18:38:52,476 INFO L226 Difference]: Without dead ends: 25899 [2022-11-18 18:38:52,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3710 GetRequests, 3706 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:38:52,486 INFO L413 NwaCegarLoop]: 8791 mSDtfsCounter, 30788 mSDsluCounter, 22041 mSDsCounter, 0 mSdLazyCounter, 1909 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30788 SdHoareTripleChecker+Valid, 30832 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:38:52,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30788 Valid, 30832 Invalid, 1912 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 1909 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-11-18 18:38:52,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25899 states. [2022-11-18 18:38:52,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25899 to 10684. [2022-11-18 18:38:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10684 states, 10683 states have (on average 1.66301600673968) internal successors, (17766), 10683 states have internal predecessors, (17766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10684 states to 10684 states and 17766 transitions. [2022-11-18 18:38:52,788 INFO L78 Accepts]: Start accepts. Automaton has 10684 states and 17766 transitions. Word has length 3710 [2022-11-18 18:38:52,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:38:52,789 INFO L495 AbstractCegarLoop]: Abstraction has 10684 states and 17766 transitions. [2022-11-18 18:38:52,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 742.0) internal successors, (3710), 5 states have internal predecessors, (3710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:38:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 10684 states and 17766 transitions. [2022-11-18 18:38:52,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3712 [2022-11-18 18:38:52,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:38:52,905 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:38:53,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 18:38:53,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 18:38:53,119 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:38:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:38:53,121 INFO L85 PathProgramCache]: Analyzing trace with hash 2029805356, now seen corresponding path program 1 times [2022-11-18 18:38:53,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:38:53,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905674205] [2022-11-18 18:38:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:53,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:38:54,564 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:38:54,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585011729] [2022-11-18 18:38:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:38:54,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:38:54,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:38:54,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:38:54,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 18:39:13,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 33346 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:39:13,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:17,248 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:17,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:39:17,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:17,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905674205] [2022-11-18 18:39:17,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:39:17,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585011729] [2022-11-18 18:39:17,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585011729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:39:17,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:39:17,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 18:39:17,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105022582] [2022-11-18 18:39:17,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:39:17,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 18:39:17,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:17,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 18:39:17,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 18:39:17,256 INFO L87 Difference]: Start difference. First operand 10684 states and 17766 transitions. Second operand has 6 states, 6 states have (on average 618.5) internal successors, (3711), 6 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:39:20,428 INFO L93 Difference]: Finished difference Result 33562 states and 55811 transitions. [2022-11-18 18:39:20,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 18:39:20,430 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 618.5) internal successors, (3711), 6 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3711 [2022-11-18 18:39:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:39:20,453 INFO L225 Difference]: With dead ends: 33562 [2022-11-18 18:39:20,453 INFO L226 Difference]: Without dead ends: 25873 [2022-11-18 18:39:20,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3711 GetRequests, 3706 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:39:20,463 INFO L413 NwaCegarLoop]: 8880 mSDtfsCounter, 43253 mSDsluCounter, 23748 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43253 SdHoareTripleChecker+Valid, 32628 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-18 18:39:20,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43253 Valid, 32628 Invalid, 1642 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-18 18:39:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25873 states. [2022-11-18 18:39:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25873 to 10686. [2022-11-18 18:39:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10686 states, 10685 states have (on average 1.6629854936827329) internal successors, (17769), 10685 states have internal predecessors, (17769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10686 states to 10686 states and 17769 transitions. [2022-11-18 18:39:20,730 INFO L78 Accepts]: Start accepts. Automaton has 10686 states and 17769 transitions. Word has length 3711 [2022-11-18 18:39:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:39:20,730 INFO L495 AbstractCegarLoop]: Abstraction has 10686 states and 17769 transitions. [2022-11-18 18:39:20,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 618.5) internal successors, (3711), 6 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 10686 states and 17769 transitions. [2022-11-18 18:39:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3712 [2022-11-18 18:39:20,852 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:39:20,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:20,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:21,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 18:39:21,054 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:39:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1994269358, now seen corresponding path program 1 times [2022-11-18 18:39:21,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:21,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339029801] [2022-11-18 18:39:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:21,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:22,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:39:22,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370687365] [2022-11-18 18:39:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:22,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:22,530 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:22,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 18:39:41,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:39:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 33346 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 18:39:41,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:39:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:39:43,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:39:43,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:39:43,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339029801] [2022-11-18 18:39:43,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:39:43,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370687365] [2022-11-18 18:39:43,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370687365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:39:43,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:39:43,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:39:43,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050318687] [2022-11-18 18:39:43,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:39:43,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:39:43,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:39:43,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:39:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:39:43,982 INFO L87 Difference]: Start difference. First operand 10686 states and 17769 transitions. Second operand has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:39:48,404 INFO L93 Difference]: Finished difference Result 41310 states and 68687 transitions. [2022-11-18 18:39:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 18:39:48,412 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3711 [2022-11-18 18:39:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:39:48,441 INFO L225 Difference]: With dead ends: 41310 [2022-11-18 18:39:48,441 INFO L226 Difference]: Without dead ends: 33619 [2022-11-18 18:39:48,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3713 GetRequests, 3705 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2022-11-18 18:39:48,451 INFO L413 NwaCegarLoop]: 15152 mSDtfsCounter, 46408 mSDsluCounter, 37565 mSDsCounter, 0 mSdLazyCounter, 2227 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46408 SdHoareTripleChecker+Valid, 52717 SdHoareTripleChecker+Invalid, 2229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-18 18:39:48,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46408 Valid, 52717 Invalid, 2229 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [2 Valid, 2227 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-18 18:39:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33619 states. [2022-11-18 18:39:48,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33619 to 10738. [2022-11-18 18:39:48,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10738 states, 10737 states have (on average 1.6628480953711464) internal successors, (17854), 10737 states have internal predecessors, (17854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10738 states to 10738 states and 17854 transitions. [2022-11-18 18:39:48,795 INFO L78 Accepts]: Start accepts. Automaton has 10738 states and 17854 transitions. Word has length 3711 [2022-11-18 18:39:48,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:39:48,796 INFO L495 AbstractCegarLoop]: Abstraction has 10738 states and 17854 transitions. [2022-11-18 18:39:48,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:39:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 10738 states and 17854 transitions. [2022-11-18 18:39:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3712 [2022-11-18 18:39:48,909 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:39:48,911 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:39:49,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 18:39:49,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 18:39:49,113 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:39:49,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:39:49,115 INFO L85 PathProgramCache]: Analyzing trace with hash 155054770, now seen corresponding path program 1 times [2022-11-18 18:39:49,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:39:49,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533473954] [2022-11-18 18:39:49,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:49,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:39:50,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:39:50,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [18418395] [2022-11-18 18:39:50,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:39:50,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:39:50,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:39:50,587 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:39:50,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 18:40:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:40:10,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 33346 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-18 18:40:10,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:40:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:40:25,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:40:25,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:40:25,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533473954] [2022-11-18 18:40:25,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:40:25,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18418395] [2022-11-18 18:40:25,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18418395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:40:25,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:40:25,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:40:25,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757517836] [2022-11-18 18:40:25,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:40:25,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:40:25,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:40:25,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:40:25,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:40:25,456 INFO L87 Difference]: Start difference. First operand 10738 states and 17854 transitions. Second operand has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:00,316 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:41:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:41:17,983 INFO L93 Difference]: Finished difference Result 32326 states and 53715 transitions. [2022-11-18 18:41:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:41:17,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3711 [2022-11-18 18:41:17,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:41:18,002 INFO L225 Difference]: With dead ends: 32326 [2022-11-18 18:41:18,003 INFO L226 Difference]: Without dead ends: 24583 [2022-11-18 18:41:18,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3711 GetRequests, 3705 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-11-18 18:41:18,011 INFO L413 NwaCegarLoop]: 2887 mSDtfsCounter, 28093 mSDsluCounter, 4876 mSDsCounter, 0 mSdLazyCounter, 34811 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28093 SdHoareTripleChecker+Valid, 7763 SdHoareTripleChecker+Invalid, 34813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.4s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34811 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.2s IncrementalHoareTripleChecker+Time [2022-11-18 18:41:18,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28093 Valid, 7763 Invalid, 34813 Unknown, 0 Unchecked, 0.4s Time], IncrementalHoareTripleChecker [1 Valid, 34811 Invalid, 1 Unknown, 0 Unchecked, 51.2s Time] [2022-11-18 18:41:18,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24583 states. [2022-11-18 18:41:18,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24583 to 13621. [2022-11-18 18:41:18,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13621 states, 13620 states have (on average 1.662848751835536) internal successors, (22648), 13620 states have internal predecessors, (22648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13621 states to 13621 states and 22648 transitions. [2022-11-18 18:41:18,181 INFO L78 Accepts]: Start accepts. Automaton has 13621 states and 22648 transitions. Word has length 3711 [2022-11-18 18:41:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:41:18,182 INFO L495 AbstractCegarLoop]: Abstraction has 13621 states and 22648 transitions. [2022-11-18 18:41:18,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:41:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 13621 states and 22648 transitions. [2022-11-18 18:41:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3712 [2022-11-18 18:41:18,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:41:18,385 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:41:18,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 18:41:18,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 18:41:18,586 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:41:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:41:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1541754932, now seen corresponding path program 1 times [2022-11-18 18:41:18,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:41:18,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314921005] [2022-11-18 18:41:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:18,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:41:19,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:41:19,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922757189] [2022-11-18 18:41:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:41:19,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:41:19,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:41:19,704 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:41:19,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 18:41:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:41:39,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 33346 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 18:41:39,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 18:42:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 564 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 18:42:26,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 18:42:26,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 18:42:26,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314921005] [2022-11-18 18:42:26,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 18:42:26,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922757189] [2022-11-18 18:42:26,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922757189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 18:42:26,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 18:42:26,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 18:42:26,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202306820] [2022-11-18 18:42:26,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 18:42:26,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 18:42:26,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 18:42:26,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 18:42:26,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:42:26,949 INFO L87 Difference]: Start difference. First operand 13621 states and 22648 transitions. Second operand has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:42:55,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 18:43:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 18:43:12,924 INFO L93 Difference]: Finished difference Result 31890 states and 52954 transitions. [2022-11-18 18:43:12,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 18:43:12,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3711 [2022-11-18 18:43:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 18:43:12,940 INFO L225 Difference]: With dead ends: 31890 [2022-11-18 18:43:12,940 INFO L226 Difference]: Without dead ends: 22697 [2022-11-18 18:43:12,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3710 GetRequests, 3705 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 18:43:12,947 INFO L413 NwaCegarLoop]: 4210 mSDtfsCounter, 12663 mSDsluCounter, 5423 mSDsCounter, 0 mSdLazyCounter, 29156 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12663 SdHoareTripleChecker+Valid, 9633 SdHoareTripleChecker+Invalid, 29158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29156 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.0s IncrementalHoareTripleChecker+Time [2022-11-18 18:43:12,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12663 Valid, 9633 Invalid, 29158 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [1 Valid, 29156 Invalid, 1 Unknown, 0 Unchecked, 45.0s Time] [2022-11-18 18:43:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22697 states. [2022-11-18 18:43:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22697 to 16867. [2022-11-18 18:43:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16867 states, 16866 states have (on average 1.6612119056089174) internal successors, (28018), 16866 states have internal predecessors, (28018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:13,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16867 states to 16867 states and 28018 transitions. [2022-11-18 18:43:13,194 INFO L78 Accepts]: Start accepts. Automaton has 16867 states and 28018 transitions. Word has length 3711 [2022-11-18 18:43:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 18:43:13,196 INFO L495 AbstractCegarLoop]: Abstraction has 16867 states and 28018 transitions. [2022-11-18 18:43:13,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 530.1428571428571) internal successors, (3711), 7 states have internal predecessors, (3711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 18:43:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 16867 states and 28018 transitions. [2022-11-18 18:43:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3712 [2022-11-18 18:43:13,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 18:43:13,311 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 18:43:13,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 18:43:13,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:13,512 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 18:43:13,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 18:43:13,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2088695114, now seen corresponding path program 1 times [2022-11-18 18:43:13,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 18:43:13,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399957215] [2022-11-18 18:43:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:13,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 18:43:14,813 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 18:43:14,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616331475] [2022-11-18 18:43:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 18:43:14,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 18:43:14,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 18:43:14,817 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 18:43:14,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ca0be619-a254-429e-a740-b7fd2f91fe39/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 18:43:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 18:43:34,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 33346 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-18 18:43:34,554 INFO L286 TraceCheckSpWp]: Computing forward predicates...