./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1c50dd7e64abcc7a7eef6ea31e37156afb1e4322422284686cac6e6613b192c7 --- 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-38b53e6 [2022-11-25 17:45:16,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:45:16,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:45:17,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:45:17,035 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:45:17,036 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:45:17,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:45:17,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:45:17,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:45:17,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:45:17,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:45:17,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:45:17,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:45:17,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:45:17,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:45:17,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:45:17,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:45:17,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:45:17,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:45:17,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:45:17,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:45:17,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:45:17,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:45:17,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:45:17,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:45:17,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:45:17,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:45:17,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:45:17,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:45:17,112 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:45:17,112 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:45:17,114 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:45:17,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:45:17,118 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:45:17,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:45:17,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:45:17,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:45:17,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:45:17,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:45:17,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:45:17,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:45:17,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:45:17,156 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:45:17,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:45:17,161 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:45:17,162 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:45:17,163 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:45:17,163 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:45:17,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:45:17,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:45:17,164 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:45:17,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:45:17,166 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:45:17,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:45:17,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:45:17,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:45:17,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:45:17,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:45:17,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:45:17,168 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:45:17,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:45:17,168 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:45:17,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:45:17,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:45:17,169 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:45:17,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:45:17,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:45:17,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:45:17,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:45:17,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:45:17,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:45:17,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:45:17,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:45:17,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:45:17,172 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:45:17,172 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:45:17,173 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c50dd7e64abcc7a7eef6ea31e37156afb1e4322422284686cac6e6613b192c7 [2022-11-25 17:45:17,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:45:17,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:45:17,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:45:17,661 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:45:17,662 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:45:17,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2022-11-25 17:45:21,332 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:45:21,627 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:45:21,627 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c [2022-11-25 17:45:21,635 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/data/da31f2f19/ad63e3a5deb64ab8ab5783108a4302c3/FLAG134779a32 [2022-11-25 17:45:21,653 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/data/da31f2f19/ad63e3a5deb64ab8ab5783108a4302c3 [2022-11-25 17:45:21,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:45:21,658 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:45:21,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:45:21,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:45:21,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:45:21,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:45:21" (1/1) ... [2022-11-25 17:45:21,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a4caa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:21, skipping insertion in model container [2022-11-25 17:45:21,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:45:21" (1/1) ... [2022-11-25 17:45:21,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:45:21,694 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:45:21,878 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c[458,471] [2022-11-25 17:45:21,900 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:45:21,913 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:45:21,947 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound10.c[458,471] [2022-11-25 17:45:21,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:45:22,002 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:45:22,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22 WrapperNode [2022-11-25 17:45:22,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:45:22,005 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:45:22,005 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:45:22,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:45:22,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,045 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2022-11-25 17:45:22,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:45:22,046 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:45:22,046 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:45:22,046 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:45:22,054 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,056 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,056 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,060 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,065 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,068 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:45:22,069 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:45:22,069 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:45:22,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:45:22,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (1/1) ... [2022-11-25 17:45:22,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:45:22,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:22,110 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:45:22,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:45:22,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:45:22,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:45:22,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:45:22,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:45:22,155 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 17:45:22,155 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 17:45:22,239 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:45:22,242 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:45:22,410 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:45:22,428 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:45:22,428 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:45:22,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:45:22 BoogieIcfgContainer [2022-11-25 17:45:22,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:45:22,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:45:22,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:45:22,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:45:22,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:45:21" (1/3) ... [2022-11-25 17:45:22,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190555d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:45:22, skipping insertion in model container [2022-11-25 17:45:22,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:45:22" (2/3) ... [2022-11-25 17:45:22,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@190555d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:45:22, skipping insertion in model container [2022-11-25 17:45:22,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:45:22" (3/3) ... [2022-11-25 17:45:22,448 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound10.c [2022-11-25 17:45:22,474 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:45:22,475 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:45:22,550 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:45:22,559 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;@7d4183c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:45:22,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:45:22,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:45:22,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:45:22,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:45:22,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:22,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:45:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:22,585 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2022-11-25 17:45:22,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:22,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21747766] [2022-11-25 17:45:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:22,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:22,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:22,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21747766] [2022-11-25 17:45:22,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:45:22,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042966602] [2022-11-25 17:45:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:22,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:22,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:22,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:22,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:45:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:22,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:45:22,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:45:22,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:45:22,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042966602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:22,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:22,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:45:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995981718] [2022-11-25 17:45:22,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:22,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:45:22,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:23,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:45:23,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:45:23,014 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:45:23,049 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2022-11-25 17:45:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:45:23,052 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 17:45:23,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:45:23,064 INFO L225 Difference]: With dead ends: 37 [2022-11-25 17:45:23,064 INFO L226 Difference]: Without dead ends: 16 [2022-11-25 17:45:23,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:45:23,077 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:45:23,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:45:23,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-25 17:45:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-25 17:45:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:45:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-25 17:45:23,139 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-11-25 17:45:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:45:23,140 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-25 17:45:23,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-25 17:45:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:45:23,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:45:23,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:23,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:23,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 17:45:23,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:45:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2022-11-25 17:45:23,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:23,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506530325] [2022-11-25 17:45:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:23,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:23,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506530325] [2022-11-25 17:45:23,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:45:23,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166287155] [2022-11-25 17:45:23,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:23,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:23,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:23,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:23,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:45:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:23,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:45:23,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:45:23,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:45:23,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166287155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:23,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:23,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:45:23,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370398262] [2022-11-25 17:45:23,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:23,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:45:23,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:23,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:45:23,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:45:23,593 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:23,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:45:23,614 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-25 17:45:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:45:23,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 17:45:23,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:45:23,616 INFO L225 Difference]: With dead ends: 26 [2022-11-25 17:45:23,617 INFO L226 Difference]: Without dead ends: 18 [2022-11-25 17:45:23,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:45:23,619 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:45:23,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:45:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-25 17:45:23,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-25 17:45:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:45:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-25 17:45:23,627 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2022-11-25 17:45:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:45:23,628 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-25 17:45:23,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:23,628 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-25 17:45:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:45:23,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:45:23,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:23,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:23,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 17:45:23,837 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:45:23,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:23,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2022-11-25 17:45:23,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:23,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253700322] [2022-11-25 17:45:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:23,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:23,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:45:23,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977354684] [2022-11-25 17:45:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:23,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:23,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:23,872 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:23,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:45:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:23,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:45:23,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:45:24,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:45:24,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:24,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253700322] [2022-11-25 17:45:24,149 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:45:24,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977354684] [2022-11-25 17:45:24,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977354684] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:45:24,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:45:24,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:45:24,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602098774] [2022-11-25 17:45:24,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:24,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:45:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:24,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:45:24,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:45:24,154 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:45:24,311 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-11-25 17:45:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:45:24,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-25 17:45:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:45:24,313 INFO L225 Difference]: With dead ends: 28 [2022-11-25 17:45:24,314 INFO L226 Difference]: Without dead ends: 24 [2022-11-25 17:45:24,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:45:24,316 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:45:24,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 56 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:45:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-25 17:45:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-25 17:45:24,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:45:24,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-11-25 17:45:24,327 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2022-11-25 17:45:24,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:45:24,327 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-11-25 17:45:24,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:45:24,328 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-11-25 17:45:24,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 17:45:24,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:45:24,329 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:24,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:24,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:24,536 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:45:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:24,537 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2022-11-25 17:45:24,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:24,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115688927] [2022-11-25 17:45:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:24,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:45:24,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000830470] [2022-11-25 17:45:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:24,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:24,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:24,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:24,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:45:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:24,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:45:24,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:45:24,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:24,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:45:24,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:24,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115688927] [2022-11-25 17:45:24,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:45:24,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000830470] [2022-11-25 17:45:24,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000830470] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:45:24,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:45:24,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-25 17:45:24,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396781726] [2022-11-25 17:45:24,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:45:24,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:45:24,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:24,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:45:24,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:45:24,842 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:45:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:45:25,006 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-11-25 17:45:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:45:25,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-11-25 17:45:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:45:25,012 INFO L225 Difference]: With dead ends: 58 [2022-11-25 17:45:25,013 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 17:45:25,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:45:25,022 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:45:25,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 96 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:45:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 17:45:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-11-25 17:45:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:45:25,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-11-25 17:45:25,055 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2022-11-25 17:45:25,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:45:25,058 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-11-25 17:45:25,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:45:25,064 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-11-25 17:45:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-25 17:45:25,065 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:45:25,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:25,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:25,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:25,273 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:45:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2022-11-25 17:45:25,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:25,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400236167] [2022-11-25 17:45:25,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:25,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:25,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:45:25,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892815459] [2022-11-25 17:45:25,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:25,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:25,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:25,292 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:25,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:45:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:25,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:45:25,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:45:25,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:45:25,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:45:25,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400236167] [2022-11-25 17:45:25,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:45:25,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892815459] [2022-11-25 17:45:25,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892815459] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:45:25,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:45:25,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-25 17:45:25,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790785181] [2022-11-25 17:45:25,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:45:25,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:45:25,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:45:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:45:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:45:25,669 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 17:45:25,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:45:25,805 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-25 17:45:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:45:25,807 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-25 17:45:25,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:45:25,809 INFO L225 Difference]: With dead ends: 60 [2022-11-25 17:45:25,809 INFO L226 Difference]: Without dead ends: 52 [2022-11-25 17:45:25,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:45:25,810 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:45:25,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 40 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:45:25,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-25 17:45:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-11-25 17:45:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:45:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-11-25 17:45:25,847 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2022-11-25 17:45:25,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:45:25,847 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-11-25 17:45:25,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 17:45:25,847 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-11-25 17:45:25,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 17:45:25,848 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:45:25,849 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:45:25,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:45:26,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:26,050 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:45:26,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:45:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2022-11-25 17:45:26,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:45:26,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493147151] [2022-11-25 17:45:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:45:26,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:45:26,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553150261] [2022-11-25 17:45:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:45:26,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:45:26,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:45:26,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:45:26,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:45:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:45:26,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:45:26,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:45:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:45:26,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:45:30,489 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-25 17:45:52,457 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|))))) is different from true [2022-11-25 17:46:10,614 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int)) (or (= (mod (+ (* 29 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 6 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 10 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) 30) 0) (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-25 17:46:14,648 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-25 17:46:24,764 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-25 17:46:26,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:26,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493147151] [2022-11-25 17:46:26,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:46:26,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553150261] [2022-11-25 17:46:26,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553150261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:46:26,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:46:26,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-25 17:46:26,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284610598] [2022-11-25 17:46:26,811 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:26,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 17:46:26,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:26,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 17:46:26,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=92, Unknown=5, NotChecked=110, Total=240 [2022-11-25 17:46:26,813 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:46:27,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:27,035 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-11-25 17:46:27,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:46:27,036 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-11-25 17:46:27,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:27,039 INFO L225 Difference]: With dead ends: 51 [2022-11-25 17:46:27,039 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 17:46:27,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=51, Invalid=146, Unknown=5, NotChecked=140, Total=342 [2022-11-25 17:46:27,040 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:27,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 83 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:46:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 17:46:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-25 17:46:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-25 17:46:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-11-25 17:46:27,060 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2022-11-25 17:46:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:27,060 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-11-25 17:46:27,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:46:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-11-25 17:46:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-25 17:46:27,062 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:27,062 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:27,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 17:46:27,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:46:27,263 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:27,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:27,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2022-11-25 17:46:27,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:27,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213501916] [2022-11-25 17:46:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:27,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:27,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:46:27,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922337623] [2022-11-25 17:46:27,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:46:27,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:27,295 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:46:27,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:46:27,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:46:27,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:27,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 17:46:27,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 17:46:27,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 17:46:28,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:28,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213501916] [2022-11-25 17:46:28,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:46:28,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922337623] [2022-11-25 17:46:28,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922337623] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:28,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:46:28,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-11-25 17:46:28,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352195837] [2022-11-25 17:46:28,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:28,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:46:28,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:28,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:46:28,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:46:28,216 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:46:29,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:29,239 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2022-11-25 17:46:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:46:29,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37 [2022-11-25 17:46:29,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:29,241 INFO L225 Difference]: With dead ends: 62 [2022-11-25 17:46:29,242 INFO L226 Difference]: Without dead ends: 54 [2022-11-25 17:46:29,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2022-11-25 17:46:29,243 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 48 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:29,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 187 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:46:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-25 17:46:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-11-25 17:46:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:46:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2022-11-25 17:46:29,267 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2022-11-25 17:46:29,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:29,268 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2022-11-25 17:46:29,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:46:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2022-11-25 17:46:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 17:46:29,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:29,270 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:29,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:29,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:29,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:29,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:29,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2022-11-25 17:46:29,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:29,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408282435] [2022-11-25 17:46:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:29,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:29,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:46:29,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593571210] [2022-11-25 17:46:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:29,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:29,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:29,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:46:29,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:46:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:46:29,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:46:29,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:46:29,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-25 17:46:29,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:29,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408282435] [2022-11-25 17:46:29,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:46:29,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593571210] [2022-11-25 17:46:29,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593571210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:46:29,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:46:29,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-25 17:46:29,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717846530] [2022-11-25 17:46:29,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:29,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:46:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:46:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:46:29,903 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-25 17:46:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:30,256 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2022-11-25 17:46:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:46:30,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2022-11-25 17:46:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:30,264 INFO L225 Difference]: With dead ends: 126 [2022-11-25 17:46:30,265 INFO L226 Difference]: Without dead ends: 116 [2022-11-25 17:46:30,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:46:30,267 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 68 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:30,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 122 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:46:30,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-25 17:46:30,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2022-11-25 17:46:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 17:46:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-11-25 17:46:30,323 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 47 [2022-11-25 17:46:30,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:30,324 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-11-25 17:46:30,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-25 17:46:30,324 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-11-25 17:46:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-25 17:46:30,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:30,335 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:30,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:30,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:30,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:30,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:30,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 3 times [2022-11-25 17:46:30,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:30,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073446903] [2022-11-25 17:46:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:30,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:30,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:46:30,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525837797] [2022-11-25 17:46:30,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:46:30,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:30,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:30,559 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:46:30,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:46:54,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 17:46:54,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:54,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 17:46:54,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 19 proven. 73 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-25 17:46:54,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:54,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073446903] [2022-11-25 17:46:54,646 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:46:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525837797] [2022-11-25 17:46:54,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525837797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:46:54,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:46:54,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-25 17:46:54,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911306346] [2022-11-25 17:46:54,648 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:54,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:46:54,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:54,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:46:54,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:46:54,650 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:46:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:55,112 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-11-25 17:46:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:46:55,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 61 [2022-11-25 17:46:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:55,114 INFO L225 Difference]: With dead ends: 101 [2022-11-25 17:46:55,114 INFO L226 Difference]: Without dead ends: 95 [2022-11-25 17:46:55,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:46:55,115 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:55,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 215 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:46:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-25 17:46:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-11-25 17:46:55,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 72 states have internal predecessors, (74), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-25 17:46:55,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 103 transitions. [2022-11-25 17:46:55,168 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 103 transitions. Word has length 61 [2022-11-25 17:46:55,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:55,168 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 103 transitions. [2022-11-25 17:46:55,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:46:55,169 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 103 transitions. [2022-11-25 17:46:55,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-25 17:46:55,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:55,170 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:55,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:55,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:55,371 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1106405730, now seen corresponding path program 4 times [2022-11-25 17:46:55,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:55,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555185636] [2022-11-25 17:46:55,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:55,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:55,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:46:55,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040980206] [2022-11-25 17:46:55,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:46:55,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:55,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:55,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:46:55,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:46:55,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:46:55,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:46:55,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-25 17:46:55,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:46:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-25 17:46:55,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:46:56,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:46:56,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555185636] [2022-11-25 17:46:56,056 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:46:56,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040980206] [2022-11-25 17:46:56,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040980206] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:46:56,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:46:56,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-25 17:46:56,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583194135] [2022-11-25 17:46:56,057 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:46:56,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 17:46:56,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:46:56,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 17:46:56,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:46:56,059 INFO L87 Difference]: Start difference. First operand 95 states and 103 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:46:56,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:46:56,432 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2022-11-25 17:46:56,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:46:56,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 69 [2022-11-25 17:46:56,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:46:56,434 INFO L225 Difference]: With dead ends: 100 [2022-11-25 17:46:56,434 INFO L226 Difference]: Without dead ends: 94 [2022-11-25 17:46:56,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:46:56,435 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:46:56,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 285 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:46:56,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-25 17:46:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-25 17:46:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-25 17:46:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2022-11-25 17:46:56,476 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 69 [2022-11-25 17:46:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:46:56,476 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2022-11-25 17:46:56,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:46:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2022-11-25 17:46:56,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-25 17:46:56,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:46:56,480 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:46:56,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:46:56,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:56,686 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:46:56,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:46:56,687 INFO L85 PathProgramCache]: Analyzing trace with hash -317230276, now seen corresponding path program 5 times [2022-11-25 17:46:56,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:46:56,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622392175] [2022-11-25 17:46:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:46:56,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:46:56,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:46:56,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165597811] [2022-11-25 17:46:56,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:46:56,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:46:56,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:46:56,714 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:46:56,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:47:33,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-25 17:47:33,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:47:33,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-25 17:47:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:47:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 41 proven. 113 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-25 17:47:34,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:47:38,222 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-25 17:47:59,069 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 10)) 30) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51|))))) is different from true [2022-11-25 17:48:17,189 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 15) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| 10)) 30) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_28|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_51|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-11-25 17:48:21,210 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (< |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~k~0#1|) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-25 17:48:31,295 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-25 17:48:33,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:48:33,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622392175] [2022-11-25 17:48:33,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:48:33,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165597811] [2022-11-25 17:48:33,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165597811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:48:33,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:48:33,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-25 17:48:33,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716376919] [2022-11-25 17:48:33,329 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:48:33,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:48:33,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:48:33,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:48:33,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=242, Unknown=5, NotChecked=170, Total=462 [2022-11-25 17:48:33,331 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 17:48:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:48:33,872 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2022-11-25 17:48:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 17:48:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2022-11-25 17:48:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:48:33,874 INFO L225 Difference]: With dead ends: 99 [2022-11-25 17:48:33,875 INFO L226 Difference]: Without dead ends: 93 [2022-11-25 17:48:33,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=63, Invalid=332, Unknown=5, NotChecked=200, Total=600 [2022-11-25 17:48:33,876 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:48:33,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 305 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:48:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-25 17:48:33,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-25 17:48:33,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 17:48:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-11-25 17:48:33,901 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 77 [2022-11-25 17:48:33,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:48:33,902 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-11-25 17:48:33,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 17:48:33,902 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-11-25 17:48:33,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-25 17:48:33,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:48:33,904 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:48:33,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-25 17:48:34,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:48:34,115 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:48:34,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:48:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1298793238, now seen corresponding path program 6 times [2022-11-25 17:48:34,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:48:34,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044705266] [2022-11-25 17:48:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:48:34,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:48:34,136 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:48:34,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815492742] [2022-11-25 17:48:34,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 17:48:34,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:48:34,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:48:34,139 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:48:34,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 17:58:31,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-25 17:58:31,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:58:31,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-25 17:58:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:32,405 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 25 proven. 166 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-25 17:58:32,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:32,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:32,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044705266] [2022-11-25 17:58:32,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:58:32,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815492742] [2022-11-25 17:58:32,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815492742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:32,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:58:32,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-25 17:58:32,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221976706] [2022-11-25 17:58:32,678 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:32,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:58:32,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:32,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:58:32,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:58:32,680 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 17:58:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:58:33,259 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-11-25 17:58:33,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 17:58:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 85 [2022-11-25 17:58:33,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:58:33,261 INFO L225 Difference]: With dead ends: 98 [2022-11-25 17:58:33,261 INFO L226 Difference]: Without dead ends: 92 [2022-11-25 17:58:33,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:58:33,262 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:58:33,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 356 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 17:58:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-25 17:58:33,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-25 17:58:33,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 17:58:33,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-11-25 17:58:33,285 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 85 [2022-11-25 17:58:33,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:58:33,286 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-11-25 17:58:33,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 17:58:33,286 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-11-25 17:58:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 17:58:33,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:58:33,287 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:33,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:33,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:58:33,495 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:58:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1207691024, now seen corresponding path program 7 times [2022-11-25 17:58:33,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:33,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846498871] [2022-11-25 17:58:33,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:33,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:33,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:58:33,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727417816] [2022-11-25 17:58:33,510 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 17:58:33,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:33,512 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:33,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c32f4207-0c83-460f-9c33-cc15dddfe35a/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 17:59:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:59,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-25 17:59:59,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:59,702 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 51 proven. 181 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-25 17:59:59,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:00:03,793 WARN L837 $PredicateComparison]: unable to prove that (or (= (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~k~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| 29) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 30) 0))) is different from false [2022-11-25 18:00:23,876 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 15)) 30) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0))) is different from true [2022-11-25 18:00:40,651 WARN L233 SmtUtils]: Spent 6.73s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-25 18:00:44,667 WARN L859 $PredicateComparison]: unable to prove that (or (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_38|)) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 29) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_78| 15)) 30) 0))) (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0)) is different from true