./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ --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 e66935135411fbf96808f67125d08daf2aa12325c87064d554338ba4e7860b02 --- 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-dbf71c6-m [2022-10-17 10:24:32,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:24:32,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:24:32,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:24:32,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:24:32,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:24:32,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:24:32,067 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:24:32,069 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:24:32,071 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:24:32,072 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:24:32,074 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:24:32,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:24:32,076 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:24:32,077 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:24:32,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:24:32,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:24:32,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:24:32,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:24:32,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:24:32,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:24:32,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:24:32,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:24:32,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:24:32,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:24:32,097 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:24:32,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:24:32,099 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:24:32,099 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:24:32,100 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:24:32,101 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:24:32,102 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:24:32,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:24:32,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:24:32,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:24:32,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:24:32,106 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:24:32,107 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:24:32,107 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:24:32,108 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:24:32,109 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:24:32,110 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:24:32,136 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:24:32,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:24:32,137 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:24:32,137 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:24:32,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:24:32,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:24:32,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:24:32,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:24:32,139 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:24:32,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:24:32,140 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:24:32,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:24:32,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:24:32,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:24:32,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:24:32,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:24:32,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:24:32,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:24:32,142 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:24:32,142 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:24:32,142 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:24:32,142 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:24:32,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:24:32,143 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:24:32,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:24:32,143 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:24:32,143 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:24:32,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:24:32,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:24:32,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:24:32,144 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:24:32,145 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:24:32,145 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:24:32,145 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e66935135411fbf96808f67125d08daf2aa12325c87064d554338ba4e7860b02 [2022-10-17 10:24:32,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:24:32,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:24:32,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:24:32,488 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:24:32,488 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:24:32,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2022-10-17 10:24:32,563 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/data/888b433fb/337f190e6b084a1fb7e3137a438fbddc/FLAG4aafa5cc3 [2022-10-17 10:24:33,052 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:24:33,052 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2022-10-17 10:24:33,061 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/data/888b433fb/337f190e6b084a1fb7e3137a438fbddc/FLAG4aafa5cc3 [2022-10-17 10:24:33,397 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/data/888b433fb/337f190e6b084a1fb7e3137a438fbddc [2022-10-17 10:24:33,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:24:33,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:24:33,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:24:33,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:24:33,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:24:33,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15016c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33, skipping insertion in model container [2022-10-17 10:24:33,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:24:33,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:24:33,634 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2022-10-17 10:24:33,664 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:24:33,674 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:24:33,690 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2022-10-17 10:24:33,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:24:33,721 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:24:33,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33 WrapperNode [2022-10-17 10:24:33,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:24:33,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:24:33,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:24:33,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:24:33,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,760 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2022-10-17 10:24:33,761 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:24:33,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:24:33,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:24:33,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:24:33,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,784 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:24:33,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:24:33,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:24:33,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:24:33,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (1/1) ... [2022-10-17 10:24:33,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:24:33,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:33,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:24:33,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:24:33,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:24:33,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:24:33,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:24:33,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:24:33,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:24:33,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:24:33,936 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:24:33,938 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:24:34,106 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:24:34,130 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:24:34,130 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:24:34,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:24:34 BoogieIcfgContainer [2022-10-17 10:24:34,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:24:34,136 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:24:34,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:24:34,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:24:34,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:24:33" (1/3) ... [2022-10-17 10:24:34,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54818481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:24:34, skipping insertion in model container [2022-10-17 10:24:34,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:24:33" (2/3) ... [2022-10-17 10:24:34,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54818481 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:24:34, skipping insertion in model container [2022-10-17 10:24:34,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:24:34" (3/3) ... [2022-10-17 10:24:34,159 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound5.c [2022-10-17 10:24:34,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:24:34,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:24:34,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:24:34,252 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;@1b52b2ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:24:34,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:24:34,257 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) [2022-10-17 10:24:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 10:24:34,278 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:34,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:34,280 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:34,286 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2022-10-17 10:24:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:34,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675523456] [2022-10-17 10:24:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:34,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:34,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:34,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675523456] [2022-10-17 10:24:34,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:24:34,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950809061] [2022-10-17 10:24:34,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:34,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:34,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:34,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:24:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:34,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2022-10-17 10:24:34,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:34,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:24:34,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950809061] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:34,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:34,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:24:34,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246014357] [2022-10-17 10:24:34,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:34,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:24:34,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:34,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:24:34,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:24:34,677 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) [2022-10-17 10:24:34,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:34,705 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2022-10-17 10:24:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:24:34,707 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 [2022-10-17 10:24:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:34,726 INFO L225 Difference]: With dead ends: 37 [2022-10-17 10:24:34,726 INFO L226 Difference]: Without dead ends: 16 [2022-10-17 10:24:34,731 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 [2022-10-17 10:24:34,735 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 [2022-10-17 10:24:34,736 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] [2022-10-17 10:24:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-10-17 10:24:34,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-10-17 10:24:34,774 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) [2022-10-17 10:24:34,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-10-17 10:24:34,777 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-10-17 10:24:34,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:34,778 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-10-17 10:24:34,778 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) [2022-10-17 10:24:34,779 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-10-17 10:24:34,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:24:34,780 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:34,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:34,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:24:35,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-10-17 10:24:35,007 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:35,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:35,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2022-10-17 10:24:35,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:35,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465904827] [2022-10-17 10:24:35,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:35,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:35,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:35,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:35,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465904827] [2022-10-17 10:24:35,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-10-17 10:24:35,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703057515] [2022-10-17 10:24:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:35,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:35,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:35,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:35,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:24:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:35,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 10:24:35,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:35,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:24:35,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703057515] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:35,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:35,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 10:24:35,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416546319] [2022-10-17 10:24:35,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:35,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:24:35,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:35,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:24:35,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:24:35,221 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) [2022-10-17 10:24:35,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:35,258 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-10-17 10:24:35,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:24:35,260 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 [2022-10-17 10:24:35,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:35,262 INFO L225 Difference]: With dead ends: 26 [2022-10-17 10:24:35,269 INFO L226 Difference]: Without dead ends: 18 [2022-10-17 10:24:35,270 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 [2022-10-17 10:24:35,272 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 [2022-10-17 10:24:35,273 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] [2022-10-17 10:24:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-10-17 10:24:35,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-10-17 10:24:35,285 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) [2022-10-17 10:24:35,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-10-17 10:24:35,286 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2022-10-17 10:24:35,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:35,287 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-10-17 10:24:35,287 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) [2022-10-17 10:24:35,289 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-10-17 10:24:35,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 10:24:35,290 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:35,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:35,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:24:35,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:35,511 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2022-10-17 10:24:35,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:35,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365393797] [2022-10-17 10:24:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:35,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:35,533 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:24:35,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242472747] [2022-10-17 10:24:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:35,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:35,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:35,544 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:35,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:24:35,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:35,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2022-10-17 10:24:35,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:35,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:35,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:24:35,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:35,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365393797] [2022-10-17 10:24:35,710 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:24:35,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242472747] [2022-10-17 10:24:35,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242472747] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:24:35,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:24:35,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:24:35,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299207816] [2022-10-17 10:24:35,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:35,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:24:35,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:35,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:24:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:24:35,713 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-10-17 10:24:35,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:35,790 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2022-10-17 10:24:35,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:24:35,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2022-10-17 10:24:35,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:35,792 INFO L225 Difference]: With dead ends: 28 [2022-10-17 10:24:35,792 INFO L226 Difference]: Without dead ends: 24 [2022-10-17 10:24:35,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:24:35,795 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:35,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:35,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-10-17 10:24:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-10-17 10:24:35,803 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) [2022-10-17 10:24:35,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-10-17 10:24:35,805 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2022-10-17 10:24:35,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:35,805 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-10-17 10:24:35,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2022-10-17 10:24:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-10-17 10:24:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 10:24:35,807 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:35,807 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:35,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:24:36,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-10-17 10:24:36,021 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:36,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2022-10-17 10:24:36,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:36,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843343365] [2022-10-17 10:24:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:36,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:36,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:24:36,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2027425269] [2022-10-17 10:24:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:36,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:36,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:36,056 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:36,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:24:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:36,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:24:36,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:36,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:24:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:36,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:36,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843343365] [2022-10-17 10:24:36,305 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:24:36,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027425269] [2022-10-17 10:24:36,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027425269] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:24:36,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:24:36,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-10-17 10:24:36,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587259962] [2022-10-17 10:24:36,306 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:24:36,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:24:36,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:36,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:24:36,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:24:36,308 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) [2022-10-17 10:24:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:36,406 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-10-17 10:24:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:24:36,409 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 [2022-10-17 10:24:36,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:36,410 INFO L225 Difference]: With dead ends: 58 [2022-10-17 10:24:36,410 INFO L226 Difference]: Without dead ends: 50 [2022-10-17 10:24:36,411 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 [2022-10-17 10:24:36,412 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:36,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 82 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-17 10:24:36,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-10-17 10:24:36,427 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) [2022-10-17 10:24:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2022-10-17 10:24:36,430 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2022-10-17 10:24:36,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:36,433 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2022-10-17 10:24:36,433 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) [2022-10-17 10:24:36,434 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2022-10-17 10:24:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 10:24:36,436 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:36,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:36,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:24:36,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:36,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:36,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:36,651 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2022-10-17 10:24:36,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:36,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503431984] [2022-10-17 10:24:36,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:36,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:36,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:24:36,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120972431] [2022-10-17 10:24:36,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:36,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:36,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:36,687 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:36,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:24:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:36,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:24:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:24:36,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:24:37,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 10:24:37,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:37,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503431984] [2022-10-17 10:24:37,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:24:37,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120972431] [2022-10-17 10:24:37,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120972431] provided 1 perfect and 1 imperfect interpolant sequences [2022-10-17 10:24:37,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:24:37,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-10-17 10:24:37,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497644136] [2022-10-17 10:24:37,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:24:37,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:24:37,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:37,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:24:37,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:24:37,298 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) [2022-10-17 10:24:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:37,462 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-10-17 10:24:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:24:37,462 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 [2022-10-17 10:24:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:37,464 INFO L225 Difference]: With dead ends: 60 [2022-10-17 10:24:37,464 INFO L226 Difference]: Without dead ends: 52 [2022-10-17 10:24:37,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:24:37,467 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:37,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 41 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-10-17 10:24:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-10-17 10:24:37,494 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) [2022-10-17 10:24:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-10-17 10:24:37,496 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2022-10-17 10:24:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:37,497 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-10-17 10:24:37,497 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) [2022-10-17 10:24:37,497 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-10-17 10:24:37,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:24:37,499 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:37,499 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:37,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-10-17 10:24:37,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:37,704 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:37,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:37,705 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2022-10-17 10:24:37,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:37,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918475601] [2022-10-17 10:24:37,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:37,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:37,737 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:24:37,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966516599] [2022-10-17 10:24:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:37,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:37,758 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:37,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:24:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:24:37,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 10:24:37,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:24:37,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:24:38,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:38,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918475601] [2022-10-17 10:24:38,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:24:38,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966516599] [2022-10-17 10:24:38,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966516599] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:24:38,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:24:38,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-10-17 10:24:38,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807423524] [2022-10-17 10:24:38,270 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:24:38,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:24:38,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:38,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:24:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:24:38,273 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:24:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:38,427 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-10-17 10:24:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:24:38,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-10-17 10:24:38,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:38,431 INFO L225 Difference]: With dead ends: 51 [2022-10-17 10:24:38,432 INFO L226 Difference]: Without dead ends: 45 [2022-10-17 10:24:38,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:24:38,439 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:38,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 95 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-10-17 10:24:38,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-10-17 10:24:38,473 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) [2022-10-17 10:24:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-10-17 10:24:38,476 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2022-10-17 10:24:38,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:38,477 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-10-17 10:24:38,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:24:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-10-17 10:24:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:24:38,481 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:38,482 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:38,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 10:24:38,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:24:38,699 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:38,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:38,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2022-10-17 10:24:38,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:38,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826427333] [2022-10-17 10:24:38,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:38,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:38,715 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:24:38,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562753474] [2022-10-17 10:24:38,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:24:38,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:38,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:38,716 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:38,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:24:38,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:24:38,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:24:38,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:24:38,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:24:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:24:39,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:24:39,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:24:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826427333] [2022-10-17 10:24:39,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-10-17 10:24:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562753474] [2022-10-17 10:24:39,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562753474] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:24:39,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:24:39,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-10-17 10:24:39,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321852283] [2022-10-17 10:24:39,269 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-10-17 10:24:39,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:24:39,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:24:39,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:24:39,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:24:39,271 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:24:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:24:39,405 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-10-17 10:24:39,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:24:39,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-10-17 10:24:39,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:24:39,407 INFO L225 Difference]: With dead ends: 50 [2022-10-17 10:24:39,407 INFO L226 Difference]: Without dead ends: 44 [2022-10-17 10:24:39,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-10-17 10:24:39,415 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:24:39,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 125 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:24:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-10-17 10:24:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-10-17 10:24:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 10:24:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-10-17 10:24:39,446 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 37 [2022-10-17 10:24:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:24:39,447 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-10-17 10:24:39,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 10:24:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-10-17 10:24:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-10-17 10:24:39,451 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:24:39,451 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:24:39,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:24:39,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-10-17 10:24:39,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:24:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:24:39,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1183870932, now seen corresponding path program 3 times [2022-10-17 10:24:39,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:24:39,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285044118] [2022-10-17 10:24:39,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:24:39,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:24:39,668 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-10-17 10:24:39,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953042809] [2022-10-17 10:24:39,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 10:24:39,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:24:39,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:24:39,670 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:24:39,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0329ce1c-4674-4e77-984f-f4942508aef2/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process