./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:50:27,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:50:27,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:50:28,054 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:50:28,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:50:28,059 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:50:28,063 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:50:28,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:50:28,079 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:50:28,080 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:50:28,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:50:28,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:50:28,085 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:50:28,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:50:28,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:50:28,097 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:50:28,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:50:28,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:50:28,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:50:28,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:50:28,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:50:28,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:50:28,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:50:28,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:50:28,130 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:50:28,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:50:28,136 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:50:28,137 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:50:28,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:50:28,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:50:28,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:50:28,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:50:28,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:50:28,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:50:28,145 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:50:28,145 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:50:28,146 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:50:28,147 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:50:28,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:50:28,148 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:50:28,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:50:28,151 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:50:28,204 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:50:28,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:50:28,205 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:50:28,205 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:50:28,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:50:28,207 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:50:28,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:50:28,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:50:28,209 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:50:28,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:50:28,210 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:50:28,211 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:50:28,211 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:50:28,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:50:28,212 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:50:28,212 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:50:28,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:50:28,213 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:50:28,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:50:28,213 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:50:28,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:50:28,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:50:28,214 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:50:28,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:50:28,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:50:28,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:50:28,215 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:50:28,215 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:50:28,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:50:28,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:50:28,219 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:50:28,219 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:50:28,220 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:50:28,220 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_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 [2022-11-18 20:50:28,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:50:28,702 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:50:28,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:50:28,708 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:50:28,709 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:50:28,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2022-11-18 20:50:28,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/data/ac6d44a14/31b0a8d31ef44c5bad259a126e7554d0/FLAGa3dbf5a23 [2022-11-18 20:50:29,440 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:50:29,441 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2022-11-18 20:50:29,451 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/data/ac6d44a14/31b0a8d31ef44c5bad259a126e7554d0/FLAGa3dbf5a23 [2022-11-18 20:50:29,760 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/data/ac6d44a14/31b0a8d31ef44c5bad259a126e7554d0 [2022-11-18 20:50:29,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:50:29,766 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:50:29,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:50:29,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:50:29,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:50:29,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:50:29" (1/1) ... [2022-11-18 20:50:29,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2b66a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:29, skipping insertion in model container [2022-11-18 20:50:29,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:50:29" (1/1) ... [2022-11-18 20:50:29,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:50:29,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:50:30,040 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2022-11-18 20:50:30,072 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2022-11-18 20:50:30,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:50:30,086 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:50:30,105 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2022-11-18 20:50:30,119 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2022-11-18 20:50:30,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:50:30,139 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:50:30,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30 WrapperNode [2022-11-18 20:50:30,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:50:30,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:50:30,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:50:30,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:50:30,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,175 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,217 INFO L138 Inliner]: procedures = 27, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 85 [2022-11-18 20:50:30,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:50:30,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:50:30,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:50:30,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:50:30,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,266 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,269 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:50:30,289 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:50:30,289 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:50:30,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:50:30,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (1/1) ... [2022-11-18 20:50:30,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:50:30,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:30,342 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:50:30,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:50:30,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:50:30,411 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-18 20:50:30,411 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-18 20:50:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-18 20:50:30,414 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-18 20:50:30,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:50:30,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:50:30,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:50:30,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 20:50:30,415 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 20:50:30,528 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:50:30,535 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:50:30,871 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:50:30,888 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:50:30,888 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:50:30,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:30 BoogieIcfgContainer [2022-11-18 20:50:30,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:50:30,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:50:30,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:50:30,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:50:30,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:50:29" (1/3) ... [2022-11-18 20:50:30,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49698df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:50:30, skipping insertion in model container [2022-11-18 20:50:30,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:30" (2/3) ... [2022-11-18 20:50:30,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49698df8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:50:30, skipping insertion in model container [2022-11-18 20:50:30,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:30" (3/3) ... [2022-11-18 20:50:30,906 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_4.i [2022-11-18 20:50:30,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:50:30,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 20:50:31,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:50:31,027 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;@1982843e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:50:31,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 20:50:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:50:31,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:50:31,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:31,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:31,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:31,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:31,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-11-18 20:50:31,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:31,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116684959] [2022-11-18 20:50:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:31,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:31,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:31,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:31,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116684959] [2022-11-18 20:50:31,276 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:50:31,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051893551] [2022-11-18 20:50:31,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:31,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:31,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:31,284 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:31,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:50:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:50:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:31,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:31,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051893551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:31,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:31,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:50:31,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688169996] [2022-11-18 20:50:31,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:31,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:50:31,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:31,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:50:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:31,593 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:31,658 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2022-11-18 20:50:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:31,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2022-11-18 20:50:31,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:31,670 INFO L225 Difference]: With dead ends: 97 [2022-11-18 20:50:31,670 INFO L226 Difference]: Without dead ends: 45 [2022-11-18 20:50:31,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:31,678 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:31,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 100 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:50:31,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-18 20:50:31,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-11-18 20:50:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:50:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-11-18 20:50:31,723 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 11 [2022-11-18 20:50:31,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:31,724 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-11-18 20:50:31,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:31,724 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-11-18 20:50:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:50:31,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:31,726 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:31,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:50:31,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 20:50:31,932 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:31,933 INFO L85 PathProgramCache]: Analyzing trace with hash -5379846, now seen corresponding path program 1 times [2022-11-18 20:50:31,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:31,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399896681] [2022-11-18 20:50:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:31,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:31,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:31,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399896681] [2022-11-18 20:50:31,980 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:50:31,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900709262] [2022-11-18 20:50:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:31,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:31,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:31,982 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:31,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:50:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:32,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:50:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:32,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:32,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900709262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:32,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:32,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:50:32,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570104459] [2022-11-18 20:50:32,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:32,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:50:32,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:32,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:50:32,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:32,082 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:32,125 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-11-18 20:50:32,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:32,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2022-11-18 20:50:32,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:32,129 INFO L225 Difference]: With dead ends: 67 [2022-11-18 20:50:32,129 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 20:50:32,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:32,131 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:32,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 82 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:50:32,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 20:50:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-11-18 20:50:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:50:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-18 20:50:32,143 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 11 [2022-11-18 20:50:32,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:32,149 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-18 20:50:32,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-18 20:50:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:50:32,152 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:32,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:32,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:50:32,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:32,360 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:32,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:32,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-11-18 20:50:32,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:32,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634374433] [2022-11-18 20:50:32,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:32,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:32,380 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:50:32,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085348489] [2022-11-18 20:50:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:32,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:32,382 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:32,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:50:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:32,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:50:32,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:32,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:32,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:32,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634374433] [2022-11-18 20:50:32,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:50:32,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085348489] [2022-11-18 20:50:32,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085348489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:32,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:32,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:50:32,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682653342] [2022-11-18 20:50:32,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:32,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:50:32,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:32,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:50:32,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:32,600 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:32,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:32,646 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-18 20:50:32,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:32,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2022-11-18 20:50:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:32,650 INFO L225 Difference]: With dead ends: 56 [2022-11-18 20:50:32,654 INFO L226 Difference]: Without dead ends: 43 [2022-11-18 20:50:32,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:32,656 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:32,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:50:32,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-18 20:50:32,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-18 20:50:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:50:32,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-18 20:50:32,679 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-11-18 20:50:32,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:32,680 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-18 20:50:32,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:32,681 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-18 20:50:32,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:50:32,685 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:32,685 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:32,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:32,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-18 20:50:32,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-11-18 20:50:32,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:32,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391546374] [2022-11-18 20:50:32,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:32,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:32,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:50:32,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530803279] [2022-11-18 20:50:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:32,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:32,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:32,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:32,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:50:33,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:33,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:50:33,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:33,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:33,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:33,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391546374] [2022-11-18 20:50:33,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:50:33,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530803279] [2022-11-18 20:50:33,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530803279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:33,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:50:33,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-18 20:50:33,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265761114] [2022-11-18 20:50:33,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:33,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:50:33,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:33,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:50:33,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:50:33,243 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:33,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:33,316 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-18 20:50:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:50:33,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 17 [2022-11-18 20:50:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:33,318 INFO L225 Difference]: With dead ends: 60 [2022-11-18 20:50:33,318 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 20:50:33,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:50:33,322 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:33,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 152 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:50:33,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 20:50:33,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-18 20:50:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:50:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-18 20:50:33,338 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2022-11-18 20:50:33,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:33,338 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-18 20:50:33,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:33,339 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-18 20:50:33,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:50:33,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:33,340 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:33,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:33,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:33,541 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:33,541 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-11-18 20:50:33,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:33,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706198928] [2022-11-18 20:50:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:33,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:33,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:50:33,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132858804] [2022-11-18 20:50:33,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:50:33,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:33,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:33,564 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:33,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:50:33,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:50:33,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:50:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:33,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:33,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:34,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:34,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706198928] [2022-11-18 20:50:34,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:50:34,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132858804] [2022-11-18 20:50:34,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132858804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:34,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:50:34,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-18 20:50:34,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365990018] [2022-11-18 20:50:34,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:34,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:50:34,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:34,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:50:34,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:50:34,020 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:34,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:34,203 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-11-18 20:50:34,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:50:34,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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 21 [2022-11-18 20:50:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:34,205 INFO L225 Difference]: With dead ends: 68 [2022-11-18 20:50:34,206 INFO L226 Difference]: Without dead ends: 53 [2022-11-18 20:50:34,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:50:34,208 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:34,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 226 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-18 20:50:34,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-18 20:50:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:50:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-11-18 20:50:34,219 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2022-11-18 20:50:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:34,220 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-11-18 20:50:34,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-11-18 20:50:34,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 20:50:34,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:34,222 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:34,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:34,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:34,429 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2022-11-18 20:50:34,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:34,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327777306] [2022-11-18 20:50:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:34,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:50:34,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902798371] [2022-11-18 20:50:34,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:50:34,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:34,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:34,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:34,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:50:34,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:50:34,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:34,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:50:34,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:50:34,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-18 20:50:35,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:35,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327777306] [2022-11-18 20:50:35,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:50:35,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902798371] [2022-11-18 20:50:35,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902798371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:35,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:50:35,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-18 20:50:35,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063682534] [2022-11-18 20:50:35,370 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:35,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:50:35,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:50:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:50:35,372 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:36,218 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2022-11-18 20:50:36,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:50:36,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-18 20:50:36,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:36,220 INFO L225 Difference]: With dead ends: 81 [2022-11-18 20:50:36,220 INFO L226 Difference]: Without dead ends: 78 [2022-11-18 20:50:36,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:50:36,222 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:36,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 495 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:50:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-18 20:50:36,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 70. [2022-11-18 20:50:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 52 states have (on average 1.2307692307692308) internal successors, (64), 56 states have internal predecessors, (64), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 20:50:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2022-11-18 20:50:36,240 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 23 [2022-11-18 20:50:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:36,241 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2022-11-18 20:50:36,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2022-11-18 20:50:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:50:36,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:36,243 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:36,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:36,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-18 20:50:36,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2022-11-18 20:50:36,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:36,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082855248] [2022-11-18 20:50:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:36,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:36,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:50:36,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470865367] [2022-11-18 20:50:36,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:50:36,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:36,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:36,501 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:36,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:50:36,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:50:36,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:36,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:50:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:36,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:36,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:36,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082855248] [2022-11-18 20:50:36,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:50:36,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470865367] [2022-11-18 20:50:36,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470865367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:36,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:50:36,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-18 20:50:36,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160543886] [2022-11-18 20:50:36,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:36,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 20:50:36,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:36,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 20:50:36,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:50:36,962 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:37,221 INFO L93 Difference]: Finished difference Result 94 states and 117 transitions. [2022-11-18 20:50:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:50:37,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 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 25 [2022-11-18 20:50:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:37,224 INFO L225 Difference]: With dead ends: 94 [2022-11-18 20:50:37,224 INFO L226 Difference]: Without dead ends: 66 [2022-11-18 20:50:37,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:50:37,226 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 33 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:37,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 411 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-18 20:50:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-18 20:50:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 52 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 20:50:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-11-18 20:50:37,239 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 25 [2022-11-18 20:50:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:37,239 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-11-18 20:50:37,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-11-18 20:50:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 20:50:37,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:37,241 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:37,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:37,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:37,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:37,448 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2022-11-18 20:50:37,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:37,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015794019] [2022-11-18 20:50:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:37,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:37,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:50:37,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986424593] [2022-11-18 20:50:37,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:50:37,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:37,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:37,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:37,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:50:37,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 20:50:37,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:50:37,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:50:37,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:37,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:37,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:37,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015794019] [2022-11-18 20:50:37,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:50:37,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986424593] [2022-11-18 20:50:37,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986424593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:37,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:50:37,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-18 20:50:37,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958135520] [2022-11-18 20:50:37,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:37,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:50:37,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:37,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:50:37,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:50:37,949 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:38,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:38,074 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2022-11-18 20:50:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:50:38,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 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 27 [2022-11-18 20:50:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:38,076 INFO L225 Difference]: With dead ends: 76 [2022-11-18 20:50:38,076 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 20:50:38,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:50:38,078 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:38,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 354 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:38,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 20:50:38,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-18 20:50:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:50:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-11-18 20:50:38,108 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-11-18 20:50:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:38,109 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-11-18 20:50:38,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-11-18 20:50:38,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:50:38,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:38,114 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:38,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:38,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:38,316 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:38,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:38,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2022-11-18 20:50:38,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:38,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159490279] [2022-11-18 20:50:38,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:38,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:38,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:50:38,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238950495] [2022-11-18 20:50:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:38,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:38,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:38,358 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:50:38,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:50:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:38,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-18 20:50:38,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:38,678 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:50:38,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:50:39,114 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:50:39,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:39,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159490279] [2022-11-18 20:50:39,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:50:39,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238950495] [2022-11-18 20:50:39,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238950495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:50:39,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:50:39,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-18 20:50:39,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893873212] [2022-11-18 20:50:39,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:50:39,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:50:39,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:39,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:50:39,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:50:39,118 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:50:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:40,784 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-11-18 20:50:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:50:40,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-18 20:50:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:40,785 INFO L225 Difference]: With dead ends: 49 [2022-11-18 20:50:40,786 INFO L226 Difference]: Without dead ends: 23 [2022-11-18 20:50:40,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:50:40,787 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:40,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 419 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:50:40,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-18 20:50:40,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-18 20:50:40,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:50:40,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-18 20:50:40,792 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-11-18 20:50:40,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:40,792 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-18 20:50:40,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:50:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-18 20:50:40,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 20:50:40,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:40,794 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:40,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:40,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:50:40,995 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:40,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:40,996 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-11-18 20:50:40,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:40,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551505448] [2022-11-18 20:50:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:50:41,036 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:50:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:50:41,093 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:50:41,094 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:50:41,095 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-18 20:50:41,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 20:50:41,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:50:41,103 INFO L444 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1] [2022-11-18 20:50:41,108 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 20:50:41,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 08:50:41 BoogieIcfgContainer [2022-11-18 20:50:41,152 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 20:50:41,152 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 20:50:41,152 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 20:50:41,153 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 20:50:41,153 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:30" (3/4) ... [2022-11-18 20:50:41,162 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-18 20:50:41,162 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 20:50:41,162 INFO L158 Benchmark]: Toolchain (without parser) took 11396.80ms. Allocated memory was 134.2MB in the beginning and 169.9MB in the end (delta: 35.7MB). Free memory was 93.6MB in the beginning and 67.1MB in the end (delta: 26.5MB). Peak memory consumption was 62.1MB. Max. memory is 16.1GB. [2022-11-18 20:50:41,163 INFO L158 Benchmark]: CDTParser took 0.42ms. Allocated memory is still 134.2MB. Free memory was 110.8MB in the beginning and 110.7MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:50:41,163 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.24ms. Allocated memory is still 134.2MB. Free memory was 93.4MB in the beginning and 107.2MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-18 20:50:41,164 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.82ms. Allocated memory is still 134.2MB. Free memory was 107.2MB in the beginning and 105.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:50:41,164 INFO L158 Benchmark]: Boogie Preprocessor took 68.73ms. Allocated memory is still 134.2MB. Free memory was 105.8MB in the beginning and 104.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:50:41,165 INFO L158 Benchmark]: RCFGBuilder took 602.60ms. Allocated memory is still 134.2MB. Free memory was 104.3MB in the beginning and 92.0MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-18 20:50:41,165 INFO L158 Benchmark]: TraceAbstraction took 10258.07ms. Allocated memory was 134.2MB in the beginning and 169.9MB in the end (delta: 35.7MB). Free memory was 91.1MB in the beginning and 68.1MB in the end (delta: 22.9MB). Peak memory consumption was 60.3MB. Max. memory is 16.1GB. [2022-11-18 20:50:41,166 INFO L158 Benchmark]: Witness Printer took 9.56ms. Allocated memory is still 169.9MB. Free memory was 68.1MB in the beginning and 67.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:50:41,169 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.42ms. Allocated memory is still 134.2MB. Free memory was 110.8MB in the beginning and 110.7MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 369.24ms. Allocated memory is still 134.2MB. Free memory was 93.4MB in the beginning and 107.2MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.82ms. Allocated memory is still 134.2MB. Free memory was 107.2MB in the beginning and 105.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.73ms. Allocated memory is still 134.2MB. Free memory was 105.8MB in the beginning and 104.3MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 602.60ms. Allocated memory is still 134.2MB. Free memory was 104.3MB in the beginning and 92.0MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 10258.07ms. Allocated memory was 134.2MB in the beginning and 169.9MB in the end (delta: 35.7MB). Free memory was 91.1MB in the beginning and 68.1MB in the end (delta: 22.9MB). Peak memory consumption was 60.3MB. Max. memory is 16.1GB. * Witness Printer took 9.56ms. Allocated memory is still 169.9MB. Free memory was 68.1MB in the beginning and 67.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.8f && IN < 0.8f) [L100] CALL, EXPR f(IN) VAL [\old(x)=116] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=116, x=116] [L100] RET, EXPR f(IN) VAL [f(IN)=110, IN=116] [L100] CALL, EXPR fp(IN) VAL [\old(x)=116] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=116, x=116] [L100] RET, EXPR fp(IN) VAL [f(IN)=110, fp(IN)=109, IN=116] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=111] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=111, x=111] [L102] RET, EXPR f(x) VAL [f(x)=117, IN=116, x=111] [L102] CALL, EXPR fp(x) VAL [\old(x)=111] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=111, x=111] [L102] RET, EXPR fp(x) VAL [f(x)=117, fp(x)=112, IN=116, x=111] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=114] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=114, x=114] [L104] RET, EXPR f(x) VAL [f(x)=113, IN=116, x=114] [L104] CALL, EXPR fp(x) VAL [\old(x)=114] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=114, x=114] [L104] RET, EXPR fp(x) VAL [f(x)=113, fp(x)=115, IN=116, x=114] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=116] [L109] reach_error() VAL [IN=116] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 10.1s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 135 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 2317 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1948 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 903 IncrementalHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 369 mSDtfsCounter, 903 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 328 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=6, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 234 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 304 ConstructedInterpolants, 0 QuantifiedInterpolants, 1589 SizeOfPredicates, 41 NumberOfNonLiveVariables, 809 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 67/315 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-18 20:50:41,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:50:44,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:50:44,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:50:44,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:50:44,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:50:44,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:50:44,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:50:44,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:50:44,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:50:44,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:50:44,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:50:44,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:50:44,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:50:44,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:50:44,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:50:44,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:50:44,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:50:44,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:50:44,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:50:44,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:50:44,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:50:44,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:50:44,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:50:44,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:50:44,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:50:44,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:50:44,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:50:44,282 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:50:44,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:50:44,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:50:44,287 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:50:44,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:50:44,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:50:44,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:50:44,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:50:44,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:50:44,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:50:44,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:50:44,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:50:44,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:50:44,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:50:44,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-18 20:50:44,357 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:50:44,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:50:44,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:50:44,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:50:44,359 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:50:44,360 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:50:44,361 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:50:44,361 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:50:44,361 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:50:44,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:50:44,362 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:50:44,362 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:50:44,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:50:44,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:50:44,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:50:44,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:50:44,364 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:50:44,364 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-18 20:50:44,364 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-18 20:50:44,364 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:50:44,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:50:44,365 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:50:44,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:50:44,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:50:44,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:50:44,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:50:44,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:50:44,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:50:44,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:50:44,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:50:44,368 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-18 20:50:44,368 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-18 20:50:44,368 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:50:44,369 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:50:44,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:50:44,369 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-18 20:50:44,370 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f09b746b21098ae229b5e9917c4ca5a923788d2aece1e91f4b662939d14a19d3 [2022-11-18 20:50:44,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:50:44,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:50:44,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:50:44,926 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:50:44,927 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:50:44,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2022-11-18 20:50:45,001 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/data/910518e0e/9c822c23bbf248dc9b8f76fc020b8f7d/FLAGdf5ebd42f [2022-11-18 20:50:45,700 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:50:45,707 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i [2022-11-18 20:50:45,727 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/data/910518e0e/9c822c23bbf248dc9b8f76fc020b8f7d/FLAGdf5ebd42f [2022-11-18 20:50:46,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/data/910518e0e/9c822c23bbf248dc9b8f76fc020b8f7d [2022-11-18 20:50:46,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:50:46,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:50:46,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:50:46,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:50:46,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:50:46,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16fc749e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46, skipping insertion in model container [2022-11-18 20:50:46,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:50:46,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:50:46,265 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2022-11-18 20:50:46,295 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2022-11-18 20:50:46,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:50:46,314 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:50:46,363 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[1224,1237] [2022-11-18 20:50:46,377 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/sv-benchmarks/c/combinations/gcd_4+newton_3_4.i[2848,2861] [2022-11-18 20:50:46,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:50:46,420 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:50:46,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46 WrapperNode [2022-11-18 20:50:46,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:50:46,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:50:46,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:50:46,424 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:50:46,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,473 INFO L138 Inliner]: procedures = 28, calls = 28, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 82 [2022-11-18 20:50:46,474 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:50:46,475 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:50:46,475 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:50:46,475 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:50:46,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,503 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,511 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:50:46,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:50:46,518 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:50:46,518 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:50:46,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (1/1) ... [2022-11-18 20:50:46,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:50:46,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:46,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:50:46,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:50:46,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:50:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-18 20:50:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-18 20:50:46,622 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-18 20:50:46,622 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-18 20:50:46,623 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-18 20:50:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:50:46,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:50:46,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-18 20:50:46,623 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-18 20:50:46,727 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:50:46,730 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:50:58,105 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:50:58,114 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:50:58,115 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-18 20:50:58,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:58 BoogieIcfgContainer [2022-11-18 20:50:58,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:50:58,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:50:58,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:50:58,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:50:58,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:50:46" (1/3) ... [2022-11-18 20:50:58,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39630d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:50:58, skipping insertion in model container [2022-11-18 20:50:58,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:46" (2/3) ... [2022-11-18 20:50:58,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39630d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:50:58, skipping insertion in model container [2022-11-18 20:50:58,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:58" (3/3) ... [2022-11-18 20:50:58,129 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_4.i [2022-11-18 20:50:58,151 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:50:58,151 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 20:50:58,212 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:50:58,220 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;@782532d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:50:58,220 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 20:50:58,228 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:50:58,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:50:58,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:58,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:58,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:58,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:58,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-11-18 20:50:58,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:58,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257359003] [2022-11-18 20:50:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:58,272 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:58,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:58,273 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:50:58,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-18 20:50:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:58,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:50:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:58,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:58,637 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:58,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257359003] [2022-11-18 20:50:58,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257359003] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:58,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:58,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:50:58,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415114734] [2022-11-18 20:50:58,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:58,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:50:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:58,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:50:58,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:58,700 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:58,853 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-11-18 20:50:58,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:58,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 11 [2022-11-18 20:50:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:58,867 INFO L225 Difference]: With dead ends: 99 [2022-11-18 20:50:58,867 INFO L226 Difference]: Without dead ends: 46 [2022-11-18 20:50:58,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:58,876 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:58,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-18 20:50:58,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-11-18 20:50:58,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:50:58,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-18 20:50:58,942 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-11-18 20:50:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:58,943 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-18 20:50:58,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:58,945 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-18 20:50:58,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:50:58,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:58,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:58,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-11-18 20:50:59,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:59,165 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:59,167 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2022-11-18 20:50:59,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:59,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [469042453] [2022-11-18 20:50:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:59,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:59,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:59,175 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:50:59,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-18 20:50:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:59,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:50:59,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:50:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:59,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:50:59,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:50:59,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [469042453] [2022-11-18 20:50:59,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [469042453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:59,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:59,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:50:59,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589456953] [2022-11-18 20:50:59,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:59,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:50:59,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:50:59,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:50:59,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:59,371 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:50:59,468 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-11-18 20:50:59,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:50:59,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 13 [2022-11-18 20:50:59,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:50:59,472 INFO L225 Difference]: With dead ends: 55 [2022-11-18 20:50:59,472 INFO L226 Difference]: Without dead ends: 41 [2022-11-18 20:50:59,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:50:59,475 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:50:59,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:50:59,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-18 20:50:59,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-18 20:50:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:50:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-18 20:50:59,487 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2022-11-18 20:50:59,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:50:59,487 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-18 20:50:59,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-18 20:50:59,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:50:59,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:50:59,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:50:59,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:50:59,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:59,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:50:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:59,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-11-18 20:50:59,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:50:59,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048294395] [2022-11-18 20:50:59,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:59,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:50:59,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:50:59,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:50:59,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-18 20:50:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:59,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:50:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:00,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:51:00,156 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:00,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048294395] [2022-11-18 20:51:00,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048294395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:00,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:00,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:51:00,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556879524] [2022-11-18 20:51:00,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:00,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:51:00,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:00,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:51:00,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:51:00,159 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:00,264 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-18 20:51:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:51:00,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 15 [2022-11-18 20:51:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:00,266 INFO L225 Difference]: With dead ends: 56 [2022-11-18 20:51:00,267 INFO L226 Difference]: Without dead ends: 43 [2022-11-18 20:51:00,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:51:00,269 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:00,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:51:00,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-18 20:51:00,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-18 20:51:00,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:51:00,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-18 20:51:00,280 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-11-18 20:51:00,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:00,281 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-18 20:51:00,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,282 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-18 20:51:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:51:00,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:00,283 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:00,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:00,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:00,507 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:51:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:00,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-11-18 20:51:00,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:00,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [156423399] [2022-11-18 20:51:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:00,509 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:00,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:00,511 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:51:00,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-18 20:51:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:00,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:51:00,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:01,334 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:01,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:01,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [156423399] [2022-11-18 20:51:01,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [156423399] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:01,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:51:01,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-18 20:51:01,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089841197] [2022-11-18 20:51:01,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:01,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:51:01,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:51:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:51:01,339 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:51:01,582 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-18 20:51:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:51:01,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 17 [2022-11-18 20:51:01,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:51:01,591 INFO L225 Difference]: With dead ends: 60 [2022-11-18 20:51:01,594 INFO L226 Difference]: Without dead ends: 47 [2022-11-18 20:51:01,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:51:01,597 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:51:01,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:51:01,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-18 20:51:01,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-18 20:51:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-18 20:51:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-18 20:51:01,620 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2022-11-18 20:51:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:51:01,622 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-18 20:51:01,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-18 20:51:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:51:01,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:51:01,626 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:01,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:01,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:01,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:51:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:01,846 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-11-18 20:51:01,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:51:01,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493516605] [2022-11-18 20:51:01,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:51:01,847 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:51:01,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:51:01,852 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:51:01,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-18 20:51:01,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:51:01,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:01,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:51:01,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:03,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:51:03,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:12,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:51:12,507 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:51:12,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493516605] [2022-11-18 20:51:12,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493516605] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:12,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:51:12,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-18 20:51:12,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135410075] [2022-11-18 20:51:12,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:12,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:51:12,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:51:12,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:51:12,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:51:12,515 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:37,961 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:51:43,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-18 20:51:58,455 WARN L233 SmtUtils]: Spent 10.13s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:52:16,440 WARN L233 SmtUtils]: Spent 11.16s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:52:20,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:20,557 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2022-11-18 20:52:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:52:20,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-18 20:52:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:20,602 INFO L225 Difference]: With dead ends: 71 [2022-11-18 20:52:20,602 INFO L226 Difference]: Without dead ends: 68 [2022-11-18 20:52:20,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 66.5s TimeCoverageRelationStatistics Valid=118, Invalid=531, Unknown=1, NotChecked=0, Total=650 [2022-11-18 20:52:20,604 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:20,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 406 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2022-11-18 20:52:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-18 20:52:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-11-18 20:52:20,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 20:52:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-11-18 20:52:20,627 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2022-11-18 20:52:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:20,628 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-11-18 20:52:20,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-11-18 20:52:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-18 20:52:20,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:20,632 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:20,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:20,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:20,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:52:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash -311360839, now seen corresponding path program 3 times [2022-11-18 20:52:20,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:52:20,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682583600] [2022-11-18 20:52:20,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:52:20,851 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:20,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:52:20,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:52:20,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-18 20:52:20,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:52:20,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:52:20,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-18 20:52:20,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:21,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 20:52:21,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:52:21,031 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:52:21,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682583600] [2022-11-18 20:52:21,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682583600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:52:21,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:52:21,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:52:21,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319569934] [2022-11-18 20:52:21,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:52:21,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:52:21,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:52:21,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:52:21,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:52:21,034 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:21,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:21,130 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2022-11-18 20:52:21,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:52:21,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 23 [2022-11-18 20:52:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:21,135 INFO L225 Difference]: With dead ends: 78 [2022-11-18 20:52:21,136 INFO L226 Difference]: Without dead ends: 67 [2022-11-18 20:52:21,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:52:21,137 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:21,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:52:21,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-18 20:52:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-11-18 20:52:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-18 20:52:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-11-18 20:52:21,154 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 23 [2022-11-18 20:52:21,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:21,154 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-11-18 20:52:21,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-11-18 20:52:21,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:52:21,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:21,156 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:21,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:21,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:21,368 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:52:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:21,369 INFO L85 PathProgramCache]: Analyzing trace with hash 603968502, now seen corresponding path program 4 times [2022-11-18 20:52:21,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:52:21,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1070135925] [2022-11-18 20:52:21,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:52:21,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:21,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:52:21,372 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:52:21,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-18 20:52:21,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:52:21,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:52:21,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:52:21,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:52:22,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:52:22,968 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:52:22,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1070135925] [2022-11-18 20:52:22,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1070135925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:52:22,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:52:22,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-18 20:52:22,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086331148] [2022-11-18 20:52:22,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:52:22,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:52:22,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:52:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:52:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:52:22,971 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:24,109 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-11-18 20:52:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:52:24,122 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 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 25 [2022-11-18 20:52:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:24,123 INFO L225 Difference]: With dead ends: 88 [2022-11-18 20:52:24,123 INFO L226 Difference]: Without dead ends: 64 [2022-11-18 20:52:24,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:52:24,124 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:24,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 263 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:52:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-18 20:52:24,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-11-18 20:52:24,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:52:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-18 20:52:24,146 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 25 [2022-11-18 20:52:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:24,146 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-18 20:52:24,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-18 20:52:24,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-18 20:52:24,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:24,156 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:24,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:24,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:24,372 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:52:24,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:24,373 INFO L85 PathProgramCache]: Analyzing trace with hash 225362363, now seen corresponding path program 1 times [2022-11-18 20:52:24,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:52:24,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1271040780] [2022-11-18 20:52:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:52:24,373 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:24,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:52:24,374 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:52:24,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-18 20:52:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:52:24,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:52:24,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-18 20:52:25,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:52:26,069 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:52:26,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1271040780] [2022-11-18 20:52:26,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1271040780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:52:26,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:52:26,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-18 20:52:26,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032022001] [2022-11-18 20:52:26,070 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:52:26,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:52:26,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:52:26,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:52:26,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:52:26,071 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:52:26,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:26,932 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-11-18 20:52:26,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:52:26,933 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-18 20:52:26,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:26,934 INFO L225 Difference]: With dead ends: 74 [2022-11-18 20:52:26,934 INFO L226 Difference]: Without dead ends: 60 [2022-11-18 20:52:26,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:52:26,936 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 17 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:26,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 264 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 63 Invalid, 0 Unknown, 14 Unchecked, 0.5s Time] [2022-11-18 20:52:26,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-18 20:52:26,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-18 20:52:26,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 46 states have internal predecessors, (49), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-18 20:52:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-11-18 20:52:26,958 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 26 [2022-11-18 20:52:26,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:26,959 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-11-18 20:52:26,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-18 20:52:26,959 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-11-18 20:52:26,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-18 20:52:26,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:26,960 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:26,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:27,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:27,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:52:27,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:27,165 INFO L85 PathProgramCache]: Analyzing trace with hash -334589841, now seen corresponding path program 5 times [2022-11-18 20:52:27,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:52:27,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745452244] [2022-11-18 20:52:27,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:52:27,166 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:27,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:52:27,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:52:27,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-18 20:52:27,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 20:52:27,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:52:27,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:52:27,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:28,486 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:52:28,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:52:31,819 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:52:31,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745452244] [2022-11-18 20:52:31,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745452244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:52:31,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:52:31,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-11-18 20:52:31,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616162120] [2022-11-18 20:52:31,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:52:31,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:52:31,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:52:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:52:31,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:52:31,822 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:32,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:52:32,855 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-11-18 20:52:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:52:32,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 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 27 [2022-11-18 20:52:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:52:32,867 INFO L225 Difference]: With dead ends: 75 [2022-11-18 20:52:32,867 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 20:52:32,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:52:32,868 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:52:32,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 307 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:52:32,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 20:52:32,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-18 20:52:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-18 20:52:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-11-18 20:52:32,884 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-11-18 20:52:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:52:32,885 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-11-18 20:52:32,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:52:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-11-18 20:52:32,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:52:32,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:52:32,895 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:52:32,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:52:33,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:33,104 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:52:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:52:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 2 times [2022-11-18 20:52:33,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:52:33,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012094793] [2022-11-18 20:52:33,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:52:33,105 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:52:33,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:52:33,106 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:52:33,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-18 20:52:33,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:52:33,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:52:33,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-18 20:52:33,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:52:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:52:34,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:52:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:52:46,312 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-18 20:52:46,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012094793] [2022-11-18 20:52:46,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012094793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:52:46,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:52:46,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-18 20:52:46,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55195102] [2022-11-18 20:52:46,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:52:46,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:52:46,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-18 20:52:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:52:46,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:52:46,315 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:53:09,161 WARN L233 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 30 DAG size of output: 25 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:53:11,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:53:11,283 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-11-18 20:53:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:53:11,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-18 20:53:11,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:53:11,285 INFO L225 Difference]: With dead ends: 49 [2022-11-18 20:53:11,285 INFO L226 Difference]: Without dead ends: 23 [2022-11-18 20:53:11,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:53:11,287 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:53:11,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 389 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-18 20:53:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-18 20:53:11,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-18 20:53:11,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-18 20:53:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-18 20:53:11,292 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-11-18 20:53:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:53:11,292 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-18 20:53:11,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-18 20:53:11,293 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-18 20:53:11,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-18 20:53:11,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:53:11,294 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:53:11,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-11-18 20:53:11,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:11,512 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:53:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:53:11,513 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-11-18 20:53:11,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-18 20:53:11,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974059678] [2022-11-18 20:53:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:53:11,514 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-18 20:53:11,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat [2022-11-18 20:53:11,515 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-18 20:53:11,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a60400ea-b5bd-411e-836f-853957fad6d8/bin/uautomizer-TMbwUNV5ro/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process