./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:35:49,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:35:49,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:35:49,173 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:35:49,174 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:35:49,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:35:49,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:35:49,188 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:35:49,191 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:35:49,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:35:49,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:35:49,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:35:49,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:35:49,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:35:49,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:35:49,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:35:49,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:35:49,213 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:35:49,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:35:49,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:35:49,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:35:49,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:35:49,236 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:35:49,237 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:35:49,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:35:49,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:35:49,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:35:49,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:35:49,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:35:49,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:35:49,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:35:49,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:35:49,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:35:49,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:35:49,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:35:49,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:35:49,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:35:49,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:35:49,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:35:49,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:35:49,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:35:49,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-13 02:35:49,285 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:35:49,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:35:49,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:35:49,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:35:49,288 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:35:49,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:35:49,288 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:35:49,288 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 02:35:49,289 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:35:49,289 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:35:49,296 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 02:35:49,297 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 02:35:49,297 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:35:49,297 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 02:35:49,297 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 02:35:49,298 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 02:35:49,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:35:49,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 02:35:49,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:35:49,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:35:49,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:35:49,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:35:49,300 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:35:49,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:35:49,301 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:35:49,301 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:35:49,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:35:49,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:35:49,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:35:49,304 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:35:49,304 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:35:49,304 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:35:49,305 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 02:35:49,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 02:35:49,305 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:35:49,305 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:35:49,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:35:49,306 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 [2021-11-13 02:35:49,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:35:49,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:35:49,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:35:49,665 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:35:49,666 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:35:49,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-13 02:35:49,742 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/data/c9e678d83/5094f5bfaaa741db87ac291c5a0e1b7a/FLAG1fa2cf972 [2021-11-13 02:35:50,755 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:35:50,756 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-13 02:35:50,807 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/data/c9e678d83/5094f5bfaaa741db87ac291c5a0e1b7a/FLAG1fa2cf972 [2021-11-13 02:35:51,133 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/data/c9e678d83/5094f5bfaaa741db87ac291c5a0e1b7a [2021-11-13 02:35:51,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:35:51,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:35:51,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:35:51,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:35:51,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:35:51,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:51, skipping insertion in model container [2021-11-13 02:35:51,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:35:51" (1/1) ... [2021-11-13 02:35:51,158 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:35:51,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:35:52,628 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:52,735 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:52,743 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:52,912 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:52,918 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:52,967 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:52,981 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:52,988 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:53,001 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:53,006 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:53,007 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:53,138 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:53,144 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:53,152 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-13 02:35:53,186 WARN L228 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_90785a67-3396-478c-a5c4-7d3082b79cb2/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2021-11-13 02:35:53,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:35:53,332 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-13 02:35:53,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6b8327a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:53, skipping insertion in model container [2021-11-13 02:35:53,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:35:53,334 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-13 02:35:53,337 INFO L158 Benchmark]: Toolchain (without parser) took 2194.04ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 67.6MB in the beginning and 82.9MB in the end (delta: -15.4MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. [2021-11-13 02:35:53,338 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 111.1MB. Free memory is still 64.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 02:35:53,340 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2190.48ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 67.3MB in the beginning and 82.9MB in the end (delta: -15.6MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. [2021-11-13 02:35:53,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 111.1MB. Free memory is still 64.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2190.48ms. Allocated memory was 111.1MB in the beginning and 144.7MB in the end (delta: 33.6MB). Free memory was 67.3MB in the beginning and 82.9MB in the end (delta: -15.6MB). Peak memory consumption was 36.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6459]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. 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/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 02:35:55,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 02:35:55,595 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 02:35:55,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 02:35:55,655 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 02:35:55,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 02:35:55,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 02:35:55,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 02:35:55,671 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 02:35:55,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 02:35:55,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 02:35:55,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 02:35:55,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 02:35:55,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 02:35:55,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 02:35:55,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 02:35:55,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 02:35:55,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 02:35:55,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 02:35:55,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 02:35:55,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 02:35:55,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 02:35:55,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 02:35:55,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 02:35:55,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 02:35:55,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 02:35:55,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 02:35:55,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 02:35:55,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 02:35:55,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 02:35:55,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 02:35:55,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 02:35:55,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 02:35:55,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 02:35:55,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 02:35:55,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 02:35:55,737 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 02:35:55,738 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 02:35:55,738 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 02:35:55,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 02:35:55,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 02:35:55,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-13 02:35:55,771 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 02:35:55,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 02:35:55,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 02:35:55,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 02:35:55,775 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 02:35:55,775 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 02:35:55,776 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 02:35:55,776 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 02:35:55,776 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 02:35:55,776 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 02:35:55,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 02:35:55,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 02:35:55,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 02:35:55,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 02:35:55,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 02:35:55,780 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 02:35:55,780 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 02:35:55,780 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 02:35:55,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 02:35:55,781 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 02:35:55,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 02:35:55,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 02:35:55,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 02:35:55,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 02:35:55,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:35:55,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 02:35:55,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 02:35:55,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 02:35:55,783 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 02:35:55,783 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 02:35:55,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 02:35:55,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 02:35:55,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 02:35:55,784 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_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 [2021-11-13 02:35:56,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 02:35:56,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 02:35:56,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 02:35:56,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 02:35:56,238 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 02:35:56,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-13 02:35:56,321 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/data/475250bdb/318c2fba9eff4e02b409bf12bdf02e66/FLAG8c9a1ca0b [2021-11-13 02:35:57,412 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 02:35:57,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-13 02:35:57,473 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/data/475250bdb/318c2fba9eff4e02b409bf12bdf02e66/FLAG8c9a1ca0b [2021-11-13 02:35:57,804 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/data/475250bdb/318c2fba9eff4e02b409bf12bdf02e66 [2021-11-13 02:35:57,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 02:35:57,808 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 02:35:57,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 02:35:57,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 02:35:57,814 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 02:35:57,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:35:57" (1/1) ... [2021-11-13 02:35:57,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7527ce85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:35:57, skipping insertion in model container [2021-11-13 02:35:57,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 02:35:57" (1/1) ... [2021-11-13 02:35:57,823 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 02:35:57,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:35:59,952 WARN L228 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_90785a67-3396-478c-a5c4-7d3082b79cb2/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2021-11-13 02:36:00,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:36:00,081 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-13 02:36:00,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 02:36:00,487 WARN L228 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_90785a67-3396-478c-a5c4-7d3082b79cb2/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2021-11-13 02:36:00,506 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:36:00,523 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 02:36:00,912 WARN L228 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_90785a67-3396-478c-a5c4-7d3082b79cb2/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2021-11-13 02:36:00,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 02:36:00,999 INFO L208 MainTranslator]: Completed translation [2021-11-13 02:36:01,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01 WrapperNode [2021-11-13 02:36:01,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 02:36:01,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 02:36:01,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 02:36:01,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 02:36:01,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (1/1) ... [2021-11-13 02:36:01,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (1/1) ... [2021-11-13 02:36:01,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 02:36:01,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 02:36:01,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 02:36:01,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 02:36:01,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (1/1) ... [2021-11-13 02:36:01,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (1/1) ... [2021-11-13 02:36:01,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (1/1) ... [2021-11-13 02:36:01,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (1/1) ... [2021-11-13 02:36:01,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (1/1) ... [2021-11-13 02:36:01,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (1/1) ... [2021-11-13 02:36:01,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (1/1) ... [2021-11-13 02:36:01,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 02:36:01,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 02:36:01,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 02:36:01,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 02:36:01,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (1/1) ... [2021-11-13 02:36:01,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 02:36:01,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 02:36:01,564 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 02:36:01,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 02:36:01,614 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-13 02:36:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-13 02:36:01,614 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_free_iso_urbs [2021-11-13 02:36:01,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_free_iso_urbs [2021-11-13 02:36:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 02:36:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-13 02:36:01,615 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-13 02:36:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 02:36:01,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 02:36:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 02:36:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 02:36:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 02:36:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2021-11-13 02:36:01,616 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2021-11-13 02:36:01,616 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_unregister_adapter [2021-11-13 02:36:01,617 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_unregister_adapter [2021-11-13 02:36:01,617 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 02:36:01,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 02:36:01,617 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2021-11-13 02:36:01,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2021-11-13 02:36:01,618 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_iso_xfer [2021-11-13 02:36:01,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_iso_xfer [2021-11-13 02:36:01,618 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 02:36:01,618 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 02:36:01,618 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 02:36:01,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 02:36:01,619 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2021-11-13 02:36:01,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2021-11-13 02:36:01,619 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmx_release [2021-11-13 02:36:01,619 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmx_release [2021-11-13 02:36:01,619 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 02:36:01,620 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 02:36:01,620 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 02:36:01,620 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2021-11-13 02:36:01,620 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2021-11-13 02:36:01,621 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-13 02:36:01,621 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-13 02:36:01,621 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 02:36:01,621 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-13 02:36:01,622 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-13 02:36:01,622 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-11-13 02:36:01,622 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-11-13 02:36:01,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 02:36:01,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 02:36:01,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 02:36:01,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 02:36:01,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 02:36:01,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 02:36:01,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 02:36:01,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 02:36:01,624 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-13 02:36:01,625 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-13 02:36:01,625 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-13 02:36:01,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-13 02:36:01,626 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 02:36:01,626 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 02:36:01,627 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 02:36:01,627 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 02:36:01,627 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-13 02:36:01,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-13 02:36:01,628 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-13 02:36:01,628 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-13 02:36:01,628 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-13 02:36:01,629 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-13 02:36:01,629 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_model [2021-11-13 02:36:01,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_model [2021-11-13 02:36:01,629 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2021-11-13 02:36:01,629 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2021-11-13 02:36:01,630 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2021-11-13 02:36:01,630 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2021-11-13 02:36:01,631 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_stop_iso_xfer [2021-11-13 02:36:01,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_stop_iso_xfer [2021-11-13 02:36:01,631 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-13 02:36:01,631 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-13 02:36:01,631 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_filter_pes2ts_init [2021-11-13 02:36:01,631 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_filter_pes2ts_init [2021-11-13 02:36:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-13 02:36:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-13 02:36:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-13 02:36:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-13 02:36:01,632 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~C_ULONG~X~$Pointer$~X~C_ULONG~X~$Pointer$~X~C_INT~TO~C_INT [2021-11-13 02:36:01,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~C_ULONG~X~$Pointer$~X~C_ULONG~X~$Pointer$~X~C_INT~TO~C_INT [2021-11-13 02:36:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-11-13 02:36:01,633 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-11-13 02:36:01,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 02:36:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 02:36:01,634 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 02:36:01,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 02:36:01,634 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 02:36:01,635 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 02:36:01,635 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 02:36:01,636 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 02:36:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-11-13 02:36:01,636 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-11-13 02:36:01,636 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_send_command [2021-11-13 02:36:01,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_send_command [2021-11-13 02:36:01,637 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_setup_urbs [2021-11-13 02:36:01,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_setup_urbs [2021-11-13 02:36:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2021-11-13 02:36:01,638 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2021-11-13 02:36:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-13 02:36:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-13 02:36:01,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-13 02:36:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-13 02:36:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-13 02:36:01,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-13 02:36:01,639 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 02:36:01,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 02:36:01,640 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_pids [2021-11-13 02:36:01,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_pids [2021-11-13 02:36:01,640 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_exit_usb [2021-11-13 02:36:01,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_exit_usb [2021-11-13 02:36:01,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 02:36:01,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 02:36:01,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-13 02:36:01,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-13 02:36:01,644 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2021-11-13 02:36:01,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2021-11-13 02:36:01,645 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 02:36:01,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 02:36:01,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-13 02:36:01,647 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-13 02:36:01,648 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-13 02:36:01,653 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmxdev_release [2021-11-13 02:36:01,654 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmxdev_release [2021-11-13 02:36:01,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-13 02:36:01,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 02:36:01,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 02:36:37,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 02:36:37,154 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 02:36:37,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:36:37 BoogieIcfgContainer [2021-11-13 02:36:37,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 02:36:37,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 02:36:37,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 02:36:37,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 02:36:37,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 02:35:57" (1/3) ... [2021-11-13 02:36:37,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765332f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:36:37, skipping insertion in model container [2021-11-13 02:36:37,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 02:36:01" (2/3) ... [2021-11-13 02:36:37,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765332f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 02:36:37, skipping insertion in model container [2021-11-13 02:36:37,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 02:36:37" (3/3) ... [2021-11-13 02:36:37,167 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2021-11-13 02:36:37,172 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 02:36:37,173 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 02:36:37,229 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 02:36:37,237 INFO L339 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=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 02:36:37,237 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 02:36:37,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 952 states, 696 states have (on average 1.3261494252873562) internal successors, (923), 716 states have internal predecessors, (923), 204 states have call successors, (204), 50 states have call predecessors, (204), 50 states have return successors, (204), 198 states have call predecessors, (204), 204 states have call successors, (204) [2021-11-13 02:36:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 02:36:37,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:37,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:37,282 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:37,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1755858725, now seen corresponding path program 1 times [2021-11-13 02:36:37,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:37,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [503119512] [2021-11-13 02:36:37,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:37,305 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:37,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:37,313 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:37,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 02:36:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:36:39,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:39,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:39,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:39,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:39,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [503119512] [2021-11-13 02:36:39,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [503119512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:39,978 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:39,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:36:39,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3731721] [2021-11-13 02:36:39,982 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:39,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:36:39,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:40,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:36:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:36:40,021 INFO L87 Difference]: Start difference. First operand has 952 states, 696 states have (on average 1.3261494252873562) internal successors, (923), 716 states have internal predecessors, (923), 204 states have call successors, (204), 50 states have call predecessors, (204), 50 states have return successors, (204), 198 states have call predecessors, (204), 204 states have call successors, (204) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:42,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:42,584 INFO L93 Difference]: Finished difference Result 2823 states and 4045 transitions. [2021-11-13 02:36:42,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:36:42,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-13 02:36:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:42,622 INFO L225 Difference]: With dead ends: 2823 [2021-11-13 02:36:42,622 INFO L226 Difference]: Without dead ends: 1868 [2021-11-13 02:36:42,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:36:42,649 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1313 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2214.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1313 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.71ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2259.76ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:42,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1313 Valid, 2879 Invalid, 14 Unknown, 0 Unchecked, 30.71ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2259.76ms Time] [2021-11-13 02:36:42,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1868 states. [2021-11-13 02:36:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1868 to 1863. [2021-11-13 02:36:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1368 states have (on average 1.3216374269005848) internal successors, (1808), 1399 states have internal predecessors, (1808), 397 states have call successors, (397), 99 states have call predecessors, (397), 97 states have return successors, (398), 374 states have call predecessors, (398), 386 states have call successors, (398) [2021-11-13 02:36:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 2603 transitions. [2021-11-13 02:36:42,883 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 2603 transitions. Word has length 9 [2021-11-13 02:36:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:42,883 INFO L470 AbstractCegarLoop]: Abstraction has 1863 states and 2603 transitions. [2021-11-13 02:36:42,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 2603 transitions. [2021-11-13 02:36:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 02:36:42,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:42,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:42,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:43,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:43,098 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:43,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:43,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1403360505, now seen corresponding path program 1 times [2021-11-13 02:36:43,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:43,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1943510773] [2021-11-13 02:36:43,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:43,103 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:43,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:43,106 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:43,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 02:36:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:45,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 799 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:36:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:45,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:45,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:45,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1943510773] [2021-11-13 02:36:45,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1943510773] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:45,704 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:45,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:36:45,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417948782] [2021-11-13 02:36:45,705 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:45,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:36:45,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:45,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:36:45,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:36:45,707 INFO L87 Difference]: Start difference. First operand 1863 states and 2603 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:47,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:48,021 INFO L93 Difference]: Finished difference Result 1865 states and 2604 transitions. [2021-11-13 02:36:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:36:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-13 02:36:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:48,037 INFO L225 Difference]: With dead ends: 1865 [2021-11-13 02:36:48,037 INFO L226 Difference]: Without dead ends: 1862 [2021-11-13 02:36:48,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:36:48,040 INFO L933 BasicCegarLoop]: 1311 mSDtfsCounter, 1305 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2172.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1305 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2220.56ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:48,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1305 Valid, 1311 Invalid, 2 Unknown, 0 Unchecked, 7.61ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2220.56ms Time] [2021-11-13 02:36:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-11-13 02:36:48,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1862. [2021-11-13 02:36:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1368 states have (on average 1.320906432748538) internal successors, (1807), 1398 states have internal predecessors, (1807), 396 states have call successors, (396), 99 states have call predecessors, (396), 97 states have return successors, (398), 374 states have call predecessors, (398), 386 states have call successors, (398) [2021-11-13 02:36:48,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2601 transitions. [2021-11-13 02:36:48,164 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2601 transitions. Word has length 10 [2021-11-13 02:36:48,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:48,165 INFO L470 AbstractCegarLoop]: Abstraction has 1862 states and 2601 transitions. [2021-11-13 02:36:48,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:36:48,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2601 transitions. [2021-11-13 02:36:48,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-13 02:36:48,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:48,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:48,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:48,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:48,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:48,392 INFO L85 PathProgramCache]: Analyzing trace with hash -554903960, now seen corresponding path program 1 times [2021-11-13 02:36:48,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:48,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1019462433] [2021-11-13 02:36:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:48,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:48,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:48,396 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:48,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 02:36:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:50,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:36:50,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:50,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:50,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:50,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1019462433] [2021-11-13 02:36:50,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1019462433] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:50,777 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:50,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:36:50,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692576559] [2021-11-13 02:36:50,778 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:50,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:36:50,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:50,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:36:50,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:36:50,780 INFO L87 Difference]: Start difference. First operand 1862 states and 2601 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) [2021-11-13 02:36:52,894 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:53,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:53,031 INFO L93 Difference]: Finished difference Result 1864 states and 2602 transitions. [2021-11-13 02:36:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:36:53,032 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 [2021-11-13 02:36:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:53,046 INFO L225 Difference]: With dead ends: 1864 [2021-11-13 02:36:53,047 INFO L226 Difference]: Without dead ends: 1861 [2021-11-13 02:36:53,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:36:53,055 INFO L933 BasicCegarLoop]: 1309 mSDtfsCounter, 1302 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2119.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2161.57ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:53,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 1309 Invalid, 2 Unknown, 0 Unchecked, 5.83ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2161.57ms Time] [2021-11-13 02:36:53,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1861 states. [2021-11-13 02:36:53,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1861 to 1861. [2021-11-13 02:36:53,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1368 states have (on average 1.3201754385964912) internal successors, (1806), 1397 states have internal predecessors, (1806), 395 states have call successors, (395), 99 states have call predecessors, (395), 97 states have return successors, (398), 374 states have call predecessors, (398), 386 states have call successors, (398) [2021-11-13 02:36:53,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2599 transitions. [2021-11-13 02:36:53,183 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2599 transitions. Word has length 11 [2021-11-13 02:36:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:53,183 INFO L470 AbstractCegarLoop]: Abstraction has 1861 states and 2599 transitions. [2021-11-13 02:36:53,183 INFO L471 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) [2021-11-13 02:36:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2599 transitions. [2021-11-13 02:36:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 02:36:53,184 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:53,184 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:53,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:53,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:53,407 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:53,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash -22549974, now seen corresponding path program 1 times [2021-11-13 02:36:53,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:53,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1996521050] [2021-11-13 02:36:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:53,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:53,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:53,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:53,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 02:36:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:36:55,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:36:55,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:36:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:55,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:36:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 02:36:55,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:36:55,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1996521050] [2021-11-13 02:36:55,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1996521050] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:36:55,789 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:36:55,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:36:55,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324449684] [2021-11-13 02:36:55,790 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:36:55,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:36:55,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:36:55,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:36:55,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:36:55,792 INFO L87 Difference]: Start difference. First operand 1861 states and 2599 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-13 02:36:57,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:36:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:36:58,296 INFO L93 Difference]: Finished difference Result 5538 states and 7845 transitions. [2021-11-13 02:36:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:36:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2021-11-13 02:36:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:36:58,330 INFO L225 Difference]: With dead ends: 5538 [2021-11-13 02:36:58,330 INFO L226 Difference]: Without dead ends: 3675 [2021-11-13 02:36:58,342 INFO L932 BasicCegarLoop]: 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 [2021-11-13 02:36:58,343 INFO L933 BasicCegarLoop]: 1609 mSDtfsCounter, 1307 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2169.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 2898 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.01ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2220.68ms IncrementalHoareTripleChecker+Time [2021-11-13 02:36:58,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1307 Valid, 2898 Invalid, 12 Unknown, 0 Unchecked, 13.01ms Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2220.68ms Time] [2021-11-13 02:36:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2021-11-13 02:36:58,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 3655. [2021-11-13 02:36:58,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3655 states, 2697 states have (on average 1.32146829810901) internal successors, (3564), 2751 states have internal predecessors, (3564), 766 states have call successors, (766), 194 states have call predecessors, (766), 191 states have return successors, (830), 729 states have call predecessors, (830), 754 states have call successors, (830) [2021-11-13 02:36:58,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3655 states to 3655 states and 5160 transitions. [2021-11-13 02:36:58,597 INFO L78 Accepts]: Start accepts. Automaton has 3655 states and 5160 transitions. Word has length 12 [2021-11-13 02:36:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:36:58,597 INFO L470 AbstractCegarLoop]: Abstraction has 3655 states and 5160 transitions. [2021-11-13 02:36:58,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-11-13 02:36:58,598 INFO L276 IsEmpty]: Start isEmpty. Operand 3655 states and 5160 transitions. [2021-11-13 02:36:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 02:36:58,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:36:58,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:36:58,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 02:36:58,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:36:58,831 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:36:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:36:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1035086403, now seen corresponding path program 1 times [2021-11-13 02:36:58,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:36:58,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876505969] [2021-11-13 02:36:58,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:36:58,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:36:58,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:36:58,835 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:36:58,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 02:37:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:01,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:01,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:37:02,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:37:03,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:03,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876505969] [2021-11-13 02:37:03,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876505969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:03,525 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:03,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:37:03,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228920783] [2021-11-13 02:37:03,526 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:03,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:03,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:03,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:03,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:03,529 INFO L87 Difference]: Start difference. First operand 3655 states and 5160 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 02:37:04,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:04,204 INFO L93 Difference]: Finished difference Result 7379 states and 10435 transitions. [2021-11-13 02:37:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:37:04,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 134 [2021-11-13 02:37:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:04,236 INFO L225 Difference]: With dead ends: 7379 [2021-11-13 02:37:04,236 INFO L226 Difference]: Without dead ends: 3727 [2021-11-13 02:37:04,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:04,255 INFO L933 BasicCegarLoop]: 1305 mSDtfsCounter, 712 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 347.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.11ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 421.82ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:04,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [796 Valid, 2185 Invalid, 106 Unknown, 0 Unchecked, 9.11ms Time], IncrementalHoareTripleChecker [92 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 421.82ms Time] [2021-11-13 02:37:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-11-13 02:37:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3727. [2021-11-13 02:37:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3727 states, 2769 states have (on average 1.3253882267966774) internal successors, (3670), 2823 states have internal predecessors, (3670), 766 states have call successors, (766), 194 states have call predecessors, (766), 191 states have return successors, (830), 729 states have call predecessors, (830), 754 states have call successors, (830) [2021-11-13 02:37:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3727 states to 3727 states and 5266 transitions. [2021-11-13 02:37:04,505 INFO L78 Accepts]: Start accepts. Automaton has 3727 states and 5266 transitions. Word has length 134 [2021-11-13 02:37:04,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:04,505 INFO L470 AbstractCegarLoop]: Abstraction has 3727 states and 5266 transitions. [2021-11-13 02:37:04,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 02:37:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3727 states and 5266 transitions. [2021-11-13 02:37:04,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 02:37:04,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:04,510 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:04,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:04,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:04,727 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1548184114, now seen corresponding path program 1 times [2021-11-13 02:37:04,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:04,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787752855] [2021-11-13 02:37:04,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:04,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:04,731 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:04,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 02:37:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:07,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:07,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:09,254 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 02:37:09,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 02:37:10,256 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:10,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787752855] [2021-11-13 02:37:10,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787752855] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:10,256 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:10,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 02:37:10,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256596484] [2021-11-13 02:37:10,257 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:10,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:37:10,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:10,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:37:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:37:10,259 INFO L87 Difference]: Start difference. First operand 3727 states and 5266 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-13 02:37:12,368 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:37:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:13,631 INFO L93 Difference]: Finished difference Result 11155 states and 16180 transitions. [2021-11-13 02:37:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 134 [2021-11-13 02:37:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:13,697 INFO L225 Difference]: With dead ends: 11155 [2021-11-13 02:37:13,697 INFO L226 Difference]: Without dead ends: 7431 [2021-11-13 02:37:13,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:37:13,737 INFO L933 BasicCegarLoop]: 1483 mSDtfsCounter, 1216 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 82 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2960.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1216 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.20ms SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3040.98ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:13,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1216 Valid, 2701 Invalid, 167 Unknown, 0 Unchecked, 10.20ms Time], IncrementalHoareTripleChecker [82 Valid, 84 Invalid, 1 Unknown, 0 Unchecked, 3040.98ms Time] [2021-11-13 02:37:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7431 states. [2021-11-13 02:37:14,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 7400. [2021-11-13 02:37:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7400 states, 5497 states have (on average 1.2956157904311443) internal successors, (7122), 5597 states have internal predecessors, (7122), 1520 states have call successors, (1520), 385 states have call predecessors, (1520), 382 states have return successors, (1828), 1457 states have call predecessors, (1828), 1508 states have call successors, (1828) [2021-11-13 02:37:14,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7400 states to 7400 states and 10470 transitions. [2021-11-13 02:37:14,272 INFO L78 Accepts]: Start accepts. Automaton has 7400 states and 10470 transitions. Word has length 134 [2021-11-13 02:37:14,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:14,273 INFO L470 AbstractCegarLoop]: Abstraction has 7400 states and 10470 transitions. [2021-11-13 02:37:14,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-13 02:37:14,274 INFO L276 IsEmpty]: Start isEmpty. Operand 7400 states and 10470 transitions. [2021-11-13 02:37:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 02:37:14,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:14,282 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:14,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:14,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:14,503 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:14,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:14,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1103091386, now seen corresponding path program 1 times [2021-11-13 02:37:14,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:14,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1398021770] [2021-11-13 02:37:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:14,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:14,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:14,506 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:14,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 02:37:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:16,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 1284 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 02:37:16,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:19,372 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 02:37:19,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:37:24,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:24,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1398021770] [2021-11-13 02:37:24,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1398021770] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 02:37:24,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 02:37:24,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-13 02:37:24,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528374615] [2021-11-13 02:37:24,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:24,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:37:24,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:24,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:37:24,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-13 02:37:24,647 INFO L87 Difference]: Start difference. First operand 7400 states and 10470 transitions. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 7 states have internal predecessors, (84), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 02:37:26,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:26,814 INFO L93 Difference]: Finished difference Result 16520 states and 23741 transitions. [2021-11-13 02:37:26,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 02:37:26,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 7 states have internal predecessors, (84), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) Word has length 134 [2021-11-13 02:37:26,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:26,902 INFO L225 Difference]: With dead ends: 16520 [2021-11-13 02:37:26,902 INFO L226 Difference]: Without dead ends: 9123 [2021-11-13 02:37:26,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-13 02:37:26,947 INFO L933 BasicCegarLoop]: 1499 mSDtfsCounter, 208 mSDsluCounter, 11804 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1335.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 13303 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.45ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1388.67ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:26,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 13303 Invalid, 69 Unknown, 0 Unchecked, 26.45ms Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 1388.67ms Time] [2021-11-13 02:37:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9123 states. [2021-11-13 02:37:27,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9123 to 7488. [2021-11-13 02:37:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7488 states, 5561 states have (on average 1.292213630641971) internal successors, (7186), 5661 states have internal predecessors, (7186), 1520 states have call successors, (1520), 385 states have call predecessors, (1520), 406 states have return successors, (1932), 1481 states have call predecessors, (1932), 1508 states have call successors, (1932) [2021-11-13 02:37:27,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 10638 transitions. [2021-11-13 02:37:27,559 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 10638 transitions. Word has length 134 [2021-11-13 02:37:27,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:27,560 INFO L470 AbstractCegarLoop]: Abstraction has 7488 states and 10638 transitions. [2021-11-13 02:37:27,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 7 states have internal predecessors, (84), 2 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (17), 4 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 02:37:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 10638 transitions. [2021-11-13 02:37:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 02:37:27,568 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:27,568 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:27,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:27,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:27,783 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:27,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:27,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1626250849, now seen corresponding path program 1 times [2021-11-13 02:37:27,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:27,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1355273613] [2021-11-13 02:37:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:27,786 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:27,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:27,788 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:27,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 02:37:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:30,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:37:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:32,333 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-13 02:37:32,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-13 02:37:33,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:33,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1355273613] [2021-11-13 02:37:33,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1355273613] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:33,470 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:33,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 02:37:33,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300071730] [2021-11-13 02:37:33,470 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:33,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:37:33,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:33,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:37:33,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:37:33,472 INFO L87 Difference]: Start difference. First operand 7488 states and 10638 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-13 02:37:33,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:33,943 INFO L93 Difference]: Finished difference Result 14613 states and 20725 transitions. [2021-11-13 02:37:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:33,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 137 [2021-11-13 02:37:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:33,984 INFO L225 Difference]: With dead ends: 14613 [2021-11-13 02:37:33,984 INFO L226 Difference]: Without dead ends: 7128 [2021-11-13 02:37:34,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:37:34,015 INFO L933 BasicCegarLoop]: 1239 mSDtfsCounter, 1174 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.26ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.88ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:34,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 1239 Invalid, 5 Unknown, 0 Unchecked, 4.26ms Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 40.88ms Time] [2021-11-13 02:37:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7128 states. [2021-11-13 02:37:34,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7128 to 7128. [2021-11-13 02:37:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 5265 states have (on average 1.2866096866096866) internal successors, (6774), 5365 states have internal predecessors, (6774), 1456 states have call successors, (1456), 385 states have call predecessors, (1456), 406 states have return successors, (1836), 1417 states have call predecessors, (1836), 1444 states have call successors, (1836) [2021-11-13 02:37:34,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 10066 transitions. [2021-11-13 02:37:34,529 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 10066 transitions. Word has length 137 [2021-11-13 02:37:34,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:34,529 INFO L470 AbstractCegarLoop]: Abstraction has 7128 states and 10066 transitions. [2021-11-13 02:37:34,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-13 02:37:34,530 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 10066 transitions. [2021-11-13 02:37:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-13 02:37:34,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:34,538 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:34,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:34,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:34,763 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash 919558542, now seen corresponding path program 1 times [2021-11-13 02:37:34,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:34,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2120059306] [2021-11-13 02:37:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:34,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:34,766 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:34,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 02:37:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:37,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:37:37,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:37:38,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:38,934 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:37:38,934 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:38,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2120059306] [2021-11-13 02:37:38,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2120059306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:38,935 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:38,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:37:38,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389326135] [2021-11-13 02:37:38,935 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:38,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:37:38,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:38,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:37:38,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:38,937 INFO L87 Difference]: Start difference. First operand 7128 states and 10066 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:37:39,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:39,390 INFO L93 Difference]: Finished difference Result 16080 states and 23053 transitions. [2021-11-13 02:37:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:37:39,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 157 [2021-11-13 02:37:39,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:39,434 INFO L225 Difference]: With dead ends: 16080 [2021-11-13 02:37:39,434 INFO L226 Difference]: Without dead ends: 8955 [2021-11-13 02:37:39,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:37:39,462 INFO L933 BasicCegarLoop]: 1569 mSDtfsCounter, 487 mSDsluCounter, 1924 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 606 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.75ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.22ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:39,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [606 Valid, 3493 Invalid, 1 Unknown, 0 Unchecked, 7.75ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 11.22ms Time] [2021-11-13 02:37:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8955 states. [2021-11-13 02:37:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8955 to 7128. [2021-11-13 02:37:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7128 states, 5265 states have (on average 1.2850902184235518) internal successors, (6766), 5365 states have internal predecessors, (6766), 1456 states have call successors, (1456), 385 states have call predecessors, (1456), 406 states have return successors, (1836), 1417 states have call predecessors, (1836), 1444 states have call successors, (1836) [2021-11-13 02:37:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 10058 transitions. [2021-11-13 02:37:40,018 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 10058 transitions. Word has length 157 [2021-11-13 02:37:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:40,019 INFO L470 AbstractCegarLoop]: Abstraction has 7128 states and 10058 transitions. [2021-11-13 02:37:40,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:37:40,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 10058 transitions. [2021-11-13 02:37:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-13 02:37:40,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:40,027 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:40,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:40,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:40,247 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:40,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:40,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1641304304, now seen corresponding path program 1 times [2021-11-13 02:37:40,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:40,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409675756] [2021-11-13 02:37:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:40,250 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:40,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:40,251 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:40,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 02:37:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:42,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:37:42,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:37:43,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:37:44,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:44,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409675756] [2021-11-13 02:37:44,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409675756] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:44,356 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:44,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:37:44,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26302879] [2021-11-13 02:37:44,357 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:44,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:37:44,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:44,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:37:44,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:37:44,359 INFO L87 Difference]: Start difference. First operand 7128 states and 10058 transitions. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:37:46,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:46,554 INFO L93 Difference]: Finished difference Result 19166 states and 28025 transitions. [2021-11-13 02:37:46,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:37:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 157 [2021-11-13 02:37:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:46,612 INFO L225 Difference]: With dead ends: 19166 [2021-11-13 02:37:46,612 INFO L226 Difference]: Without dead ends: 12041 [2021-11-13 02:37:46,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:37:46,640 INFO L933 BasicCegarLoop]: 1793 mSDtfsCounter, 1680 mSDsluCounter, 6470 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1185.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 8263 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.82ms SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1290.76ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:46,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1728 Valid, 8263 Invalid, 415 Unknown, 0 Unchecked, 16.82ms Time], IncrementalHoareTripleChecker [353 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 1290.76ms Time] [2021-11-13 02:37:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12041 states. [2021-11-13 02:37:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12041 to 7152. [2021-11-13 02:37:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7152 states, 5289 states have (on average 1.2837965588958216) internal successors, (6790), 5389 states have internal predecessors, (6790), 1456 states have call successors, (1456), 385 states have call predecessors, (1456), 406 states have return successors, (1836), 1417 states have call predecessors, (1836), 1444 states have call successors, (1836) [2021-11-13 02:37:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 10082 transitions. [2021-11-13 02:37:47,392 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 10082 transitions. Word has length 157 [2021-11-13 02:37:47,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:47,394 INFO L470 AbstractCegarLoop]: Abstraction has 7152 states and 10082 transitions. [2021-11-13 02:37:47,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 02:37:47,394 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 10082 transitions. [2021-11-13 02:37:47,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-13 02:37:47,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:47,412 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:47,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:47,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:47,635 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:47,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1116225218, now seen corresponding path program 1 times [2021-11-13 02:37:47,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:47,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204778745] [2021-11-13 02:37:47,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:47,638 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:47,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:47,640 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:47,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 02:37:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:50,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:37:50,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 02:37:51,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 02:37:52,563 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:52,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204778745] [2021-11-13 02:37:52,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204778745] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:52,563 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:52,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 02:37:52,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044589038] [2021-11-13 02:37:52,564 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:52,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:37:52,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:52,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:37:52,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 02:37:52,565 INFO L87 Difference]: Start difference. First operand 7152 states and 10082 transitions. Second operand has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 6 states have internal predecessors, (163), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-13 02:37:53,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:53,309 INFO L93 Difference]: Finished difference Result 14355 states and 20223 transitions. [2021-11-13 02:37:53,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:37:53,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 6 states have internal predecessors, (163), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 164 [2021-11-13 02:37:53,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:53,344 INFO L225 Difference]: With dead ends: 14355 [2021-11-13 02:37:53,344 INFO L226 Difference]: Without dead ends: 7188 [2021-11-13 02:37:53,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 02:37:53,371 INFO L933 BasicCegarLoop]: 1247 mSDtfsCounter, 33 mSDsluCounter, 3715 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 4962 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.42ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.67ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:53,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 4962 Invalid, 18 Unknown, 0 Unchecked, 8.42ms Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 147.67ms Time] [2021-11-13 02:37:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7188 states. [2021-11-13 02:37:53,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7188 to 7148. [2021-11-13 02:37:53,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7148 states, 5287 states have (on average 1.2835256289010781) internal successors, (6786), 5392 states have internal predecessors, (6786), 1456 states have call successors, (1456), 385 states have call predecessors, (1456), 404 states have return successors, (1832), 1410 states have call predecessors, (1832), 1444 states have call successors, (1832) [2021-11-13 02:37:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7148 states to 7148 states and 10074 transitions. [2021-11-13 02:37:53,850 INFO L78 Accepts]: Start accepts. Automaton has 7148 states and 10074 transitions. Word has length 164 [2021-11-13 02:37:53,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:37:53,850 INFO L470 AbstractCegarLoop]: Abstraction has 7148 states and 10074 transitions. [2021-11-13 02:37:53,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.166666666666668) internal successors, (163), 6 states have internal predecessors, (163), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-13 02:37:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 7148 states and 10074 transitions. [2021-11-13 02:37:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 02:37:53,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:37:53,857 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:37:53,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 02:37:54,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:37:54,148 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:37:54,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:37:54,148 INFO L85 PathProgramCache]: Analyzing trace with hash -49576179, now seen corresponding path program 1 times [2021-11-13 02:37:54,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:37:54,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1876476919] [2021-11-13 02:37:54,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:37:54,151 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:37:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:37:54,153 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:37:54,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 02:37:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:37:56,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1391 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 02:37:56,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:37:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:37:57,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:37:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:37:58,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:37:58,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1876476919] [2021-11-13 02:37:58,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1876476919] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:37:58,588 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:37:58,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 02:37:58,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878377620] [2021-11-13 02:37:58,589 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:37:58,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:37:58,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:37:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:37:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 02:37:58,591 INFO L87 Difference]: Start difference. First operand 7148 states and 10074 transitions. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:37:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:37:59,873 INFO L93 Difference]: Finished difference Result 16202 states and 23159 transitions. [2021-11-13 02:37:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:37:59,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 163 [2021-11-13 02:37:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:37:59,920 INFO L225 Difference]: With dead ends: 16202 [2021-11-13 02:37:59,921 INFO L226 Difference]: Without dead ends: 9057 [2021-11-13 02:37:59,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-13 02:37:59,954 INFO L933 BasicCegarLoop]: 1537 mSDtfsCounter, 457 mSDsluCounter, 6678 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 397.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 8215 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.03ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 443.08ms IncrementalHoareTripleChecker+Time [2021-11-13 02:37:59,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 8215 Invalid, 134 Unknown, 0 Unchecked, 12.03ms Time], IncrementalHoareTripleChecker [109 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 443.08ms Time] [2021-11-13 02:37:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-11-13 02:38:00,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 7172. [2021-11-13 02:38:00,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7172 states, 5311 states have (on average 1.282244398418377) internal successors, (6810), 5416 states have internal predecessors, (6810), 1456 states have call successors, (1456), 385 states have call predecessors, (1456), 404 states have return successors, (1832), 1410 states have call predecessors, (1832), 1444 states have call successors, (1832) [2021-11-13 02:38:00,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7172 states to 7172 states and 10098 transitions. [2021-11-13 02:38:00,539 INFO L78 Accepts]: Start accepts. Automaton has 7172 states and 10098 transitions. Word has length 163 [2021-11-13 02:38:00,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:00,540 INFO L470 AbstractCegarLoop]: Abstraction has 7172 states and 10098 transitions. [2021-11-13 02:38:00,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:38:00,540 INFO L276 IsEmpty]: Start isEmpty. Operand 7172 states and 10098 transitions. [2021-11-13 02:38:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-13 02:38:00,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:00,546 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:00,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:00,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:00,771 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:00,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:00,771 INFO L85 PathProgramCache]: Analyzing trace with hash 762648883, now seen corresponding path program 1 times [2021-11-13 02:38:00,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:00,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644146715] [2021-11-13 02:38:00,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:00,773 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:00,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:00,774 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:00,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 02:38:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:03,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1453 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:38:03,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:38:04,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:38:06,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:06,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644146715] [2021-11-13 02:38:06,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644146715] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:06,933 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:06,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:38:06,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876691433] [2021-11-13 02:38:06,934 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:06,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:06,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:06,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:06,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2021-11-13 02:38:06,936 INFO L87 Difference]: Start difference. First operand 7172 states and 10098 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:38:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:07,420 INFO L93 Difference]: Finished difference Result 14349 states and 20209 transitions. [2021-11-13 02:38:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:38:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 173 [2021-11-13 02:38:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:07,452 INFO L225 Difference]: With dead ends: 14349 [2021-11-13 02:38:07,452 INFO L226 Difference]: Without dead ends: 7180 [2021-11-13 02:38:07,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=6, Invalid=5, Unknown=1, NotChecked=0, Total=12 [2021-11-13 02:38:07,481 INFO L933 BasicCegarLoop]: 1240 mSDtfsCounter, 0 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.60ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 33.37ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:07,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2476 Invalid, 4 Unknown, 0 Unchecked, 4.60ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 1 Unchecked, 33.37ms Time] [2021-11-13 02:38:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7180 states. [2021-11-13 02:38:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7180 to 7180. [2021-11-13 02:38:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7180 states, 5319 states have (on average 1.2818198909569467) internal successors, (6818), 5424 states have internal predecessors, (6818), 1456 states have call successors, (1456), 385 states have call predecessors, (1456), 404 states have return successors, (1832), 1410 states have call predecessors, (1832), 1444 states have call successors, (1832) [2021-11-13 02:38:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7180 states to 7180 states and 10106 transitions. [2021-11-13 02:38:07,992 INFO L78 Accepts]: Start accepts. Automaton has 7180 states and 10106 transitions. Word has length 173 [2021-11-13 02:38:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:07,994 INFO L470 AbstractCegarLoop]: Abstraction has 7180 states and 10106 transitions. [2021-11-13 02:38:07,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:38:07,995 INFO L276 IsEmpty]: Start isEmpty. Operand 7180 states and 10106 transitions. [2021-11-13 02:38:08,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 02:38:08,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:08,001 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:08,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:08,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:08,215 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:08,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:08,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1882607828, now seen corresponding path program 1 times [2021-11-13 02:38:08,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:08,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086373560] [2021-11-13 02:38:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:08,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:08,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:08,218 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:08,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 02:38:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:10,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 1466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:10,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:38:11,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:38:12,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:12,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086373560] [2021-11-13 02:38:12,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086373560] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:12,272 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:12,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:38:12,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514075376] [2021-11-13 02:38:12,272 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:12,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:12,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:12,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:12,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:38:12,273 INFO L87 Difference]: Start difference. First operand 7180 states and 10106 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:38:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:12,741 INFO L93 Difference]: Finished difference Result 14373 states and 20241 transitions. [2021-11-13 02:38:12,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:38:12,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 176 [2021-11-13 02:38:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:12,770 INFO L225 Difference]: With dead ends: 14373 [2021-11-13 02:38:12,771 INFO L226 Difference]: Without dead ends: 7196 [2021-11-13 02:38:12,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:38:12,797 INFO L933 BasicCegarLoop]: 1240 mSDtfsCounter, 0 mSDsluCounter, 2476 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3716 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.69ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.21ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:12,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3716 Invalid, 6 Unknown, 0 Unchecked, 6.69ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 77.21ms Time] [2021-11-13 02:38:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7196 states. [2021-11-13 02:38:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7196 to 7196. [2021-11-13 02:38:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7196 states, 5335 states have (on average 1.280974695407685) internal successors, (6834), 5440 states have internal predecessors, (6834), 1456 states have call successors, (1456), 385 states have call predecessors, (1456), 404 states have return successors, (1832), 1410 states have call predecessors, (1832), 1444 states have call successors, (1832) [2021-11-13 02:38:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7196 states to 7196 states and 10122 transitions. [2021-11-13 02:38:13,446 INFO L78 Accepts]: Start accepts. Automaton has 7196 states and 10122 transitions. Word has length 176 [2021-11-13 02:38:13,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:13,447 INFO L470 AbstractCegarLoop]: Abstraction has 7196 states and 10122 transitions. [2021-11-13 02:38:13,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 02:38:13,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7196 states and 10122 transitions. [2021-11-13 02:38:13,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-13 02:38:13,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:13,453 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:13,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-13 02:38:13,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:13,675 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1349831084, now seen corresponding path program 1 times [2021-11-13 02:38:13,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:13,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415168466] [2021-11-13 02:38:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:13,678 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:13,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:13,680 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:13,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 02:38:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:16,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:38:16,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:38:17,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:38:18,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:18,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415168466] [2021-11-13 02:38:18,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415168466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:38:18,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [977289996] [2021-11-13 02:38:18,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:18,503 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:38:18,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:38:18,504 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:38:18,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-13 02:38:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:19,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 1476 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:38:19,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 02:38:20,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-13 02:38:20,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [977289996] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:20,854 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:38:20,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:38:20,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109467513] [2021-11-13 02:38:20,855 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:20,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:38:20,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:20,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:38:20,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:38:20,856 INFO L87 Difference]: Start difference. First operand 7196 states and 10122 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 02:38:22,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:23,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:23,443 INFO L93 Difference]: Finished difference Result 14401 states and 20324 transitions. [2021-11-13 02:38:23,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:38:23,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 178 [2021-11-13 02:38:23,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:23,467 INFO L225 Difference]: With dead ends: 14401 [2021-11-13 02:38:23,468 INFO L226 Difference]: Without dead ends: 7208 [2021-11-13 02:38:23,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 708 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:38:23,497 INFO L933 BasicCegarLoop]: 1987 mSDtfsCounter, 1207 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2163.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1207 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.28ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2203.70ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:23,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1207 Valid, 3214 Invalid, 9 Unknown, 0 Unchecked, 5.28ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2203.70ms Time] [2021-11-13 02:38:23,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7208 states. [2021-11-13 02:38:23,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7208 to 7190. [2021-11-13 02:38:23,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7190 states, 5329 states have (on average 1.2797898292362544) internal successors, (6820), 5437 states have internal predecessors, (6820), 1456 states have call successors, (1456), 385 states have call predecessors, (1456), 404 states have return successors, (1760), 1407 states have call predecessors, (1760), 1444 states have call successors, (1760) [2021-11-13 02:38:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7190 states to 7190 states and 10036 transitions. [2021-11-13 02:38:24,013 INFO L78 Accepts]: Start accepts. Automaton has 7190 states and 10036 transitions. Word has length 178 [2021-11-13 02:38:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:24,014 INFO L470 AbstractCegarLoop]: Abstraction has 7190 states and 10036 transitions. [2021-11-13 02:38:24,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 02:38:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7190 states and 10036 transitions. [2021-11-13 02:38:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-13 02:38:24,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:24,019 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:24,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:24,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:24,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:24,431 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:24,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:24,432 INFO L85 PathProgramCache]: Analyzing trace with hash -221710289, now seen corresponding path program 1 times [2021-11-13 02:38:24,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:24,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75274416] [2021-11-13 02:38:24,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:24,434 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:24,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:24,435 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:24,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 02:38:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:26,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1460 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:38:26,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 02:38:28,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-13 02:38:29,249 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:29,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75274416] [2021-11-13 02:38:29,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75274416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:38:29,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1720453505] [2021-11-13 02:38:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:29,250 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:38:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:38:29,251 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:38:29,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-13 02:38:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:30,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1460 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:38:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:31,320 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:38:31,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 02:38:32,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1720453505] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:32,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:38:32,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-13 02:38:32,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745333521] [2021-11-13 02:38:32,177 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:32,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 02:38:32,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:32,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 02:38:32,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-13 02:38:32,178 INFO L87 Difference]: Start difference. First operand 7190 states and 10036 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 02:38:33,606 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:38:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:34,139 INFO L93 Difference]: Finished difference Result 7248 states and 10189 transitions. [2021-11-13 02:38:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:38:34,140 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 175 [2021-11-13 02:38:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:34,160 INFO L225 Difference]: With dead ends: 7248 [2021-11-13 02:38:34,160 INFO L226 Difference]: Without dead ends: 7128 [2021-11-13 02:38:34,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:38:34,167 INFO L933 BasicCegarLoop]: 1258 mSDtfsCounter, 22 mSDsluCounter, 4996 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1401.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 6254 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.53ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1432.54ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:34,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 6254 Invalid, 54 Unknown, 0 Unchecked, 6.53ms Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 1432.54ms Time] [2021-11-13 02:38:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7128 states. [2021-11-13 02:38:34,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7128 to 7112. [2021-11-13 02:38:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7112 states, 5267 states have (on average 1.2762483387127397) internal successors, (6722), 5373 states have internal predecessors, (6722), 1436 states have call successors, (1436), 384 states have call predecessors, (1436), 408 states have return successors, (1744), 1394 states have call predecessors, (1744), 1428 states have call successors, (1744) [2021-11-13 02:38:34,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7112 states to 7112 states and 9902 transitions. [2021-11-13 02:38:34,772 INFO L78 Accepts]: Start accepts. Automaton has 7112 states and 9902 transitions. Word has length 175 [2021-11-13 02:38:34,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:34,774 INFO L470 AbstractCegarLoop]: Abstraction has 7112 states and 9902 transitions. [2021-11-13 02:38:34,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 02:38:34,775 INFO L276 IsEmpty]: Start isEmpty. Operand 7112 states and 9902 transitions. [2021-11-13 02:38:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-13 02:38:34,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:34,789 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:34,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:35,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:35,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:35,200 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:35,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:35,200 INFO L85 PathProgramCache]: Analyzing trace with hash 844644665, now seen corresponding path program 1 times [2021-11-13 02:38:35,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:35,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524098598] [2021-11-13 02:38:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:35,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:35,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:35,203 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:35,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 02:38:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:37,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:38:37,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 02:38:41,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 02:38:43,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:43,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524098598] [2021-11-13 02:38:43,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524098598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:43,968 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:43,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 02:38:43,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692722381] [2021-11-13 02:38:43,969 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:43,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:38:43,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:38:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:38:43,971 INFO L87 Difference]: Start difference. First operand 7112 states and 9902 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 3 states have call successors, (53), 3 states have call predecessors, (53), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-13 02:38:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:44,508 INFO L93 Difference]: Finished difference Result 7155 states and 9945 transitions. [2021-11-13 02:38:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:38:44,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 3 states have call successors, (53), 3 states have call predecessors, (53), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 252 [2021-11-13 02:38:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:44,516 INFO L225 Difference]: With dead ends: 7155 [2021-11-13 02:38:44,516 INFO L226 Difference]: Without dead ends: 3574 [2021-11-13 02:38:44,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 02:38:44,528 INFO L933 BasicCegarLoop]: 1150 mSDtfsCounter, 1018 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 354.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.30ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 371.67ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:44,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1018 Valid, 1150 Invalid, 81 Unknown, 0 Unchecked, 2.30ms Time], IncrementalHoareTripleChecker [40 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 371.67ms Time] [2021-11-13 02:38:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3574 states. [2021-11-13 02:38:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3574 to 3574. [2021-11-13 02:38:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3574 states, 2647 states have (on average 1.2440498677748395) internal successors, (3293), 2701 states have internal predecessors, (3293), 722 states have call successors, (722), 193 states have call predecessors, (722), 204 states have return successors, (804), 699 states have call predecessors, (804), 714 states have call successors, (804) [2021-11-13 02:38:44,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3574 states to 3574 states and 4819 transitions. [2021-11-13 02:38:44,785 INFO L78 Accepts]: Start accepts. Automaton has 3574 states and 4819 transitions. Word has length 252 [2021-11-13 02:38:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:44,785 INFO L470 AbstractCegarLoop]: Abstraction has 3574 states and 4819 transitions. [2021-11-13 02:38:44,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 3 states have call successors, (53), 3 states have call predecessors, (53), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2021-11-13 02:38:44,786 INFO L276 IsEmpty]: Start isEmpty. Operand 3574 states and 4819 transitions. [2021-11-13 02:38:44,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-13 02:38:44,792 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:44,792 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:44,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:45,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:45,007 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:45,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:45,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1077721911, now seen corresponding path program 1 times [2021-11-13 02:38:45,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:45,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794336516] [2021-11-13 02:38:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:45,009 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:45,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:45,010 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:45,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 02:38:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:47,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:38:47,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 02:38:48,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 02:38:49,714 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:49,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794336516] [2021-11-13 02:38:49,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794336516] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:49,714 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 02:38:49,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 02:38:49,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505709273] [2021-11-13 02:38:49,715 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:49,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 02:38:49,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:49,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 02:38:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:38:49,717 INFO L87 Difference]: Start difference. First operand 3574 states and 4819 transitions. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-13 02:38:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:50,040 INFO L93 Difference]: Finished difference Result 7165 states and 9675 transitions. [2021-11-13 02:38:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 02:38:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 252 [2021-11-13 02:38:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:50,051 INFO L225 Difference]: With dead ends: 7165 [2021-11-13 02:38:50,051 INFO L226 Difference]: Without dead ends: 3594 [2021-11-13 02:38:50,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 02:38:50,059 INFO L933 BasicCegarLoop]: 1189 mSDtfsCounter, 6 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2373 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.30ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.94ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:50,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2373 Invalid, 13 Unknown, 0 Unchecked, 3.30ms Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 91.94ms Time] [2021-11-13 02:38:50,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3594 states. [2021-11-13 02:38:50,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3594 to 3594. [2021-11-13 02:38:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3594 states, 2663 states have (on average 1.2425835523845288) internal successors, (3309), 2717 states have internal predecessors, (3309), 726 states have call successors, (726), 193 states have call predecessors, (726), 204 states have return successors, (808), 703 states have call predecessors, (808), 718 states have call successors, (808) [2021-11-13 02:38:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3594 states to 3594 states and 4843 transitions. [2021-11-13 02:38:50,287 INFO L78 Accepts]: Start accepts. Automaton has 3594 states and 4843 transitions. Word has length 252 [2021-11-13 02:38:50,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:38:50,288 INFO L470 AbstractCegarLoop]: Abstraction has 3594 states and 4843 transitions. [2021-11-13 02:38:50,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 2 states have call successors, (39), 2 states have call predecessors, (39), 2 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2021-11-13 02:38:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3594 states and 4843 transitions. [2021-11-13 02:38:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-13 02:38:50,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:38:50,295 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:38:50,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 02:38:50,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:38:50,511 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:38:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:38:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1366591199, now seen corresponding path program 1 times [2021-11-13 02:38:50,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:38:50,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672436138] [2021-11-13 02:38:50,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:50,514 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:38:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:38:50,514 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:38:50,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 02:38:53,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:53,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:38:53,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:38:54,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 02:38:56,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:38:56,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672436138] [2021-11-13 02:38:56,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672436138] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:38:56,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [919402521] [2021-11-13 02:38:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:38:56,307 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:38:56,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:38:56,308 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:38:56,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-13 02:38:57,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:38:57,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 02:38:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:38:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 02:38:58,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:38:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 02:38:59,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [919402521] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:38:59,381 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:38:59,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:38:59,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759796127] [2021-11-13 02:38:59,382 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:38:59,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:38:59,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:38:59,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:38:59,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:38:59,384 INFO L87 Difference]: Start difference. First operand 3594 states and 4843 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-13 02:38:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:38:59,789 INFO L93 Difference]: Finished difference Result 8144 states and 11103 transitions. [2021-11-13 02:38:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:38:59,790 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 240 [2021-11-13 02:38:59,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:38:59,804 INFO L225 Difference]: With dead ends: 8144 [2021-11-13 02:38:59,805 INFO L226 Difference]: Without dead ends: 4553 [2021-11-13 02:38:59,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 949 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:38:59,813 INFO L933 BasicCegarLoop]: 1510 mSDtfsCounter, 219 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 2739 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.10ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 115.06ms IncrementalHoareTripleChecker+Time [2021-11-13 02:38:59,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 2739 Invalid, 12 Unknown, 0 Unchecked, 4.10ms Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 115.06ms Time] [2021-11-13 02:38:59,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4553 states. [2021-11-13 02:39:00,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4553 to 3602. [2021-11-13 02:39:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3602 states, 2671 states have (on average 1.241856982403594) internal successors, (3317), 2725 states have internal predecessors, (3317), 726 states have call successors, (726), 193 states have call predecessors, (726), 204 states have return successors, (808), 703 states have call predecessors, (808), 718 states have call successors, (808) [2021-11-13 02:39:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 4851 transitions. [2021-11-13 02:39:00,028 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 4851 transitions. Word has length 240 [2021-11-13 02:39:00,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:00,029 INFO L470 AbstractCegarLoop]: Abstraction has 3602 states and 4851 transitions. [2021-11-13 02:39:00,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-13 02:39:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 4851 transitions. [2021-11-13 02:39:00,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-13 02:39:00,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:00,036 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:00,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:00,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:00,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:00,451 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:00,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:00,451 INFO L85 PathProgramCache]: Analyzing trace with hash -105673949, now seen corresponding path program 1 times [2021-11-13 02:39:00,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:00,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1682372848] [2021-11-13 02:39:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:00,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:00,455 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:00,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-13 02:39:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:03,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:39:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 02:39:04,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 02:39:06,623 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:06,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1682372848] [2021-11-13 02:39:06,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1682372848] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:06,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1538582016] [2021-11-13 02:39:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:06,624 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:06,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:06,625 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:06,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-13 02:39:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:07,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 02:39:07,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 02:39:09,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 02:39:10,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1538582016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:10,284 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:39:10,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 11 [2021-11-13 02:39:10,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143715670] [2021-11-13 02:39:10,285 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:10,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 02:39:10,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:10,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 02:39:10,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 02:39:10,286 INFO L87 Difference]: Start difference. First operand 3602 states and 4851 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-13 02:39:11,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:11,225 INFO L93 Difference]: Finished difference Result 3638 states and 4918 transitions. [2021-11-13 02:39:11,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 02:39:11,226 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 240 [2021-11-13 02:39:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:11,230 INFO L225 Difference]: With dead ends: 3638 [2021-11-13 02:39:11,230 INFO L226 Difference]: Without dead ends: 1872 [2021-11-13 02:39:11,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 947 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:39:11,235 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 80 mSDsluCounter, 3480 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 519.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 4681 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.45ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 550.06ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:11,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 4681 Invalid, 55 Unknown, 0 Unchecked, 5.45ms Time], IncrementalHoareTripleChecker [35 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 550.06ms Time] [2021-11-13 02:39:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1872 states. [2021-11-13 02:39:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1864. [2021-11-13 02:39:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1379 states have (on average 1.239303843364757) internal successors, (1709), 1406 states have internal predecessors, (1709), 378 states have call successors, (378), 103 states have call predecessors, (378), 106 states have return successors, (404), 364 states have call predecessors, (404), 372 states have call successors, (404) [2021-11-13 02:39:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2491 transitions. [2021-11-13 02:39:11,342 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2491 transitions. Word has length 240 [2021-11-13 02:39:11,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:11,342 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 2491 transitions. [2021-11-13 02:39:11,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 2 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-13 02:39:11,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2491 transitions. [2021-11-13 02:39:11,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-13 02:39:11,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:11,347 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:11,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:11,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:11,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:11,759 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:11,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:11,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1155580892, now seen corresponding path program 1 times [2021-11-13 02:39:11,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:11,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895994919] [2021-11-13 02:39:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:11,763 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:11,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:11,763 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:11,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-13 02:39:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:14,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:39:14,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:16,055 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 02:39:16,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 02:39:17,238 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:17,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895994919] [2021-11-13 02:39:17,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895994919] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:17,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1960923788] [2021-11-13 02:39:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:17,238 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:17,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:17,239 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:17,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-13 02:39:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:18,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 1606 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:39:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-13 02:39:19,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-13 02:39:19,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1960923788] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:19,877 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:39:19,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:39:19,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981584408] [2021-11-13 02:39:19,878 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:19,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:39:19,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:39:19,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:39:19,880 INFO L87 Difference]: Start difference. First operand 1864 states and 2491 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2021-11-13 02:39:21,998 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:39:22,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:22,197 INFO L93 Difference]: Finished difference Result 3727 states and 4980 transitions. [2021-11-13 02:39:22,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:39:22,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 263 [2021-11-13 02:39:22,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:22,206 INFO L225 Difference]: With dead ends: 3727 [2021-11-13 02:39:22,206 INFO L226 Difference]: Without dead ends: 1866 [2021-11-13 02:39:22,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 1041 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:39:22,210 INFO L933 BasicCegarLoop]: 2271 mSDtfsCounter, 1152 mSDsluCounter, 1169 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2173.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.87ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2216.97ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:22,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1152 Valid, 3440 Invalid, 9 Unknown, 0 Unchecked, 3.87ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2216.97ms Time] [2021-11-13 02:39:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-11-13 02:39:22,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1864. [2021-11-13 02:39:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1379 states have (on average 1.2378535170413343) internal successors, (1707), 1406 states have internal predecessors, (1707), 378 states have call successors, (378), 103 states have call predecessors, (378), 106 states have return successors, (392), 364 states have call predecessors, (392), 366 states have call successors, (392) [2021-11-13 02:39:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2477 transitions. [2021-11-13 02:39:22,348 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2477 transitions. Word has length 263 [2021-11-13 02:39:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:22,349 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 2477 transitions. [2021-11-13 02:39:22,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 3 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2021-11-13 02:39:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2477 transitions. [2021-11-13 02:39:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-13 02:39:22,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:22,354 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:22,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:22,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:22,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:22,767 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:22,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:22,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1448983899, now seen corresponding path program 1 times [2021-11-13 02:39:22,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:22,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1807492377] [2021-11-13 02:39:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:22,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:22,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:22,770 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:22,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-13 02:39:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:39:25,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 02:39:27,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 02:39:28,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:28,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1807492377] [2021-11-13 02:39:28,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1807492377] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:28,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1011827504] [2021-11-13 02:39:28,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:28,205 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:28,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:28,206 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:28,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-13 02:39:29,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:29,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 1605 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:39:29,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:30,600 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-13 02:39:30,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-13 02:39:32,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1011827504] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:32,001 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:39:32,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-13 02:39:32,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760366294] [2021-11-13 02:39:32,002 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:32,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:39:32,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:32,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:39:32,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:39:32,004 INFO L87 Difference]: Start difference. First operand 1864 states and 2477 transitions. Second operand has 10 states, 10 states have (on average 16.4) internal successors, (164), 8 states have internal predecessors, (164), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-13 02:39:32,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:32,590 INFO L93 Difference]: Finished difference Result 1874 states and 2486 transitions. [2021-11-13 02:39:32,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:39:32,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.4) internal successors, (164), 8 states have internal predecessors, (164), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 1 states have call successors, (27) Word has length 263 [2021-11-13 02:39:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:32,600 INFO L225 Difference]: With dead ends: 1874 [2021-11-13 02:39:32,601 INFO L226 Difference]: Without dead ends: 1859 [2021-11-13 02:39:32,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1049 GetRequests, 1034 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-13 02:39:32,603 INFO L933 BasicCegarLoop]: 1190 mSDtfsCounter, 6 mSDsluCounter, 8303 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 299.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9493 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.84ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 308.87ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:32,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 9493 Invalid, 33 Unknown, 0 Unchecked, 9.84ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 308.87ms Time] [2021-11-13 02:39:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2021-11-13 02:39:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1857. [2021-11-13 02:39:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1374 states have (on average 1.2365356622998545) internal successors, (1699), 1400 states have internal predecessors, (1699), 376 states have call successors, (376), 103 states have call predecessors, (376), 106 states have return successors, (391), 363 states have call predecessors, (391), 365 states have call successors, (391) [2021-11-13 02:39:32,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2466 transitions. [2021-11-13 02:39:32,748 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2466 transitions. Word has length 263 [2021-11-13 02:39:32,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:32,748 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2466 transitions. [2021-11-13 02:39:32,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.4) internal successors, (164), 8 states have internal predecessors, (164), 2 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 3 states have call predecessors, (27), 1 states have call successors, (27) [2021-11-13 02:39:32,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2466 transitions. [2021-11-13 02:39:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-13 02:39:32,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:32,754 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:32,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:32,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2021-11-13 02:39:33,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:33,179 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash -640718870, now seen corresponding path program 1 times [2021-11-13 02:39:33,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:33,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789968359] [2021-11-13 02:39:33,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:33,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:33,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:33,184 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:33,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-13 02:39:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:35,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:39:35,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 02:39:37,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-13 02:39:38,953 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:38,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789968359] [2021-11-13 02:39:38,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789968359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:38,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1125368211] [2021-11-13 02:39:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:38,954 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:38,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:38,959 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:38,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-13 02:39:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:40,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 1638 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 02:39:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-13 02:39:41,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:41,779 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-11-13 02:39:41,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1125368211] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:41,779 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:39:41,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-13 02:39:41,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656086781] [2021-11-13 02:39:41,780 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:41,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 02:39:41,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:41,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 02:39:41,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:39:41,781 INFO L87 Difference]: Start difference. First operand 1857 states and 2466 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-13 02:39:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:42,008 INFO L93 Difference]: Finished difference Result 4632 states and 6290 transitions. [2021-11-13 02:39:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 02:39:42,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 284 [2021-11-13 02:39:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:42,019 INFO L225 Difference]: With dead ends: 4632 [2021-11-13 02:39:42,019 INFO L226 Difference]: Without dead ends: 2778 [2021-11-13 02:39:42,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1132 GetRequests, 1125 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-13 02:39:42,023 INFO L933 BasicCegarLoop]: 1820 mSDtfsCounter, 427 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 3082 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.04ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.23ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:42,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [546 Valid, 3082 Invalid, 13 Unknown, 0 Unchecked, 3.04ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 89.23ms Time] [2021-11-13 02:39:42,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-11-13 02:39:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 1855. [2021-11-13 02:39:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1855 states, 1372 states have (on average 1.2354227405247813) internal successors, (1695), 1396 states have internal predecessors, (1695), 376 states have call successors, (376), 103 states have call predecessors, (376), 106 states have return successors, (391), 363 states have call predecessors, (391), 365 states have call successors, (391) [2021-11-13 02:39:42,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1855 states to 1855 states and 2462 transitions. [2021-11-13 02:39:42,140 INFO L78 Accepts]: Start accepts. Automaton has 1855 states and 2462 transitions. Word has length 284 [2021-11-13 02:39:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:42,141 INFO L470 AbstractCegarLoop]: Abstraction has 1855 states and 2462 transitions. [2021-11-13 02:39:42,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 2 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-13 02:39:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1855 states and 2462 transitions. [2021-11-13 02:39:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-13 02:39:42,145 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:42,145 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:42,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:42,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:42,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:39:42,546 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:42,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1860169941, now seen corresponding path program 1 times [2021-11-13 02:39:42,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:42,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198731357] [2021-11-13 02:39:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:42,549 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:42,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:42,551 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:42,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-13 02:39:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:45,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:39:45,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 02:39:47,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-13 02:39:48,716 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:39:48,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198731357] [2021-11-13 02:39:48,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198731357] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:39:48,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1916412391] [2021-11-13 02:39:48,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:48,717 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:48,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:39:48,717 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:39:48,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-13 02:39:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:50,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:39:50,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 02:39:51,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:39:52,688 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 02:39:52,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1916412391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:39:52,689 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:39:52,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-13 02:39:52,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530706148] [2021-11-13 02:39:52,689 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:39:52,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:39:52,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:39:52,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:39:52,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:39:52,690 INFO L87 Difference]: Start difference. First operand 1855 states and 2462 transitions. Second operand has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 5 states have internal predecessors, (203), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-13 02:39:53,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:39:53,135 INFO L93 Difference]: Finished difference Result 2746 states and 3644 transitions. [2021-11-13 02:39:53,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:39:53,135 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 5 states have internal predecessors, (203), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) Word has length 306 [2021-11-13 02:39:53,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:39:53,141 INFO L225 Difference]: With dead ends: 2746 [2021-11-13 02:39:53,141 INFO L226 Difference]: Without dead ends: 1851 [2021-11-13 02:39:53,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1221 GetRequests, 1210 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:39:53,144 INFO L933 BasicCegarLoop]: 1182 mSDtfsCounter, 21 mSDsluCounter, 4698 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 185.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 5880 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.95ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 195.73ms IncrementalHoareTripleChecker+Time [2021-11-13 02:39:53,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 5880 Invalid, 24 Unknown, 0 Unchecked, 5.95ms Time], IncrementalHoareTripleChecker [6 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 195.73ms Time] [2021-11-13 02:39:53,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2021-11-13 02:39:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1849. [2021-11-13 02:39:53,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1849 states, 1367 states have (on average 1.2355523043160206) internal successors, (1689), 1392 states have internal predecessors, (1689), 376 states have call successors, (376), 103 states have call predecessors, (376), 105 states have return successors, (389), 361 states have call predecessors, (389), 365 states have call successors, (389) [2021-11-13 02:39:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1849 states to 1849 states and 2454 transitions. [2021-11-13 02:39:53,244 INFO L78 Accepts]: Start accepts. Automaton has 1849 states and 2454 transitions. Word has length 306 [2021-11-13 02:39:53,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:39:53,244 INFO L470 AbstractCegarLoop]: Abstraction has 1849 states and 2454 transitions. [2021-11-13 02:39:53,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.833333333333336) internal successors, (203), 5 states have internal predecessors, (203), 2 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (39), 3 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-13 02:39:53,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1849 states and 2454 transitions. [2021-11-13 02:39:53,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2021-11-13 02:39:53,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:39:53,251 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:39:53,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:53,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-13 02:39:53,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:39:53,655 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:39:53,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:39:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash -31500956, now seen corresponding path program 1 times [2021-11-13 02:39:53,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:39:53,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [922994971] [2021-11-13 02:39:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:39:53,658 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:39:53,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:39:53,658 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:39:53,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-13 02:39:56,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:39:56,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:39:56,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:39:58,949 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-13 02:39:58,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-13 02:40:00,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:00,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [922994971] [2021-11-13 02:40:00,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [922994971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:00,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [927866302] [2021-11-13 02:40:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:00,478 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:40:00,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:40:00,479 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:40:00,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-13 02:40:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:01,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:40:01,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-13 02:40:03,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:05,326 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 02:40:05,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [927866302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:05,327 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:40:05,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [5, 5] total 16 [2021-11-13 02:40:05,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126722551] [2021-11-13 02:40:05,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:05,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:40:05,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:05,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:40:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:40:05,329 INFO L87 Difference]: Start difference. First operand 1849 states and 2454 transitions. Second operand has 10 states, 10 states have (on average 22.8) internal successors, (228), 8 states have internal predecessors, (228), 2 states have call successors, (46), 2 states have call predecessors, (46), 4 states have return successors, (44), 4 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-13 02:40:07,833 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:09,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:12,018 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:14,125 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:16,162 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:18,197 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:23,266 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:25,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:27,478 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:30,287 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:32,450 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:34,525 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:40:35,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:35,964 INFO L93 Difference]: Finished difference Result 6756 states and 9392 transitions. [2021-11-13 02:40:35,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:40:35,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 22.8) internal successors, (228), 8 states have internal predecessors, (228), 2 states have call successors, (46), 2 states have call predecessors, (46), 4 states have return successors, (44), 4 states have call predecessors, (44), 2 states have call successors, (44) Word has length 336 [2021-11-13 02:40:35,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:35,980 INFO L225 Difference]: With dead ends: 6756 [2021-11-13 02:40:35,980 INFO L226 Difference]: Without dead ends: 4910 [2021-11-13 02:40:35,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1351 GetRequests, 1331 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:40:35,985 INFO L933 BasicCegarLoop]: 2260 mSDtfsCounter, 1510 mSDsluCounter, 14237 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 343 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27474.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 16497 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.24ms SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28599.50ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:35,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1741 Valid, 16497 Invalid, 557 Unknown, 0 Unchecked, 22.24ms Time], IncrementalHoareTripleChecker [343 Valid, 202 Invalid, 12 Unknown, 0 Unchecked, 28599.50ms Time] [2021-11-13 02:40:35,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2021-11-13 02:40:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 1857. [2021-11-13 02:40:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1373 states have (on average 1.2345229424617625) internal successors, (1695), 1398 states have internal predecessors, (1695), 376 states have call successors, (376), 103 states have call predecessors, (376), 107 states have return successors, (407), 363 states have call predecessors, (407), 365 states have call successors, (407) [2021-11-13 02:40:36,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2478 transitions. [2021-11-13 02:40:36,125 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2478 transitions. Word has length 336 [2021-11-13 02:40:36,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:36,126 INFO L470 AbstractCegarLoop]: Abstraction has 1857 states and 2478 transitions. [2021-11-13 02:40:36,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.8) internal successors, (228), 8 states have internal predecessors, (228), 2 states have call successors, (46), 2 states have call predecessors, (46), 4 states have return successors, (44), 4 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-13 02:40:36,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2478 transitions. [2021-11-13 02:40:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-11-13 02:40:36,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:36,132 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:36,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:36,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:36,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:36,564 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:36,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:36,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1668366159, now seen corresponding path program 1 times [2021-11-13 02:40:36,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:36,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [825164573] [2021-11-13 02:40:36,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:36,567 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:36,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:36,568 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:36,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-13 02:40:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:40:39,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-13 02:40:43,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-13 02:40:45,192 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:40:45,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [825164573] [2021-11-13 02:40:45,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [825164573] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:40:45,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [960943306] [2021-11-13 02:40:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:45,193 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:40:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:40:45,198 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:40:45,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2021-11-13 02:40:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:40:46,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:40:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:40:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-13 02:40:48,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:40:50,995 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-13 02:40:50,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [960943306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:40:50,995 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:40:50,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 5] imperfect sequences [5, 5] total 16 [2021-11-13 02:40:50,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482452660] [2021-11-13 02:40:50,996 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:40:50,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:40:50,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:40:50,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:40:50,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:40:50,998 INFO L87 Difference]: Start difference. First operand 1857 states and 2478 transitions. Second operand has 10 states, 10 states have (on average 21.8) internal successors, (218), 8 states have internal predecessors, (218), 2 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (39), 4 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-13 02:40:57,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:40:57,604 INFO L93 Difference]: Finished difference Result 6772 states and 9480 transitions. [2021-11-13 02:40:57,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:40:57,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 21.8) internal successors, (218), 8 states have internal predecessors, (218), 2 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (39), 4 states have call predecessors, (39), 2 states have call successors, (39) Word has length 356 [2021-11-13 02:40:57,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:40:57,617 INFO L225 Difference]: With dead ends: 6772 [2021-11-13 02:40:57,617 INFO L226 Difference]: Without dead ends: 4918 [2021-11-13 02:40:57,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1431 GetRequests, 1411 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-13 02:40:57,622 INFO L933 BasicCegarLoop]: 2220 mSDtfsCounter, 1990 mSDsluCounter, 10287 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4062.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2239 SdHoareTripleChecker+Valid, 12507 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.97ms SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4338.25ms IncrementalHoareTripleChecker+Time [2021-11-13 02:40:57,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2239 Valid, 12507 Invalid, 784 Unknown, 0 Unchecked, 20.97ms Time], IncrementalHoareTripleChecker [569 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 4338.25ms Time] [2021-11-13 02:40:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4918 states. [2021-11-13 02:40:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4918 to 1861. [2021-11-13 02:40:57,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1377 states have (on average 1.233841684822077) internal successors, (1699), 1400 states have internal predecessors, (1699), 376 states have call successors, (376), 103 states have call predecessors, (376), 107 states have return successors, (407), 365 states have call predecessors, (407), 365 states have call successors, (407) [2021-11-13 02:40:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2482 transitions. [2021-11-13 02:40:57,815 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2482 transitions. Word has length 356 [2021-11-13 02:40:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:40:57,815 INFO L470 AbstractCegarLoop]: Abstraction has 1861 states and 2482 transitions. [2021-11-13 02:40:57,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.8) internal successors, (218), 8 states have internal predecessors, (218), 2 states have call successors, (41), 2 states have call predecessors, (41), 4 states have return successors, (39), 4 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-13 02:40:57,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2482 transitions. [2021-11-13 02:40:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-13 02:40:57,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:40:57,820 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:40:57,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2021-11-13 02:40:58,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-13 02:40:58,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:40:58,234 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:40:58,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:40:58,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1646137257, now seen corresponding path program 1 times [2021-11-13 02:40:58,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:40:58,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524260668] [2021-11-13 02:40:58,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:40:58,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:40:58,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:40:58,238 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:40:58,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-13 02:41:01,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:01,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1951 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:41:01,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-13 02:41:04,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-13 02:41:07,106 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:07,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524260668] [2021-11-13 02:41:07,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524260668] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:41:07,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [640473454] [2021-11-13 02:41:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:07,107 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:41:07,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:41:07,107 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:41:07,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-13 02:41:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:08,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1951 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:41:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-13 02:41:11,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-13 02:41:15,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [640473454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:15,821 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:41:15,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-13 02:41:15,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450847901] [2021-11-13 02:41:15,822 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:15,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:41:15,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:15,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:41:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:41:15,823 INFO L87 Difference]: Start difference. First operand 1861 states and 2482 transitions. Second operand has 14 states, 14 states have (on average 17.285714285714285) internal successors, (242), 12 states have internal predecessors, (242), 4 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (47), 6 states have call predecessors, (47), 4 states have call successors, (47) [2021-11-13 02:41:20,644 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:22,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:27,175 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:29,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 02:41:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:30,276 INFO L93 Difference]: Finished difference Result 5593 states and 7803 transitions. [2021-11-13 02:41:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:41:30,277 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.285714285714285) internal successors, (242), 12 states have internal predecessors, (242), 4 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (47), 6 states have call predecessors, (47), 4 states have call successors, (47) Word has length 358 [2021-11-13 02:41:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:30,291 INFO L225 Difference]: With dead ends: 5593 [2021-11-13 02:41:30,291 INFO L226 Difference]: Without dead ends: 3735 [2021-11-13 02:41:30,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1432 GetRequests, 1410 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-11-13 02:41:30,298 INFO L933 BasicCegarLoop]: 2471 mSDtfsCounter, 873 mSDsluCounter, 19079 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 121 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12209.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1103 SdHoareTripleChecker+Valid, 21550 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.42ms SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12626.16ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:30,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1103 Valid, 21550 Invalid, 337 Unknown, 0 Unchecked, 26.42ms Time], IncrementalHoareTripleChecker [121 Valid, 212 Invalid, 4 Unknown, 0 Unchecked, 12626.16ms Time] [2021-11-13 02:41:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3735 states. [2021-11-13 02:41:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3735 to 1865. [2021-11-13 02:41:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1865 states, 1379 states have (on average 1.233502538071066) internal successors, (1701), 1404 states have internal predecessors, (1701), 376 states have call successors, (376), 103 states have call predecessors, (376), 109 states have return successors, (425), 365 states have call predecessors, (425), 365 states have call successors, (425) [2021-11-13 02:41:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1865 states to 1865 states and 2502 transitions. [2021-11-13 02:41:30,520 INFO L78 Accepts]: Start accepts. Automaton has 1865 states and 2502 transitions. Word has length 358 [2021-11-13 02:41:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:30,521 INFO L470 AbstractCegarLoop]: Abstraction has 1865 states and 2502 transitions. [2021-11-13 02:41:30,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.285714285714285) internal successors, (242), 12 states have internal predecessors, (242), 4 states have call successors, (49), 2 states have call predecessors, (49), 4 states have return successors, (47), 6 states have call predecessors, (47), 4 states have call successors, (47) [2021-11-13 02:41:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1865 states and 2502 transitions. [2021-11-13 02:41:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-11-13 02:41:30,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:30,528 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:30,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:30,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:30,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:41:30,944 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:30,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:30,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1235000648, now seen corresponding path program 1 times [2021-11-13 02:41:30,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:30,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131703083] [2021-11-13 02:41:30,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:30,947 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:30,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:30,948 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:30,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-13 02:41:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:34,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1993 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:41:34,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-13 02:41:38,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:40,466 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-13 02:41:40,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:41:40,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131703083] [2021-11-13 02:41:40,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131703083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:41:40,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1550653073] [2021-11-13 02:41:40,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:40,467 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:41:40,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:41:40,468 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:41:40,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2021-11-13 02:41:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:41:41,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1993 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 02:41:41,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:41:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-13 02:41:44,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:41:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-13 02:41:49,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1550653073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:41:49,463 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:41:49,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 20 [2021-11-13 02:41:49,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075223070] [2021-11-13 02:41:49,463 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:41:49,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 02:41:49,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:41:49,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 02:41:49,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-11-13 02:41:49,465 INFO L87 Difference]: Start difference. First operand 1865 states and 2502 transitions. Second operand has 14 states, 14 states have (on average 16.357142857142858) internal successors, (229), 12 states have internal predecessors, (229), 4 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (42), 6 states have call predecessors, (42), 4 states have call successors, (42) [2021-11-13 02:41:57,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:41:57,735 INFO L93 Difference]: Finished difference Result 5589 states and 7843 transitions. [2021-11-13 02:41:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 02:41:57,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.357142857142858) internal successors, (229), 12 states have internal predecessors, (229), 4 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (42), 6 states have call predecessors, (42), 4 states have call successors, (42) Word has length 378 [2021-11-13 02:41:57,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:41:57,749 INFO L225 Difference]: With dead ends: 5589 [2021-11-13 02:41:57,749 INFO L226 Difference]: Without dead ends: 3727 [2021-11-13 02:41:57,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1514 GetRequests, 1492 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-11-13 02:41:57,756 INFO L933 BasicCegarLoop]: 2480 mSDtfsCounter, 838 mSDsluCounter, 21606 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5965.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 24086 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.76ms SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6202.50ms IncrementalHoareTripleChecker+Time [2021-11-13 02:41:57,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 24086 Invalid, 369 Unknown, 0 Unchecked, 30.76ms Time], IncrementalHoareTripleChecker [129 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 6202.50ms Time] [2021-11-13 02:41:57,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-11-13 02:41:58,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 1861. [2021-11-13 02:41:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1377 states have (on average 1.233841684822077) internal successors, (1699), 1400 states have internal predecessors, (1699), 376 states have call successors, (376), 103 states have call predecessors, (376), 107 states have return successors, (407), 365 states have call predecessors, (407), 365 states have call successors, (407) [2021-11-13 02:41:58,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2482 transitions. [2021-11-13 02:41:58,010 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2482 transitions. Word has length 378 [2021-11-13 02:41:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:41:58,011 INFO L470 AbstractCegarLoop]: Abstraction has 1861 states and 2482 transitions. [2021-11-13 02:41:58,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.357142857142858) internal successors, (229), 12 states have internal predecessors, (229), 4 states have call successors, (44), 2 states have call predecessors, (44), 4 states have return successors, (42), 6 states have call predecessors, (42), 4 states have call successors, (42) [2021-11-13 02:41:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2482 transitions. [2021-11-13 02:41:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2021-11-13 02:41:58,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:41:58,017 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:41:58,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (41)] Forceful destruction successful, exit code 0 [2021-11-13 02:41:58,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (40)] Ended with exit code 0 [2021-11-13 02:41:58,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:41:58,419 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:41:58,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:41:58,419 INFO L85 PathProgramCache]: Analyzing trace with hash 608609258, now seen corresponding path program 1 times [2021-11-13 02:41:58,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:41:58,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979157299] [2021-11-13 02:41:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:41:58,423 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:41:58,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:41:58,424 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:41:58,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-13 02:42:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:02,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:42:02,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 02:42:07,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-13 02:42:09,594 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:09,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979157299] [2021-11-13 02:42:09,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979157299] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:42:09,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [684386821] [2021-11-13 02:42:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:09,594 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:42:09,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:42:09,595 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:42:09,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-13 02:42:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:11,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:42:11,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-13 02:42:13,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-13 02:42:16,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [684386821] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:16,053 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:42:16,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-13 02:42:16,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236745598] [2021-11-13 02:42:16,054 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:16,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 02:42:16,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 02:42:16,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-13 02:42:16,056 INFO L87 Difference]: Start difference. First operand 1861 states and 2482 transitions. Second operand has 10 states, 10 states have (on average 23.4) internal successors, (234), 8 states have internal predecessors, (234), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (42), 3 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-13 02:42:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:17,001 INFO L93 Difference]: Finished difference Result 1880 states and 2500 transitions. [2021-11-13 02:42:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 02:42:17,002 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 8 states have internal predecessors, (234), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (42), 3 states have call predecessors, (42), 1 states have call successors, (42) Word has length 390 [2021-11-13 02:42:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:17,006 INFO L225 Difference]: With dead ends: 1880 [2021-11-13 02:42:17,007 INFO L226 Difference]: Without dead ends: 1845 [2021-11-13 02:42:17,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1557 GetRequests, 1542 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-11-13 02:42:17,009 INFO L933 BasicCegarLoop]: 1185 mSDtfsCounter, 9 mSDsluCounter, 7090 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 488.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8275 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.12ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 495.30ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:17,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 8275 Invalid, 30 Unknown, 0 Unchecked, 7.12ms Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 495.30ms Time] [2021-11-13 02:42:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1845 states. [2021-11-13 02:42:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1845 to 1843. [2021-11-13 02:42:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1843 states, 1365 states have (on average 1.2322344322344323) internal successors, (1682), 1386 states have internal predecessors, (1682), 370 states have call successors, (370), 102 states have call predecessors, (370), 107 states have return successors, (404), 362 states have call predecessors, (404), 362 states have call successors, (404) [2021-11-13 02:42:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1843 states to 1843 states and 2456 transitions. [2021-11-13 02:42:17,166 INFO L78 Accepts]: Start accepts. Automaton has 1843 states and 2456 transitions. Word has length 390 [2021-11-13 02:42:17,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:17,167 INFO L470 AbstractCegarLoop]: Abstraction has 1843 states and 2456 transitions. [2021-11-13 02:42:17,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 8 states have internal predecessors, (234), 2 states have call successors, (44), 2 states have call predecessors, (44), 3 states have return successors, (42), 3 states have call predecessors, (42), 1 states have call successors, (42) [2021-11-13 02:42:17,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1843 states and 2456 transitions. [2021-11-13 02:42:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-11-13 02:42:17,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 02:42:17,176 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 02:42:17,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:17,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:17,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-13 02:42:17,585 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 02:42:17,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 02:42:17,586 INFO L85 PathProgramCache]: Analyzing trace with hash 562800605, now seen corresponding path program 1 times [2021-11-13 02:42:17,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 02:42:17,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [333744829] [2021-11-13 02:42:17,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:17,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 02:42:17,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 02:42:17,590 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 02:42:17,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-13 02:42:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:21,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 2161 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 02:42:21,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 57 proven. 6 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-11-13 02:42:26,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-11-13 02:42:29,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 02:42:29,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [333744829] [2021-11-13 02:42:29,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [333744829] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 02:42:29,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [321675318] [2021-11-13 02:42:29,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 02:42:29,582 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-13 02:42:29,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-13 02:42:29,583 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-13 02:42:29,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2021-11-13 02:42:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 02:42:31,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 2161 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 02:42:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 02:42:33,610 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-11-13 02:42:33,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 02:42:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-13 02:42:35,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [321675318] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 02:42:35,392 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-13 02:42:35,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-11-13 02:42:35,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143165107] [2021-11-13 02:42:35,393 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 02:42:35,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 02:42:35,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 02:42:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 02:42:35,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 02:42:35,395 INFO L87 Difference]: Start difference. First operand 1843 states and 2456 transitions. Second operand has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 5 states have internal predecessors, (271), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (54), 3 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-13 02:42:36,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 02:42:36,027 INFO L93 Difference]: Finished difference Result 1860 states and 2473 transitions. [2021-11-13 02:42:36,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 02:42:36,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 5 states have internal predecessors, (271), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (54), 3 states have call predecessors, (54), 2 states have call successors, (54) Word has length 430 [2021-11-13 02:42:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 02:42:36,030 INFO L225 Difference]: With dead ends: 1860 [2021-11-13 02:42:36,030 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 02:42:36,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1717 GetRequests, 1706 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 02:42:36,034 INFO L933 BasicCegarLoop]: 1171 mSDtfsCounter, 37 mSDsluCounter, 4630 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 297.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 5801 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.55ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 305.73ms IncrementalHoareTripleChecker+Time [2021-11-13 02:42:36,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 5801 Invalid, 32 Unknown, 0 Unchecked, 4.55ms Time], IncrementalHoareTripleChecker [14 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 305.73ms Time] [2021-11-13 02:42:36,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 02:42:36,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 02:42:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 02:42:36,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 02:42:36,037 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 430 [2021-11-13 02:42:36,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 02:42:36,037 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 02:42:36,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.166666666666664) internal successors, (271), 5 states have internal predecessors, (271), 2 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (54), 3 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-13 02:42:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 02:42:36,038 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 02:42:36,041 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 02:42:36,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2021-11-13 02:42:36,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-13 02:42:36,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90785a67-3396-478c-a5c4-7d3082b79cb2/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 02:42:36,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-13 02:42:44,235 WARN L227 SmtUtils]: Spent 7.57s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:42:52,540 WARN L227 SmtUtils]: Spent 6.92s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:43:00,484 WARN L227 SmtUtils]: Spent 7.12s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:43:22,705 WARN L227 SmtUtils]: Spent 20.87s on a formula simplification that was a NOOP. DAG size: 167 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:43:29,577 WARN L227 SmtUtils]: Spent 6.70s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:43:36,061 WARN L227 SmtUtils]: Spent 6.44s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:43:43,450 WARN L227 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:43:51,296 WARN L227 SmtUtils]: Spent 6.95s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:44:02,325 WARN L227 SmtUtils]: Spent 6.33s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:44:11,769 WARN L227 SmtUtils]: Spent 7.06s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:44:19,097 WARN L227 SmtUtils]: Spent 7.18s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:44:25,001 WARN L227 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:44:31,912 WARN L227 SmtUtils]: Spent 6.91s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:44:38,492 WARN L227 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:44:45,353 WARN L227 SmtUtils]: Spent 6.29s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:44:52,580 WARN L227 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:44:59,666 WARN L227 SmtUtils]: Spent 7.01s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:45:06,931 WARN L227 SmtUtils]: Spent 7.05s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:45:15,156 WARN L227 SmtUtils]: Spent 6.17s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:45:21,262 WARN L227 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:45:29,161 WARN L227 SmtUtils]: Spent 6.94s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:45:37,273 WARN L227 SmtUtils]: Spent 6.67s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:45:45,410 WARN L227 SmtUtils]: Spent 7.03s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:45:51,616 WARN L227 SmtUtils]: Spent 6.21s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:46:16,611 WARN L227 SmtUtils]: Spent 21.45s on a formula simplification that was a NOOP. DAG size: 167 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:46:22,485 WARN L227 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:46:31,467 WARN L227 SmtUtils]: Spent 5.68s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:46:37,550 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:46:43,281 WARN L227 SmtUtils]: Spent 5.73s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:46:49,865 WARN L227 SmtUtils]: Spent 5.80s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:46:56,167 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:47:02,786 WARN L227 SmtUtils]: Spent 6.28s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:47:08,854 WARN L227 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:47:15,653 WARN L227 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:47:22,123 WARN L227 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:47:28,623 WARN L227 SmtUtils]: Spent 6.18s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:47:35,655 WARN L227 SmtUtils]: Spent 5.87s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:47:41,633 WARN L227 SmtUtils]: Spent 5.98s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:47:49,834 WARN L227 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:47:57,231 WARN L227 SmtUtils]: Spent 6.41s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:48:03,409 WARN L227 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:48:11,908 WARN L227 SmtUtils]: Spent 6.27s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:48:18,199 WARN L227 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:48:24,141 WARN L227 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:48:32,434 WARN L227 SmtUtils]: Spent 5.75s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:48:38,255 WARN L227 SmtUtils]: Spent 5.82s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-13 02:48:44,981 WARN L227 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)