./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/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 75d232d8f5b5300b961fad2246cc6bf62d9846d1616b34b46b949e6c32c2a93b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:42:19,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:42:19,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:42:19,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:42:19,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:42:19,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:42:19,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:42:19,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:42:19,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:42:19,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:42:19,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:42:19,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:42:19,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:42:19,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:42:19,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:42:19,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:42:19,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:42:19,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:42:19,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:42:19,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:42:19,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:42:19,915 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:42:19,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:42:19,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:42:19,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:42:19,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:42:19,924 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:42:19,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:42:19,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:42:19,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:42:19,929 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:42:19,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:42:19,932 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:42:19,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:42:19,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:42:19,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:42:19,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:42:19,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:42:19,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:42:19,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:42:19,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:42:19,939 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:42:19,987 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:42:19,988 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:42:19,989 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:42:19,989 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:42:19,989 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:42:19,990 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:42:19,990 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:42:19,990 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:42:19,996 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:42:19,997 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:42:19,998 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:42:19,998 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:42:19,998 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:42:19,998 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:42:19,999 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:42:19,999 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:42:20,000 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:42:20,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:42:20,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:42:20,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:42:20,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:42:20,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:42:20,001 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:42:20,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:42:20,001 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:42:20,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:42:20,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:42:20,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:42:20,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:42:20,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:42:20,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:42:20,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:42:20,004 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:42:20,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:42:20,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:42:20,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:42:20,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:42:20,005 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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75d232d8f5b5300b961fad2246cc6bf62d9846d1616b34b46b949e6c32c2a93b [2021-11-12 23:42:20,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:42:20,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:42:20,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:42:20,419 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:42:20,420 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:42:20,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:42:20,484 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/data/0cd2eb64c/fe76ccf562c7483597c18faafc6e8dd4/FLAGd55de8b46 [2021-11-12 23:42:21,363 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:42:21,364 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:42:21,427 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/data/0cd2eb64c/fe76ccf562c7483597c18faafc6e8dd4/FLAGd55de8b46 [2021-11-12 23:42:21,909 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/data/0cd2eb64c/fe76ccf562c7483597c18faafc6e8dd4 [2021-11-12 23:42:21,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:42:21,912 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:42:21,914 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:21,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:42:21,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:42:21,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:21" (1/1) ... [2021-11-12 23:42:21,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190f5488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:21, skipping insertion in model container [2021-11-12 23:42:21,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:21" (1/1) ... [2021-11-12 23:42:21,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:42:22,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:42:22,937 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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i[133500,133513] [2021-11-12 23:42:22,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:42:23,034 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) [2021-11-12 23:42:23,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@12822997 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:23, skipping insertion in model container [2021-11-12 23:42:23,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:23,035 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:42:23,038 INFO L158 Benchmark]: Toolchain (without parser) took 1123.98ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 83.5MB in the beginning and 124.3MB in the end (delta: -40.8MB). Peak memory consumption was 38.9MB. Max. memory is 16.1GB. [2021-11-12 23:42:23,038 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory was 83.3MB in the beginning and 83.2MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:42:23,039 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1121.66ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 83.2MB in the beginning and 124.3MB in the end (delta: -41.2MB). Peak memory consumption was 38.9MB. Max. memory is 16.1GB. [2021-11-12 23:42:23,041 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory was 83.3MB in the beginning and 83.2MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1121.66ms. Allocated memory was 107.0MB in the beginning and 157.3MB in the end (delta: 50.3MB). Free memory was 83.2MB in the beginning and 124.3MB in the end (delta: -41.2MB). Peak memory consumption was 38.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3779]: 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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/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 75d232d8f5b5300b961fad2246cc6bf62d9846d1616b34b46b949e6c32c2a93b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:42:25,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:42:25,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:42:25,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:42:25,444 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:42:25,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:42:25,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:42:25,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:42:25,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:42:25,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:42:25,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:42:25,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:42:25,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:42:25,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:42:25,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:42:25,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:42:25,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:42:25,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:42:25,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:42:25,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:42:25,500 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:42:25,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:42:25,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:42:25,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:42:25,514 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:42:25,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:42:25,515 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:42:25,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:42:25,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:42:25,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:42:25,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:42:25,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:42:25,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:42:25,523 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:42:25,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:42:25,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:42:25,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:42:25,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:42:25,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:42:25,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:42:25,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:42:25,530 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:42:25,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:42:25,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:42:25,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:42:25,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:42:25,580 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:42:25,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:42:25,580 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:42:25,580 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:42:25,581 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:42:25,581 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:42:25,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:42:25,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:42:25,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:42:25,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:42:25,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:42:25,585 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:42:25,585 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:42:25,585 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:42:25,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:42:25,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:42:25,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:42:25,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:42:25,586 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:42:25,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:42:25,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:42:25,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:42:25,587 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:42:25,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:42:25,587 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:42:25,587 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:25,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:42:25,588 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:42:25,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:42:25,588 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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75d232d8f5b5300b961fad2246cc6bf62d9846d1616b34b46b949e6c32c2a93b [2021-11-12 23:42:26,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:42:26,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:42:26,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:42:26,046 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:42:26,046 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:42:26,048 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:42:26,118 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/data/73fa0f950/db80740636964280bd34cd7f64cacd78/FLAG50b06dc91 [2021-11-12 23:42:26,904 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:42:26,905 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:42:26,937 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/data/73fa0f950/db80740636964280bd34cd7f64cacd78/FLAG50b06dc91 [2021-11-12 23:42:26,990 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/data/73fa0f950/db80740636964280bd34cd7f64cacd78 [2021-11-12 23:42:26,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:42:26,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:42:26,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:26,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:42:27,006 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:42:27,007 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:26" (1/1) ... [2021-11-12 23:42:27,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34bc6f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:27, skipping insertion in model container [2021-11-12 23:42:27,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:42:26" (1/1) ... [2021-11-12 23:42:27,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:42:27,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:42:28,077 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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i[133500,133513] [2021-11-12 23:42:28,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:42:28,160 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:42:28,190 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:42:28,419 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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i[133500,133513] [2021-11-12 23:42:28,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:42:28,471 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:42:28,681 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_4fa3213b-e7f8-49c7-83c7-d14690a3528a/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i[133500,133513] [2021-11-12 23:42:28,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:42:28,817 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:42:28,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28 WrapperNode [2021-11-12 23:42:28,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:42:28,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:42:28,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:42:28,820 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:42:28,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (1/1) ... [2021-11-12 23:42:28,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (1/1) ... [2021-11-12 23:42:29,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:42:29,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:42:29,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:42:29,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:42:29,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (1/1) ... [2021-11-12 23:42:29,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (1/1) ... [2021-11-12 23:42:29,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (1/1) ... [2021-11-12 23:42:29,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (1/1) ... [2021-11-12 23:42:29,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (1/1) ... [2021-11-12 23:42:29,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (1/1) ... [2021-11-12 23:42:29,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (1/1) ... [2021-11-12 23:42:29,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:42:29,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:42:29,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:42:29,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:42:29,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (1/1) ... [2021-11-12 23:42:29,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:42:29,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:42:29,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:42:29,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:42:29,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:42:29,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:42:29,326 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2021-11-12 23:42:29,326 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2021-11-12 23:42:29,326 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:42:29,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:42:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:42:29,327 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:42:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2021-11-12 23:42:29,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2021-11-12 23:42:29,327 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2021-11-12 23:42:29,328 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2021-11-12 23:42:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-12 23:42:29,328 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-12 23:42:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:42:29,328 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:42:29,328 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2021-11-12 23:42:29,329 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2021-11-12 23:42:29,329 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2021-11-12 23:42:29,329 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2021-11-12 23:42:29,329 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2021-11-12 23:42:29,329 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2021-11-12 23:42:29,329 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-12 23:42:29,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-12 23:42:29,330 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:42:29,330 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:42:29,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:42:29,330 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-12 23:42:29,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-12 23:42:29,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:42:29,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:42:29,331 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_serial_data [2021-11-12 23:42:29,331 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_serial_data [2021-11-12 23:42:29,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:42:29,332 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free [2021-11-12 23:42:29,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free [2021-11-12 23:42:29,332 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2021-11-12 23:42:29,332 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2021-11-12 23:42:29,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:42:29,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:42:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 23:42:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:42:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 23:42:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 23:42:29,333 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-12 23:42:29,333 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-12 23:42:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2021-11-12 23:42:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2021-11-12 23:42:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2021-11-12 23:42:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2021-11-12 23:42:29,334 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2021-11-12 23:42:29,334 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2021-11-12 23:42:29,335 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2021-11-12 23:42:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2021-11-12 23:42:29,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:42:29,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:42:29,954 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:42:35,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:42:35,927 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:42:35,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:42:35 BoogieIcfgContainer [2021-11-12 23:42:35,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:42:35,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:42:35,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:42:35,935 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:42:35,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:42:26" (1/3) ... [2021-11-12 23:42:35,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c09b2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:42:35, skipping insertion in model container [2021-11-12 23:42:35,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:42:28" (2/3) ... [2021-11-12 23:42:35,937 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c09b2b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:42:35, skipping insertion in model container [2021-11-12 23:42:35,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:42:35" (3/3) ... [2021-11-12 23:42:35,938 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-c0cc359-1-104_1a-drivers--usb--serial--qcserial.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-12 23:42:35,944 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:42:35,944 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:42:35,996 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:42:36,003 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 [2021-11-12 23:42:36,003 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:42:36,033 INFO L276 IsEmpty]: Start isEmpty. Operand has 373 states, 283 states have (on average 1.4169611307420495) internal successors, (401), 290 states have internal predecessors, (401), 68 states have call successors, (68), 21 states have call predecessors, (68), 20 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2021-11-12 23:42:36,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:42:36,046 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:36,047 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:36,047 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:36,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:36,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1914240548, now seen corresponding path program 1 times [2021-11-12 23:42:36,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:36,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [417744802] [2021-11-12 23:42:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:36,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:36,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:36,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:36,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:42:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:37,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:42:37,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 23:42:37,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 23:42:37,834 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:37,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [417744802] [2021-11-12 23:42:37,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [417744802] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:37,836 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:37,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:42:37,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062373819] [2021-11-12 23:42:37,839 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:37,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:42:37,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:37,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:42:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:42:37,888 INFO L87 Difference]: Start difference. First operand has 373 states, 283 states have (on average 1.4169611307420495) internal successors, (401), 290 states have internal predecessors, (401), 68 states have call successors, (68), 21 states have call predecessors, (68), 20 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:42:37,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:38,003 INFO L93 Difference]: Finished difference Result 742 states and 1068 transitions. [2021-11-12 23:42:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:42:38,006 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 86 [2021-11-12 23:42:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:38,027 INFO L225 Difference]: With dead ends: 742 [2021-11-12 23:42:38,029 INFO L226 Difference]: Without dead ends: 362 [2021-11-12 23:42:38,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:42:38,046 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:38,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 8.36ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:42:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-12 23:42:38,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2021-11-12 23:42:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 278 states have (on average 1.39568345323741) internal successors, (388), 279 states have internal predecessors, (388), 63 states have call successors, (63), 20 states have call predecessors, (63), 20 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2021-11-12 23:42:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 514 transitions. [2021-11-12 23:42:38,161 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 514 transitions. Word has length 86 [2021-11-12 23:42:38,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:38,162 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 514 transitions. [2021-11-12 23:42:38,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 23:42:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 514 transitions. [2021-11-12 23:42:38,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-12 23:42:38,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:38,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:38,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:38,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:38,371 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash -983315798, now seen corresponding path program 1 times [2021-11-12 23:42:38,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:38,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429424784] [2021-11-12 23:42:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:38,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:38,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:38,386 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:38,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:42:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:39,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:42:39,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 23:42:39,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:40,247 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-12 23:42:40,247 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:40,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429424784] [2021-11-12 23:42:40,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429424784] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:42:40,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:42:40,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-12 23:42:40,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319112010] [2021-11-12 23:42:40,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:40,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:42:40,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:40,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:42:40,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:42:40,252 INFO L87 Difference]: Start difference. First operand 362 states and 514 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:42:40,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:40,351 INFO L93 Difference]: Finished difference Result 718 states and 1021 transitions. [2021-11-12 23:42:40,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:42:40,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2021-11-12 23:42:40,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:40,356 INFO L225 Difference]: With dead ends: 718 [2021-11-12 23:42:40,356 INFO L226 Difference]: Without dead ends: 363 [2021-11-12 23:42:40,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:42:40,359 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 3 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.10ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.10ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:40,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 1529 Invalid, 14 Unknown, 0 Unchecked, 9.10ms Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 48.10ms Time] [2021-11-12 23:42:40,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-12 23:42:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2021-11-12 23:42:40,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 279 states have (on average 1.3942652329749103) internal successors, (389), 280 states have internal predecessors, (389), 63 states have call successors, (63), 20 states have call predecessors, (63), 20 states have return successors, (63), 63 states have call predecessors, (63), 63 states have call successors, (63) [2021-11-12 23:42:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 515 transitions. [2021-11-12 23:42:40,403 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 515 transitions. Word has length 86 [2021-11-12 23:42:40,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:40,405 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 515 transitions. [2021-11-12 23:42:40,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-12 23:42:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 515 transitions. [2021-11-12 23:42:40,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 23:42:40,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:40,417 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:42:40,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:40,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:40,632 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:40,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash 925658353, now seen corresponding path program 1 times [2021-11-12 23:42:40,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:40,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023608698] [2021-11-12 23:42:40,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:40,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:40,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:40,642 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:40,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:42:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:41,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:41,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-12 23:42:42,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:42:42,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:42,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023608698] [2021-11-12 23:42:42,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023608698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:42,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [666284075] [2021-11-12 23:42:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:42,646 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:42,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:42,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:42,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 23:42:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:43,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:42:43,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-12 23:42:44,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-12 23:42:44,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [666284075] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:44,300 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:44,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [5, 5] total 9 [2021-11-12 23:42:44,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839512873] [2021-11-12 23:42:44,301 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:44,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:42:44,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:42:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:42:44,303 INFO L87 Difference]: Start difference. First operand 363 states and 515 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:42:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:44,352 INFO L93 Difference]: Finished difference Result 697 states and 996 transitions. [2021-11-12 23:42:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:42:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 89 [2021-11-12 23:42:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:44,361 INFO L225 Difference]: With dead ends: 697 [2021-11-12 23:42:44,361 INFO L226 Difference]: Without dead ends: 689 [2021-11-12 23:42:44,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:42:44,363 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 448 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.46ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.51ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:44,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 1074 Invalid, 5 Unknown, 0 Unchecked, 6.46ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 11.51ms Time] [2021-11-12 23:42:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2021-11-12 23:42:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 676. [2021-11-12 23:42:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 527 states have (on average 1.411764705882353) internal successors, (744), 530 states have internal predecessors, (744), 111 states have call successors, (111), 37 states have call predecessors, (111), 37 states have return successors, (111), 110 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-12 23:42:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 966 transitions. [2021-11-12 23:42:44,407 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 966 transitions. Word has length 89 [2021-11-12 23:42:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:44,408 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 966 transitions. [2021-11-12 23:42:44,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:42:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 966 transitions. [2021-11-12 23:42:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-12 23:42:44,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:44,415 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:42:44,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:44,650 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-12 23:42:44,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:44,821 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:44,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1062910541, now seen corresponding path program 1 times [2021-11-12 23:42:44,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:44,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511259792] [2021-11-12 23:42:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:44,828 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:44,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:44,829 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:44,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:42:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:46,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 2197 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:46,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:42:46,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-12 23:42:46,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:46,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511259792] [2021-11-12 23:42:46,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511259792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:46,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [898669920] [2021-11-12 23:42:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:46,873 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:46,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:46,876 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:46,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:42:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:47,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 2197 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:42:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:48,154 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-12 23:42:48,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:48,420 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-12 23:42:48,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [898669920] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:48,421 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:48,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-12 23:42:48,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504051503] [2021-11-12 23:42:48,421 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:48,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:42:48,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:48,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:42:48,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:42:48,423 INFO L87 Difference]: Start difference. First operand 676 states and 966 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 23:42:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:48,819 INFO L93 Difference]: Finished difference Result 1485 states and 2115 transitions. [2021-11-12 23:42:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:42:48,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 113 [2021-11-12 23:42:48,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:48,827 INFO L225 Difference]: With dead ends: 1485 [2021-11-12 23:42:48,828 INFO L226 Difference]: Without dead ends: 830 [2021-11-12 23:42:48,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:42:48,831 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 130 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 294.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.34ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 345.21ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:48,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 927 Invalid, 92 Unknown, 0 Unchecked, 5.34ms Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 345.21ms Time] [2021-11-12 23:42:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-11-12 23:42:48,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 825. [2021-11-12 23:42:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 653 states have (on average 1.4119448698315467) internal successors, (922), 657 states have internal predecessors, (922), 124 states have call successors, (124), 47 states have call predecessors, (124), 47 states have return successors, (124), 122 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-12 23:42:48,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1170 transitions. [2021-11-12 23:42:48,877 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1170 transitions. Word has length 113 [2021-11-12 23:42:48,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:48,878 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1170 transitions. [2021-11-12 23:42:48,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-12 23:42:48,878 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1170 transitions. [2021-11-12 23:42:48,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-12 23:42:48,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:48,884 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 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] [2021-11-12 23:42:48,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:49,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:49,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:49,295 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:49,295 INFO L85 PathProgramCache]: Analyzing trace with hash -276677993, now seen corresponding path program 1 times [2021-11-12 23:42:49,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:49,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057293815] [2021-11-12 23:42:49,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:49,298 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:49,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:49,298 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:49,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:42:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:50,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 2354 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:50,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:51,194 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 142 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:42:51,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:51,776 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-12 23:42:51,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:51,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057293815] [2021-11-12 23:42:51,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057293815] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:51,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1277242215] [2021-11-12 23:42:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:51,777 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:51,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:51,778 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:51,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:42:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:52,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 2354 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:42:52,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-12 23:42:53,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-12 23:42:53,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1277242215] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:53,859 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:53,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [5, 5] total 9 [2021-11-12 23:42:53,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032420393] [2021-11-12 23:42:53,860 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:53,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:42:53,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:53,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:42:53,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:42:53,862 INFO L87 Difference]: Start difference. First operand 825 states and 1170 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 23:42:53,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:53,923 INFO L93 Difference]: Finished difference Result 1629 states and 2313 transitions. [2021-11-12 23:42:53,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:42:53,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 174 [2021-11-12 23:42:53,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:53,931 INFO L225 Difference]: With dead ends: 1629 [2021-11-12 23:42:53,932 INFO L226 Difference]: Without dead ends: 825 [2021-11-12 23:42:53,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 685 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:42:53,937 INFO L933 BasicCegarLoop]: 498 mSDtfsCounter, 438 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.86ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:53,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 498 Invalid, 15 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 16.86ms Time] [2021-11-12 23:42:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2021-11-12 23:42:53,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 825. [2021-11-12 23:42:53,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 653 states have (on average 1.3874425727411945) internal successors, (906), 657 states have internal predecessors, (906), 124 states have call successors, (124), 47 states have call predecessors, (124), 47 states have return successors, (124), 122 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-12 23:42:53,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1154 transitions. [2021-11-12 23:42:53,995 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1154 transitions. Word has length 174 [2021-11-12 23:42:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:53,997 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1154 transitions. [2021-11-12 23:42:53,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 23:42:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1154 transitions. [2021-11-12 23:42:54,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-12 23:42:54,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:54,008 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 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] [2021-11-12 23:42:54,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:54,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-11-12 23:42:54,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:54,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:54,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:54,433 INFO L85 PathProgramCache]: Analyzing trace with hash -488759215, now seen corresponding path program 1 times [2021-11-12 23:42:54,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:54,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2083143775] [2021-11-12 23:42:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:54,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:54,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:54,436 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:54,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:42:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:55,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 2354 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:42:55,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 142 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-12 23:42:56,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-11-12 23:42:56,750 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:56,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2083143775] [2021-11-12 23:42:56,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2083143775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:42:56,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159831242] [2021-11-12 23:42:56,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:56,751 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:42:56,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:42:56,753 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:42:56,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:42:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:57,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 2354 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:42:57,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-11-12 23:42:58,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2021-11-12 23:42:58,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1159831242] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:58,404 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:42:58,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-12 23:42:58,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752179911] [2021-11-12 23:42:58,405 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:58,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:42:58,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:58,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:42:58,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:42:58,407 INFO L87 Difference]: Start difference. First operand 825 states and 1154 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:43:00,548 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 [] [2021-11-12 23:43:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:00,710 INFO L93 Difference]: Finished difference Result 2427 states and 3391 transitions. [2021-11-12 23:43:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 23:43:00,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 174 [2021-11-12 23:43:00,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:00,722 INFO L225 Difference]: With dead ends: 2427 [2021-11-12 23:43:00,722 INFO L226 Difference]: Without dead ends: 1617 [2021-11-12 23:43:00,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 684 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:43:00,726 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 474 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2159.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 2428 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.74ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2201.73ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:00,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 2428 Invalid, 19 Unknown, 0 Unchecked, 9.74ms Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 1 Unknown, 0 Unchecked, 2201.73ms Time] [2021-11-12 23:43:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-11-12 23:43:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1494. [2021-11-12 23:43:00,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1183 states have (on average 1.3947590870667794) internal successors, (1650), 1193 states have internal predecessors, (1650), 225 states have call successors, (225), 85 states have call predecessors, (225), 85 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2021-11-12 23:43:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 2100 transitions. [2021-11-12 23:43:00,823 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 2100 transitions. Word has length 174 [2021-11-12 23:43:00,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:00,824 INFO L470 AbstractCegarLoop]: Abstraction has 1494 states and 2100 transitions. [2021-11-12 23:43:00,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 23:43:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 2100 transitions. [2021-11-12 23:43:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 23:43:00,835 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:00,836 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 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] [2021-11-12 23:43:00,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:01,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:01,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:01,243 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:01,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:01,243 INFO L85 PathProgramCache]: Analyzing trace with hash 970471980, now seen corresponding path program 1 times [2021-11-12 23:43:01,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:01,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76289078] [2021-11-12 23:43:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:01,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:01,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:01,247 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:01,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:43:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:02,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 2435 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:02,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-11-12 23:43:02,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-11-12 23:43:03,546 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:03,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76289078] [2021-11-12 23:43:03,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76289078] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:03,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1296008011] [2021-11-12 23:43:03,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:03,547 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:03,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:03,548 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:03,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-12 23:43:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 2435 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:43:04,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-12 23:43:04,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-12 23:43:05,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1296008011] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:05,374 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:43:05,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-12 23:43:05,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865343517] [2021-11-12 23:43:05,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:05,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:43:05,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:43:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:43:05,376 INFO L87 Difference]: Start difference. First operand 1494 states and 2100 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:43:07,521 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 [] [2021-11-12 23:43:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:07,739 INFO L93 Difference]: Finished difference Result 2422 states and 3423 transitions. [2021-11-12 23:43:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:43:07,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 195 [2021-11-12 23:43:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:07,747 INFO L225 Difference]: With dead ends: 2422 [2021-11-12 23:43:07,747 INFO L226 Difference]: Without dead ends: 823 [2021-11-12 23:43:07,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 768 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:43:07,752 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 497 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2232.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 893 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.47ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2294.71ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:07,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 893 Invalid, 54 Unknown, 0 Unchecked, 4.47ms Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 1 Unknown, 0 Unchecked, 2294.71ms Time] [2021-11-12 23:43:07,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-11-12 23:43:07,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 757. [2021-11-12 23:43:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 601 states have (on average 1.3860232945091515) internal successors, (833), 604 states have internal predecessors, (833), 112 states have call successors, (112), 43 states have call predecessors, (112), 43 states have return successors, (112), 111 states have call predecessors, (112), 112 states have call successors, (112) [2021-11-12 23:43:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1057 transitions. [2021-11-12 23:43:07,800 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1057 transitions. Word has length 195 [2021-11-12 23:43:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:07,801 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1057 transitions. [2021-11-12 23:43:07,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-12 23:43:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1057 transitions. [2021-11-12 23:43:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-12 23:43:07,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:07,807 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:43:07,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:08,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:08,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:08,235 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:08,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1882554590, now seen corresponding path program 1 times [2021-11-12 23:43:08,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:08,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [927212273] [2021-11-12 23:43:08,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:08,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:08,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:08,239 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:08,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:43:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:09,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 2443 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:09,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:09,976 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-12 23:43:09,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-11-12 23:43:10,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:10,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [927212273] [2021-11-12 23:43:10,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [927212273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:10,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [589539120] [2021-11-12 23:43:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:10,524 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:10,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:10,525 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:10,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-12 23:43:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 2443 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:43:11,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-12 23:43:11,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-12 23:43:12,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [589539120] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:12,169 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:43:12,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-12 23:43:12,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818308931] [2021-11-12 23:43:12,169 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:12,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:43:12,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:12,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:43:12,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:43:12,171 INFO L87 Difference]: Start difference. First operand 757 states and 1057 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:43:14,327 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:16,336 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:17,050 INFO L93 Difference]: Finished difference Result 2657 states and 3762 transitions. [2021-11-12 23:43:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:43:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 197 [2021-11-12 23:43:17,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:17,064 INFO L225 Difference]: With dead ends: 2657 [2021-11-12 23:43:17,065 INFO L226 Difference]: Without dead ends: 2025 [2021-11-12 23:43:17,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 775 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:43:17,068 INFO L933 BasicCegarLoop]: 945 mSDtfsCounter, 1035 mSDsluCounter, 3227 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 65 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4593.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 4172 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.79ms SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4695.12ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:17,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 4172 Invalid, 221 Unknown, 0 Unchecked, 16.79ms Time], IncrementalHoareTripleChecker [65 Valid, 154 Invalid, 2 Unknown, 0 Unchecked, 4695.12ms Time] [2021-11-12 23:43:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2021-11-12 23:43:17,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 941. [2021-11-12 23:43:17,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 746 states have (on average 1.4021447721179625) internal successors, (1046), 750 states have internal predecessors, (1046), 141 states have call successors, (141), 53 states have call predecessors, (141), 53 states have return successors, (141), 139 states have call predecessors, (141), 141 states have call successors, (141) [2021-11-12 23:43:17,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1328 transitions. [2021-11-12 23:43:17,169 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1328 transitions. Word has length 197 [2021-11-12 23:43:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:17,170 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 1328 transitions. [2021-11-12 23:43:17,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:43:17,171 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1328 transitions. [2021-11-12 23:43:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-12 23:43:17,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:17,175 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:43:17,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:17,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:17,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:17,581 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:17,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash 294206688, now seen corresponding path program 1 times [2021-11-12 23:43:17,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:17,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1354378073] [2021-11-12 23:43:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:17,584 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:17,585 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:17,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:43:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:18,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:18,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:19,279 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-12 23:43:19,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:19,868 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-11-12 23:43:19,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:19,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1354378073] [2021-11-12 23:43:19,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1354378073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:19,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412425257] [2021-11-12 23:43:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:19,869 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:19,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:19,869 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:19,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 23:43:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:20,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 23:43:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-12 23:43:21,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2021-11-12 23:43:22,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [412425257] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:22,060 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:43:22,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [5, 5] total 19 [2021-11-12 23:43:22,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828988544] [2021-11-12 23:43:22,061 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:22,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:43:22,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:22,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:43:22,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:43:22,064 INFO L87 Difference]: Start difference. First operand 941 states and 1328 transitions. Second operand has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:43:23,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:23,551 INFO L93 Difference]: Finished difference Result 2408 states and 3596 transitions. [2021-11-12 23:43:23,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:43:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 197 [2021-11-12 23:43:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:23,566 INFO L225 Difference]: With dead ends: 2408 [2021-11-12 23:43:23,567 INFO L226 Difference]: Without dead ends: 2053 [2021-11-12 23:43:23,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 769 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-11-12 23:43:23,571 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 2808 mSDsluCounter, 6327 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 763.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2866 SdHoareTripleChecker+Valid, 7156 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.83ms SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 918.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:23,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2866 Valid, 7156 Invalid, 631 Unknown, 0 Unchecked, 27.83ms Time], IncrementalHoareTripleChecker [491 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 918.49ms Time] [2021-11-12 23:43:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-11-12 23:43:23,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 951. [2021-11-12 23:43:23,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 756 states have (on average 1.3968253968253967) internal successors, (1056), 760 states have internal predecessors, (1056), 141 states have call successors, (141), 53 states have call predecessors, (141), 53 states have return successors, (141), 139 states have call predecessors, (141), 141 states have call successors, (141) [2021-11-12 23:43:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1338 transitions. [2021-11-12 23:43:23,684 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1338 transitions. Word has length 197 [2021-11-12 23:43:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:23,684 INFO L470 AbstractCegarLoop]: Abstraction has 951 states and 1338 transitions. [2021-11-12 23:43:23,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.3076923076923075) internal successors, (95), 13 states have internal predecessors, (95), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:43:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1338 transitions. [2021-11-12 23:43:23,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-12 23:43:23,689 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:23,690 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:43:23,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:23,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:24,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:24,099 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:24,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:24,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1702280506, now seen corresponding path program 1 times [2021-11-12 23:43:24,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:24,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1623924409] [2021-11-12 23:43:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:24,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:24,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:24,103 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:24,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:43:25,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:25,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 2445 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:25,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:25,821 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 184 proven. 1 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-12 23:43:25,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-11-12 23:43:26,434 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:26,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1623924409] [2021-11-12 23:43:26,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1623924409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:26,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1505749534] [2021-11-12 23:43:26,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:26,434 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:26,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:26,435 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:26,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-12 23:43:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:27,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 2445 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:43:27,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:27,738 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-12 23:43:27,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2021-11-12 23:43:28,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1505749534] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:28,160 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:43:28,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-12 23:43:28,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217869622] [2021-11-12 23:43:28,160 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:28,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:43:28,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:28,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:43:28,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:43:28,162 INFO L87 Difference]: Start difference. First operand 951 states and 1338 transitions. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 4 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 23:43:30,301 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:31,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:31,139 INFO L93 Difference]: Finished difference Result 2097 states and 3049 transitions. [2021-11-12 23:43:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:43:31,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 4 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) Word has length 204 [2021-11-12 23:43:31,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:31,148 INFO L225 Difference]: With dead ends: 2097 [2021-11-12 23:43:31,148 INFO L226 Difference]: Without dead ends: 1271 [2021-11-12 23:43:31,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 804 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:43:31,151 INFO L933 BasicCegarLoop]: 558 mSDtfsCounter, 697 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 141 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2696.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.21ms SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2862.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:31,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 837 Invalid, 402 Unknown, 0 Unchecked, 5.21ms Time], IncrementalHoareTripleChecker [141 Valid, 260 Invalid, 1 Unknown, 0 Unchecked, 2862.66ms Time] [2021-11-12 23:43:31,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-11-12 23:43:31,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 1241. [2021-11-12 23:43:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 1054 states have (on average 1.418406072106262) internal successors, (1495), 1057 states have internal predecessors, (1495), 124 states have call successors, (124), 62 states have call predecessors, (124), 62 states have return successors, (124), 123 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-12 23:43:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1743 transitions. [2021-11-12 23:43:31,244 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1743 transitions. Word has length 204 [2021-11-12 23:43:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:31,245 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 1743 transitions. [2021-11-12 23:43:31,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 4 states have call successors, (25), 3 states have call predecessors, (25), 3 states have return successors, (25), 4 states have call predecessors, (25), 4 states have call successors, (25) [2021-11-12 23:43:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1743 transitions. [2021-11-12 23:43:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-12 23:43:31,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:31,250 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:43:31,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:31,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:31,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:43:31,665 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1693839950, now seen corresponding path program 1 times [2021-11-12 23:43:31,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:31,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619315292] [2021-11-12 23:43:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:31,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:31,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:31,669 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:31,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:43:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:32,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 2456 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 196 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-12 23:43:33,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-12 23:43:33,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:33,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619315292] [2021-11-12 23:43:33,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619315292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:33,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1385438728] [2021-11-12 23:43:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:33,861 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:33,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:33,864 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:33,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 23:43:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:36,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 2456 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:36,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 196 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-12 23:43:37,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-12 23:43:37,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1385438728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:37,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191605972] [2021-11-12 23:43:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:37,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:43:37,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:43:37,613 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:43:37,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-12 23:43:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 2456 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 23:43:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-12 23:43:42,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-12 23:43:43,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191605972] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:43,799 INFO L186 FreeRefinementEngine]: Found 2 perfect and 4 imperfect interpolant sequences. [2021-11-12 23:43:43,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5, 5, 5] total 24 [2021-11-12 23:43:43,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151440269] [2021-11-12 23:43:43,800 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:43,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-12 23:43:43,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-12 23:43:43,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-12 23:43:43,801 INFO L87 Difference]: Start difference. First operand 1241 states and 1743 transitions. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:43:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:45,645 INFO L93 Difference]: Finished difference Result 3068 states and 4405 transitions. [2021-11-12 23:43:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 23:43:45,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 203 [2021-11-12 23:43:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:45,658 INFO L225 Difference]: With dead ends: 3068 [2021-11-12 23:43:45,658 INFO L226 Difference]: Without dead ends: 1952 [2021-11-12 23:43:45,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1221 GetRequests, 1192 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-11-12 23:43:45,661 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 4349 mSDsluCounter, 5948 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 737 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 894.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4398 SdHoareTripleChecker+Valid, 6947 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.78ms SdHoareTripleChecker+Time, 737 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1058.31ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:45,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4398 Valid, 6947 Invalid, 902 Unknown, 0 Unchecked, 17.78ms Time], IncrementalHoareTripleChecker [737 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 1058.31ms Time] [2021-11-12 23:43:45,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2021-11-12 23:43:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1233. [2021-11-12 23:43:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1048 states have (on average 1.4188931297709924) internal successors, (1487), 1051 states have internal predecessors, (1487), 123 states have call successors, (123), 61 states have call predecessors, (123), 61 states have return successors, (123), 122 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-12 23:43:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 1733 transitions. [2021-11-12 23:43:45,776 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 1733 transitions. Word has length 203 [2021-11-12 23:43:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:45,776 INFO L470 AbstractCegarLoop]: Abstraction has 1233 states and 1733 transitions. [2021-11-12 23:43:45,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 23:43:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 1733 transitions. [2021-11-12 23:43:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-12 23:43:45,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:45,783 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:43:45,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:46,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:46,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:46,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:46,404 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1809080964, now seen corresponding path program 1 times [2021-11-12 23:43:46,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:46,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630103188] [2021-11-12 23:43:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:46,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:46,408 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:46,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 23:43:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:47,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 2493 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:47,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 196 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-12 23:43:48,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-12 23:43:48,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:48,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630103188] [2021-11-12 23:43:48,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630103188] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:48,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [688489182] [2021-11-12 23:43:48,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:48,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:48,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:48,701 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:48,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 23:43:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:49,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 2493 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:43:49,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-12 23:43:49,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:50,304 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-12 23:43:50,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [688489182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:43:50,304 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:43:50,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-12 23:43:50,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731131209] [2021-11-12 23:43:50,305 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:43:50,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:43:50,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:43:50,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:43:50,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-11-12 23:43:50,306 INFO L87 Difference]: Start difference. First operand 1233 states and 1733 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:43:52,442 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:54,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:43:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:43:55,396 INFO L93 Difference]: Finished difference Result 3296 states and 4571 transitions. [2021-11-12 23:43:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-12 23:43:55,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 211 [2021-11-12 23:43:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:43:55,411 INFO L225 Difference]: With dead ends: 3296 [2021-11-12 23:43:55,411 INFO L226 Difference]: Without dead ends: 2188 [2021-11-12 23:43:55,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 832 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:43:55,415 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 1140 mSDsluCounter, 3466 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 112 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4591.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 4487 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.03ms SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4704.92ms IncrementalHoareTripleChecker+Time [2021-11-12 23:43:55,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1157 Valid, 4487 Invalid, 362 Unknown, 0 Unchecked, 9.03ms Time], IncrementalHoareTripleChecker [112 Valid, 248 Invalid, 2 Unknown, 0 Unchecked, 4704.92ms Time] [2021-11-12 23:43:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2188 states. [2021-11-12 23:43:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2188 to 1237. [2021-11-12 23:43:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1052 states have (on average 1.417300380228137) internal successors, (1491), 1053 states have internal predecessors, (1491), 123 states have call successors, (123), 61 states have call predecessors, (123), 61 states have return successors, (123), 122 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-12 23:43:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1737 transitions. [2021-11-12 23:43:55,537 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1737 transitions. Word has length 211 [2021-11-12 23:43:55,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:43:55,538 INFO L470 AbstractCegarLoop]: Abstraction has 1237 states and 1737 transitions. [2021-11-12 23:43:55,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.125) internal successors, (97), 8 states have internal predecessors, (97), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 23:43:55,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1737 transitions. [2021-11-12 23:43:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-12 23:43:55,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:43:55,544 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:43:55,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:55,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 23:43:55,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:55,968 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:43:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:43:55,968 INFO L85 PathProgramCache]: Analyzing trace with hash 897538430, now seen corresponding path program 1 times [2021-11-12 23:43:55,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:43:55,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275892611] [2021-11-12 23:43:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:55,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:43:55,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:43:55,980 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:43:55,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-12 23:43:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:43:57,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 2491 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:43:57,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:43:57,609 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 196 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-12 23:43:57,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:43:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-12 23:43:58,278 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:43:58,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275892611] [2021-11-12 23:43:58,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275892611] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:43:58,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [320310235] [2021-11-12 23:43:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:43:58,278 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:43:58,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:43:58,279 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:43:58,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-12 23:44:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:01,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 2491 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:44:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:01,654 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 196 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-12 23:44:01,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-12 23:44:02,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [320310235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:02,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781746002] [2021-11-12 23:44:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:44:02,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:44:02,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:44:02,083 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:44:02,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-12 23:44:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:44:06,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 2491 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:44:06,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:44:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 196 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-12 23:44:06,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:44:07,435 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-11-12 23:44:07,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781746002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:44:07,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:44:07,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-12 23:44:07,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339697703] [2021-11-12 23:44:07,436 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:44:07,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:44:07,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:44:07,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:44:07,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:44:07,438 INFO L87 Difference]: Start difference. First operand 1237 states and 1737 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 23:44:07,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:44:07,742 INFO L93 Difference]: Finished difference Result 2459 states and 3463 transitions. [2021-11-12 23:44:07,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:44:07,742 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 211 [2021-11-12 23:44:07,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:44:07,750 INFO L225 Difference]: With dead ends: 2459 [2021-11-12 23:44:07,750 INFO L226 Difference]: Without dead ends: 1240 [2021-11-12 23:44:07,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1262 GetRequests, 1254 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:44:07,753 INFO L933 BasicCegarLoop]: 501 mSDtfsCounter, 16 mSDsluCounter, 1498 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 1999 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.53ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.27ms IncrementalHoareTripleChecker+Time [2021-11-12 23:44:07,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 1999 Invalid, 34 Unknown, 0 Unchecked, 2.53ms Time], IncrementalHoareTripleChecker [8 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 87.27ms Time] [2021-11-12 23:44:07,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-12 23:44:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1240. [2021-11-12 23:44:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1055 states have (on average 1.4161137440758294) internal successors, (1494), 1056 states have internal predecessors, (1494), 123 states have call successors, (123), 61 states have call predecessors, (123), 61 states have return successors, (123), 122 states have call predecessors, (123), 123 states have call successors, (123) [2021-11-12 23:44:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1740 transitions. [2021-11-12 23:44:07,867 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1740 transitions. Word has length 211 [2021-11-12 23:44:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:44:07,868 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1740 transitions. [2021-11-12 23:44:07,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 2 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-12 23:44:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1740 transitions. [2021-11-12 23:44:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-12 23:44:07,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:44:07,871 INFO L514 BasicCegarLoop]: trace histogram [12, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 3, 3, 3, 3, 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] [2021-11-12 23:44:07,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:08,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:08,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:08,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:08,482 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:44:08,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:44:08,483 INFO L85 PathProgramCache]: Analyzing trace with hash -74686153, now seen corresponding path program 2 times [2021-11-12 23:44:08,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:44:08,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058005669] [2021-11-12 23:44:08,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:44:08,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:44:08,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:44:08,486 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:44:08,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-12 23:44:27,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:44:27,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-12 23:44:27,228 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-12 23:44:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-12 23:44:49,346 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-12 23:44:49,347 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-12 23:44:49,348 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-12 23:44:49,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-12 23:44:49,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:44:49,567 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:44:49,570 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-12 23:44:49,668 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,669 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,669 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,669 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,670 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,670 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,670 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,671 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,671 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,671 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,678 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,678 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,679 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,679 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,679 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,679 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,680 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,680 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,680 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,680 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,682 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,682 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,682 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,683 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,683 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,683 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,684 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,685 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,686 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,686 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,686 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,686 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,687 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,687 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,687 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,688 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,688 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,688 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,688 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,689 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,690 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,690 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,690 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,691 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,691 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,691 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,692 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,692 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,692 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,693 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,693 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,693 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,694 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,694 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,694 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,694 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,695 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,695 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,695 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled [2021-11-12 23:44:49,695 WARN L418 cessorBacktranslator]: Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled [2021-11-12 23:44:49,782 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-12 23:44:49,787 INFO L158 Benchmark]: Toolchain (without parser) took 142790.25ms. Allocated memory was 60.8MB in the beginning and 325.1MB in the end (delta: 264.2MB). Free memory was 34.3MB in the beginning and 178.8MB in the end (delta: -144.4MB). Peak memory consumption was 230.3MB. Max. memory is 16.1GB. [2021-11-12 23:44:49,788 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 60.8MB. Free memory is still 41.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:44:49,788 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1819.21ms. Allocated memory was 60.8MB in the beginning and 109.1MB in the end (delta: 48.2MB). Free memory was 34.1MB in the beginning and 49.7MB in the end (delta: -15.6MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. [2021-11-12 23:44:49,789 INFO L158 Benchmark]: Boogie Procedure Inliner took 207.24ms. Allocated memory is still 109.1MB. Free memory was 49.6MB in the beginning and 59.8MB in the end (delta: -10.2MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. [2021-11-12 23:44:49,789 INFO L158 Benchmark]: Boogie Preprocessor took 203.04ms. Allocated memory is still 109.1MB. Free memory was 59.8MB in the beginning and 48.2MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-12 23:44:49,790 INFO L158 Benchmark]: RCFGBuilder took 6697.24ms. Allocated memory was 109.1MB in the beginning and 224.4MB in the end (delta: 115.3MB). Free memory was 48.2MB in the beginning and 146.9MB in the end (delta: -98.7MB). Peak memory consumption was 99.8MB. Max. memory is 16.1GB. [2021-11-12 23:44:49,791 INFO L158 Benchmark]: TraceAbstraction took 133854.98ms. Allocated memory was 224.4MB in the beginning and 325.1MB in the end (delta: 100.7MB). Free memory was 145.8MB in the beginning and 178.8MB in the end (delta: -32.9MB). Peak memory consumption was 178.2MB. Max. memory is 16.1GB. [2021-11-12 23:44:49,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 60.8MB. Free memory is still 41.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1819.21ms. Allocated memory was 60.8MB in the beginning and 109.1MB in the end (delta: 48.2MB). Free memory was 34.1MB in the beginning and 49.7MB in the end (delta: -15.6MB). Peak memory consumption was 32.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 207.24ms. Allocated memory is still 109.1MB. Free memory was 49.6MB in the beginning and 59.8MB in the end (delta: -10.2MB). Peak memory consumption was 9.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 203.04ms. Allocated memory is still 109.1MB. Free memory was 59.8MB in the beginning and 48.2MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * RCFGBuilder took 6697.24ms. Allocated memory was 109.1MB in the beginning and 224.4MB in the end (delta: 115.3MB). Free memory was 48.2MB in the beginning and 146.9MB in the end (delta: -98.7MB). Peak memory consumption was 99.8MB. Max. memory is 16.1GB. * TraceAbstraction took 133854.98ms. Allocated memory was 224.4MB in the beginning and 325.1MB in the end (delta: 100.7MB). Free memory was 145.8MB in the beginning and 178.8MB in the end (delta: -32.9MB). Peak memory consumption was 178.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#ptr#1 : $Pointer$ not handled - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Nested struct field access of VarList #Ultimate.C_memset_#res#1 : $Pointer$ not handled * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-12 23:44:49,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4fa3213b-e7f8-49c7-83c7-d14690a3528a/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null