./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/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_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/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 32bit --witnessprinter.graph.data.programhash 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:39:17,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:39:17,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:39:17,942 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:39:17,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:39:17,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:39:17,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:39:17,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:39:17,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:39:17,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:39:17,966 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:39:17,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:39:17,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:39:17,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:39:17,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:39:17,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:39:17,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:39:17,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:39:17,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:39:17,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:39:18,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:39:18,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:39:18,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:39:18,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:39:18,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:39:18,019 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:39:18,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:39:18,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:39:18,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:39:18,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:39:18,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:39:18,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:39:18,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:39:18,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:39:18,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:39:18,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:39:18,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:39:18,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:39:18,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:39:18,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:39:18,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:39:18,037 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-12 23:39:18,088 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:39:18,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:39:18,090 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:39:18,090 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:39:18,090 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:39:18,091 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:39:18,091 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:39:18,091 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:39:18,102 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:39:18,102 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:39:18,103 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:39:18,103 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:39:18,103 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:39:18,103 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:39:18,104 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:39:18,104 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:39:18,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:39:18,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:39:18,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:39:18,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:39:18,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:39:18,106 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:39:18,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:39:18,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:39:18,106 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:39:18,107 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:39:18,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:39:18,107 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:39:18,107 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:39:18,107 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:39:18,108 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:39:18,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:39:18,108 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:39:18,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:39:18,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:39:18,109 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:39:18,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:39:18,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:39:18,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:39:18,109 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:39:18,110 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_5f28fc93-19f9-43cc-85ce-329248214a35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f [2021-11-12 23:39:18,469 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:39:18,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:39:18,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:39:18,508 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:39:18,509 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:39:18,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2021-11-12 23:39:18,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/data/a07bdb120/457d5f610f44469bbb9c353091bef8dc/FLAG69d9e0800 [2021-11-12 23:39:19,476 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:39:19,476 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2021-11-12 23:39:19,506 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/data/a07bdb120/457d5f610f44469bbb9c353091bef8dc/FLAG69d9e0800 [2021-11-12 23:39:19,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/data/a07bdb120/457d5f610f44469bbb9c353091bef8dc [2021-11-12 23:39:19,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:39:19,587 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:39:19,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:39:19,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:39:19,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:39:19,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:39:19" (1/1) ... [2021-11-12 23:39:19,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1939e31e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:19, skipping insertion in model container [2021-11-12 23:39:19,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:39:19" (1/1) ... [2021-11-12 23:39:19,612 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:39:19,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:39:20,160 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_5f28fc93-19f9-43cc-85ce-329248214a35/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2021-11-12 23:39:20,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:39:20,571 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 23:39:20,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30ea90e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:20, skipping insertion in model container [2021-11-12 23:39:20,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:39:20,572 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:39:20,575 INFO L158 Benchmark]: Toolchain (without parser) took 986.29ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 46.6MB in the beginning and 72.4MB in the end (delta: -25.8MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2021-11-12 23:39:20,575 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 88.1MB. Free memory is still 65.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:39:20,576 INFO L158 Benchmark]: CACSL2BoogieTranslator took 979.75ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 46.4MB in the beginning and 72.4MB in the end (delta: -26.0MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2021-11-12 23:39:20,578 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 88.1MB. Free memory is still 65.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 979.75ms. Allocated memory was 88.1MB in the beginning and 117.4MB in the end (delta: 29.4MB). Free memory was 46.4MB in the beginning and 72.4MB in the end (delta: -26.0MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 582]: 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_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/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_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/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 32bit --witnessprinter.graph.data.programhash 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:39:23,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:39:23,348 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:39:23,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:39:23,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:39:23,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:39:23,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:39:23,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:39:23,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:39:23,454 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:39:23,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:39:23,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:39:23,460 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:39:23,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:39:23,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:39:23,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:39:23,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:39:23,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:39:23,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:39:23,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:39:23,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:39:23,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:39:23,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:39:23,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:39:23,507 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:39:23,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:39:23,509 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:39:23,511 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:39:23,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:39:23,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:39:23,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:39:23,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:39:23,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:39:23,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:39:23,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:39:23,522 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:39:23,523 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:39:23,523 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:39:23,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:39:23,526 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:39:23,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:39:23,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-12 23:39:23,590 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:39:23,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:39:23,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:39:23,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:39:23,593 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:39:23,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:39:23,594 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:39:23,594 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:39:23,594 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:39:23,595 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:39:23,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:39:23,599 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 23:39:23,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 23:39:23,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:39:23,599 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:39:23,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:39:23,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:39:23,600 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:39:23,601 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:39:23,601 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:39:23,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 23:39:23,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:39:23,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:39:23,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:39:23,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:39:23,603 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:39:23,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:39:23,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:39:23,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:39:23,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:39:23,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:39:23,604 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:39:23,605 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:39:23,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:39:23,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:39:23,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:39:23,606 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_5f28fc93-19f9-43cc-85ce-329248214a35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e3e095c3e35754b69c5b770f69d2f55696576eebdd6e61f09ab7280f663a93f [2021-11-12 23:39:24,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:39:24,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:39:24,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:39:24,085 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:39:24,086 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:39:24,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2021-11-12 23:39:24,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/data/03ed35098/13774f8ac0c64ad6980ab4ae4a593746/FLAG0aa5c8873 [2021-11-12 23:39:25,112 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:39:25,115 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c [2021-11-12 23:39:25,149 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/data/03ed35098/13774f8ac0c64ad6980ab4ae4a593746/FLAG0aa5c8873 [2021-11-12 23:39:25,197 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/data/03ed35098/13774f8ac0c64ad6980ab4ae4a593746 [2021-11-12 23:39:25,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:39:25,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:39:25,204 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:39:25,204 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:39:25,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:39:25,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:39:25" (1/1) ... [2021-11-12 23:39:25,213 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@299405ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:25, skipping insertion in model container [2021-11-12 23:39:25,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:39:25" (1/1) ... [2021-11-12 23:39:25,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:39:25,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:39:25,722 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_5f28fc93-19f9-43cc-85ce-329248214a35/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2021-11-12 23:39:26,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:39:26,109 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:39:26,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:39:26,186 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2021-11-12 23:39:26,336 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:39:26,349 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:39:26,388 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_5f28fc93-19f9-43cc-85ce-329248214a35/sv-benchmarks/c/product-lines/elevator_spec14_product23.cil.c[8585,8598] [2021-11-12 23:39:26,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:39:26,584 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:39:26,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26 WrapperNode [2021-11-12 23:39:26,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:39:26,587 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:39:26,587 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:39:26,587 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:39:26,596 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (1/1) ... [2021-11-12 23:39:26,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (1/1) ... [2021-11-12 23:39:26,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:39:26,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:39:26,730 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:39:26,730 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:39:26,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (1/1) ... [2021-11-12 23:39:26,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (1/1) ... [2021-11-12 23:39:26,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (1/1) ... [2021-11-12 23:39:26,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (1/1) ... [2021-11-12 23:39:26,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (1/1) ... [2021-11-12 23:39:26,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (1/1) ... [2021-11-12 23:39:26,837 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (1/1) ... [2021-11-12 23:39:26,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:39:26,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:39:26,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:39:26,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:39:26,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (1/1) ... [2021-11-12 23:39:26,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:39:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:39:26,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:39:26,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:39:26,969 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:39:26,969 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2021-11-12 23:39:26,986 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2021-11-12 23:39:26,988 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2021-11-12 23:39:26,988 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2021-11-12 23:39:26,988 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2021-11-12 23:39:26,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:39:26,989 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2021-11-12 23:39:26,989 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2021-11-12 23:39:26,989 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2021-11-12 23:39:26,989 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2021-11-12 23:39:26,989 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2021-11-12 23:39:26,990 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2021-11-12 23:39:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure bobCall [2021-11-12 23:39:26,990 INFO L138 BoogieDeclarations]: Found implementation of procedure bobCall [2021-11-12 23:39:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2021-11-12 23:39:26,991 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2021-11-12 23:39:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2021-11-12 23:39:26,991 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2021-11-12 23:39:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2021-11-12 23:39:26,991 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2021-11-12 23:39:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2021-11-12 23:39:26,992 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2021-11-12 23:39:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2021-11-12 23:39:26,992 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2021-11-12 23:39:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2021-11-12 23:39:26,993 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2021-11-12 23:39:26,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:39:26,993 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2021-11-12 23:39:26,993 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2021-11-12 23:39:26,993 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2021-11-12 23:39:26,994 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2021-11-12 23:39:26,994 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2021-11-12 23:39:26,995 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2021-11-12 23:39:26,995 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2021-11-12 23:39:26,995 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2021-11-12 23:39:26,996 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2021-11-12 23:39:26,996 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2021-11-12 23:39:26,996 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2021-11-12 23:39:26,996 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2021-11-12 23:39:26,997 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2021-11-12 23:39:26,997 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2021-11-12 23:39:26,997 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2021-11-12 23:39:26,997 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2021-11-12 23:39:26,997 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2021-11-12 23:39:26,998 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2021-11-12 23:39:26,998 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2021-11-12 23:39:26,999 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2021-11-12 23:39:26,999 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:39:27,000 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__weight [2021-11-12 23:39:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:39:27,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:39:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2021-11-12 23:39:27,002 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2021-11-12 23:39:31,337 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:39:31,337 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 23:39:31,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:39:31 BoogieIcfgContainer [2021-11-12 23:39:31,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:39:31,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:39:31,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:39:31,347 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:39:31,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:39:25" (1/3) ... [2021-11-12 23:39:31,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e84ba09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:39:31, skipping insertion in model container [2021-11-12 23:39:31,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:39:26" (2/3) ... [2021-11-12 23:39:31,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e84ba09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:39:31, skipping insertion in model container [2021-11-12 23:39:31,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:39:31" (3/3) ... [2021-11-12 23:39:31,351 INFO L111 eAbstractionObserver]: Analyzing ICFG elevator_spec14_product23.cil.c [2021-11-12 23:39:31,357 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:39:31,358 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:39:31,422 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:39:31,430 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 23:39:31,430 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:39:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 559 states, 433 states have (on average 1.6651270207852193) internal successors, (721), 449 states have internal predecessors, (721), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-12 23:39:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-12 23:39:31,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:31,556 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:31,557 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:31,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:31,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1816535566, now seen corresponding path program 1 times [2021-11-12 23:39:31,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:31,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050592693] [2021-11-12 23:39:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:31,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:31,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:31,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:31,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:39:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:32,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:39:32,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:32,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:33,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:33,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050592693] [2021-11-12 23:39:33,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050592693] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:33,077 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:33,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:39:33,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084864741] [2021-11-12 23:39:33,082 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:33,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:39:33,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:33,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:39:33,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:39:33,138 INFO L87 Difference]: Start difference. First operand has 559 states, 433 states have (on average 1.6651270207852193) internal successors, (721), 449 states have internal predecessors, (721), 99 states have call successors, (99), 25 states have call predecessors, (99), 25 states have return successors, (99), 97 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 23:39:33,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:33,473 INFO L93 Difference]: Finished difference Result 1113 states and 1840 transitions. [2021-11-12 23:39:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:39:33,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 103 [2021-11-12 23:39:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:33,498 INFO L225 Difference]: With dead ends: 1113 [2021-11-12 23:39:33,499 INFO L226 Difference]: Without dead ends: 554 [2021-11-12 23:39:33,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:39:33,519 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 31 mSDsluCounter, 1796 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 2697 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.92ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.07ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:33,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 2697 Invalid, 49 Unknown, 0 Unchecked, 36.92ms Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 67.07ms Time] [2021-11-12 23:39:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-12 23:39:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-11-12 23:39:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 429 states have (on average 1.6433566433566433) internal successors, (705), 444 states have internal predecessors, (705), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-12 23:39:33,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 902 transitions. [2021-11-12 23:39:33,663 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 902 transitions. Word has length 103 [2021-11-12 23:39:33,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:33,670 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 902 transitions. [2021-11-12 23:39:33,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 6 states have internal predecessors, (86), 2 states have call successors, (23), 2 states have call predecessors, (23), 4 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-12 23:39:33,671 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 902 transitions. [2021-11-12 23:39:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-12 23:39:33,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:33,703 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:33,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:33,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:33,923 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:33,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:33,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1780397082, now seen corresponding path program 1 times [2021-11-12 23:39:33,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:33,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727098598] [2021-11-12 23:39:33,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:33,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:33,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:33,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:33,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:39:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:34,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:39:34,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:34,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:35,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:35,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727098598] [2021-11-12 23:39:35,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727098598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:35,556 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:35,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2021-11-12 23:39:35,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884310146] [2021-11-12 23:39:35,557 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:35,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:39:35,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:35,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:39:35,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:39:35,561 INFO L87 Difference]: Start difference. First operand 554 states and 902 transitions. Second operand has 11 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:39:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:35,911 INFO L93 Difference]: Finished difference Result 1096 states and 1796 transitions. [2021-11-12 23:39:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:39:35,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 108 [2021-11-12 23:39:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:35,921 INFO L225 Difference]: With dead ends: 1096 [2021-11-12 23:39:35,921 INFO L226 Difference]: Without dead ends: 563 [2021-11-12 23:39:35,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:39:35,928 INFO L933 BasicCegarLoop]: 886 mSDtfsCounter, 193 mSDsluCounter, 6100 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 197.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 6986 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.36ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 224.88ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:35,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 6986 Invalid, 105 Unknown, 0 Unchecked, 20.36ms Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 224.88ms Time] [2021-11-12 23:39:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-12 23:39:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2021-11-12 23:39:35,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 437 states have (on average 1.643020594965675) internal successors, (718), 453 states have internal predecessors, (718), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 96 states have call predecessors, (99), 98 states have call successors, (99) [2021-11-12 23:39:35,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 916 transitions. [2021-11-12 23:39:35,987 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 916 transitions. Word has length 108 [2021-11-12 23:39:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:35,988 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 916 transitions. [2021-11-12 23:39:35,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:39:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 916 transitions. [2021-11-12 23:39:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-12 23:39:36,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:36,002 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:36,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:36,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:36,204 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:36,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1119714406, now seen corresponding path program 1 times [2021-11-12 23:39:36,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:36,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902641254] [2021-11-12 23:39:36,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:36,207 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:36,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:36,215 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:36,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:39:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:36,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 23:39:36,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:37,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:37,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:37,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902641254] [2021-11-12 23:39:37,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902641254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:37,478 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:37,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 23:39:37,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790202368] [2021-11-12 23:39:37,479 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:37,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:39:37,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:37,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:39:37,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 23:39:37,481 INFO L87 Difference]: Start difference. First operand 563 states and 916 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 23:39:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:37,869 INFO L93 Difference]: Finished difference Result 1152 states and 1887 transitions. [2021-11-12 23:39:37,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:39:37,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 109 [2021-11-12 23:39:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:37,881 INFO L225 Difference]: With dead ends: 1152 [2021-11-12 23:39:37,881 INFO L226 Difference]: Without dead ends: 577 [2021-11-12 23:39:37,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:39:37,890 INFO L933 BasicCegarLoop]: 847 mSDtfsCounter, 136 mSDsluCounter, 1668 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 238.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.42ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 278.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:37,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 2515 Invalid, 198 Unknown, 0 Unchecked, 9.42ms Time], IncrementalHoareTripleChecker [36 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 278.61ms Time] [2021-11-12 23:39:37,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-11-12 23:39:37,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 568. [2021-11-12 23:39:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 442 states have (on average 1.585972850678733) internal successors, (701), 457 states have internal predecessors, (701), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-12 23:39:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 898 transitions. [2021-11-12 23:39:37,954 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 898 transitions. Word has length 109 [2021-11-12 23:39:37,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:37,955 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 898 transitions. [2021-11-12 23:39:37,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 23:39:37,955 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 898 transitions. [2021-11-12 23:39:37,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-12 23:39:37,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:37,961 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:37,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:38,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:38,183 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:38,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:38,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1813012661, now seen corresponding path program 1 times [2021-11-12 23:39:38,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:38,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1217473128] [2021-11-12 23:39:38,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:38,187 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:38,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:38,188 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:38,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 23:39:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:38,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:39:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:39,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:39,596 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:39,596 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:39,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1217473128] [2021-11-12 23:39:39,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1217473128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:39,597 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:39,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-11-12 23:39:39,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13944000] [2021-11-12 23:39:39,598 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:39,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:39:39,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:39,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:39:39,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:39:39,600 INFO L87 Difference]: Start difference. First operand 568 states and 898 transitions. Second operand has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:39:39,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:39,867 INFO L93 Difference]: Finished difference Result 1094 states and 1750 transitions. [2021-11-12 23:39:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:39:39,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 111 [2021-11-12 23:39:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:39,883 INFO L225 Difference]: With dead ends: 1094 [2021-11-12 23:39:39,883 INFO L226 Difference]: Without dead ends: 556 [2021-11-12 23:39:39,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:39:39,899 INFO L933 BasicCegarLoop]: 867 mSDtfsCounter, 86 mSDsluCounter, 5047 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 5914 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.74ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 174.03ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:39,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 5914 Invalid, 80 Unknown, 0 Unchecked, 14.74ms Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 174.03ms Time] [2021-11-12 23:39:39,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-11-12 23:39:39,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 547. [2021-11-12 23:39:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 421 states have (on average 1.5985748218527316) internal successors, (673), 436 states have internal predecessors, (673), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-12 23:39:39,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 870 transitions. [2021-11-12 23:39:39,949 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 870 transitions. Word has length 111 [2021-11-12 23:39:39,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:39,950 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 870 transitions. [2021-11-12 23:39:39,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:39:39,951 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 870 transitions. [2021-11-12 23:39:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-12 23:39:39,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:39,956 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:39,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:40,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:40,171 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:40,171 INFO L85 PathProgramCache]: Analyzing trace with hash -645425913, now seen corresponding path program 1 times [2021-11-12 23:39:40,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:40,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071660478] [2021-11-12 23:39:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:40,173 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:40,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:40,174 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:40,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:39:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:40,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:39:40,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:41,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-12 23:39:41,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:41,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071660478] [2021-11-12 23:39:41,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071660478] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:39:41,812 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:39:41,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 13 [2021-11-12 23:39:41,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438702751] [2021-11-12 23:39:41,812 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:41,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:39:41,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:41,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:39:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:39:41,814 INFO L87 Difference]: Start difference. First operand 547 states and 870 transitions. Second operand has 13 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:39:42,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:42,285 INFO L93 Difference]: Finished difference Result 1063 states and 1705 transitions. [2021-11-12 23:39:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:39:42,287 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) Word has length 114 [2021-11-12 23:39:42,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:42,292 INFO L225 Difference]: With dead ends: 1063 [2021-11-12 23:39:42,293 INFO L226 Difference]: Without dead ends: 552 [2021-11-12 23:39:42,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:39:42,298 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 45 mSDsluCounter, 8211 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 279.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 9038 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.39ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 312.46ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:42,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 9038 Invalid, 224 Unknown, 0 Unchecked, 24.39ms Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 312.46ms Time] [2021-11-12 23:39:42,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-12 23:39:42,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 549. [2021-11-12 23:39:42,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 423 states have (on average 1.5933806146572105) internal successors, (674), 438 states have internal predecessors, (674), 99 states have call successors, (99), 27 states have call predecessors, (99), 26 states have return successors, (98), 96 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-12 23:39:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 871 transitions. [2021-11-12 23:39:42,330 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 871 transitions. Word has length 114 [2021-11-12 23:39:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:42,331 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 871 transitions. [2021-11-12 23:39:42,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 9.181818181818182) internal successors, (101), 11 states have internal predecessors, (101), 4 states have call successors, (23), 2 states have call predecessors, (23), 5 states have return successors, (23), 4 states have call predecessors, (23), 4 states have call successors, (23) [2021-11-12 23:39:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 871 transitions. [2021-11-12 23:39:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-12 23:39:42,336 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:42,336 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:42,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:42,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:42,554 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:42,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:42,555 INFO L85 PathProgramCache]: Analyzing trace with hash -906894235, now seen corresponding path program 1 times [2021-11-12 23:39:42,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:42,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847043697] [2021-11-12 23:39:42,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:42,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:42,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:42,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:42,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 23:39:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:43,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:39:43,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:44,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-12 23:39:44,052 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:44,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847043697] [2021-11-12 23:39:44,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847043697] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:39:44,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:39:44,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:39:44,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613923142] [2021-11-12 23:39:44,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:44,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:39:44,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:44,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:39:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:39:44,056 INFO L87 Difference]: Start difference. First operand 549 states and 871 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:39:46,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:48,095 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 23:39:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:49,289 INFO L93 Difference]: Finished difference Result 1059 states and 1726 transitions. [2021-11-12 23:39:49,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:39:49,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 115 [2021-11-12 23:39:49,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:49,297 INFO L225 Difference]: With dead ends: 1059 [2021-11-12 23:39:49,298 INFO L226 Difference]: Without dead ends: 553 [2021-11-12 23:39:49,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:39:49,305 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 803 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4961.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 2092 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.98ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5134.34ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:49,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [821 Valid, 2092 Invalid, 460 Unknown, 0 Unchecked, 11.98ms Time], IncrementalHoareTripleChecker [16 Valid, 442 Invalid, 2 Unknown, 0 Unchecked, 5134.34ms Time] [2021-11-12 23:39:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-12 23:39:49,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-12 23:39:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 426 states have (on average 1.5892018779342723) internal successors, (677), 441 states have internal predecessors, (677), 99 states have call successors, (99), 28 states have call predecessors, (99), 27 states have return successors, (99), 96 states have call predecessors, (99), 98 states have call successors, (99) [2021-11-12 23:39:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 875 transitions. [2021-11-12 23:39:49,343 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 875 transitions. Word has length 115 [2021-11-12 23:39:49,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:49,344 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 875 transitions. [2021-11-12 23:39:49,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:39:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 875 transitions. [2021-11-12 23:39:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-12 23:39:49,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:49,349 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:49,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:49,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:49,568 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash 766219231, now seen corresponding path program 1 times [2021-11-12 23:39:49,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:49,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325614975] [2021-11-12 23:39:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:49,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:49,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:49,570 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:49,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:39:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:50,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:50,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:39:50,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-12 23:39:50,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:50,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325614975] [2021-11-12 23:39:50,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325614975] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:39:50,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:39:50,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:39:50,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307333662] [2021-11-12 23:39:50,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:50,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:39:50,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:39:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:39:50,993 INFO L87 Difference]: Start difference. First operand 553 states and 875 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:39:53,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:39:55,036 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 23:39:56,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:39:56,252 INFO L93 Difference]: Finished difference Result 1068 states and 1733 transitions. [2021-11-12 23:39:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:39:56,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 118 [2021-11-12 23:39:56,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:39:56,258 INFO L225 Difference]: With dead ends: 1068 [2021-11-12 23:39:56,258 INFO L226 Difference]: Without dead ends: 558 [2021-11-12 23:39:56,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:39:56,265 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 798 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4965.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 815 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.60ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5160.63ms IncrementalHoareTripleChecker+Time [2021-11-12 23:39:56,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [815 Valid, 2093 Invalid, 462 Unknown, 0 Unchecked, 12.60ms Time], IncrementalHoareTripleChecker [14 Valid, 446 Invalid, 2 Unknown, 0 Unchecked, 5160.63ms Time] [2021-11-12 23:39:56,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-11-12 23:39:56,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 558. [2021-11-12 23:39:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 430 states have (on average 1.583720930232558) internal successors, (681), 445 states have internal predecessors, (681), 99 states have call successors, (99), 29 states have call predecessors, (99), 28 states have return successors, (100), 96 states have call predecessors, (100), 98 states have call successors, (100) [2021-11-12 23:39:56,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 880 transitions. [2021-11-12 23:39:56,303 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 880 transitions. Word has length 118 [2021-11-12 23:39:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:39:56,304 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 880 transitions. [2021-11-12 23:39:56,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:39:56,304 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 880 transitions. [2021-11-12 23:39:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-12 23:39:56,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:39:56,310 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:39:56,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:39:56,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:39:56,527 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:39:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:39:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash -35541343, now seen corresponding path program 1 times [2021-11-12 23:39:56,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:39:56,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1743776589] [2021-11-12 23:39:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:39:56,529 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:39:56,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:39:56,530 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:39:56,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 23:39:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:39:56,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:39:56,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:39:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:39:57,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:39:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-12 23:39:57,862 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:39:57,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1743776589] [2021-11-12 23:39:57,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1743776589] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:39:57,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:39:57,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:39:57,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843515013] [2021-11-12 23:39:57,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:39:57,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:39:57,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:39:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:39:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:39:57,865 INFO L87 Difference]: Start difference. First operand 558 states and 880 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:39:59,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:01,900 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 23:40:02,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:02,953 INFO L93 Difference]: Finished difference Result 1079 states and 1742 transitions. [2021-11-12 23:40:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:40:02,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 121 [2021-11-12 23:40:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:02,960 INFO L225 Difference]: With dead ends: 1079 [2021-11-12 23:40:02,961 INFO L226 Difference]: Without dead ends: 564 [2021-11-12 23:40:02,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:40:02,968 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 789 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4836.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.12ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5008.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:02,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 2093 Invalid, 461 Unknown, 0 Unchecked, 9.12ms Time], IncrementalHoareTripleChecker [12 Valid, 447 Invalid, 2 Unknown, 0 Unchecked, 5008.66ms Time] [2021-11-12 23:40:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-11-12 23:40:02,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2021-11-12 23:40:02,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 435 states have (on average 1.5770114942528735) internal successors, (686), 450 states have internal predecessors, (686), 99 states have call successors, (99), 30 states have call predecessors, (99), 29 states have return successors, (101), 96 states have call predecessors, (101), 98 states have call successors, (101) [2021-11-12 23:40:03,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 886 transitions. [2021-11-12 23:40:03,006 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 886 transitions. Word has length 121 [2021-11-12 23:40:03,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:03,007 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 886 transitions. [2021-11-12 23:40:03,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:40:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 886 transitions. [2021-11-12 23:40:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-12 23:40:03,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:03,013 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:03,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:03,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:03,233 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:03,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:03,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1250286445, now seen corresponding path program 1 times [2021-11-12 23:40:03,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:03,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146877989] [2021-11-12 23:40:03,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:03,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:03,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:03,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:03,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:40:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:03,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:40:03,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:40:04,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-12 23:40:04,555 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:04,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146877989] [2021-11-12 23:40:04,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146877989] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:04,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:04,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-11-12 23:40:04,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551977554] [2021-11-12 23:40:04,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:04,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:40:04,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:04,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:40:04,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:04,558 INFO L87 Difference]: Start difference. First operand 564 states and 886 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:40:06,595 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:08,603 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 23:40:09,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:09,697 INFO L93 Difference]: Finished difference Result 1092 states and 1753 transitions. [2021-11-12 23:40:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:40:09,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 124 [2021-11-12 23:40:09,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:09,704 INFO L225 Difference]: With dead ends: 1092 [2021-11-12 23:40:09,704 INFO L226 Difference]: Without dead ends: 571 [2021-11-12 23:40:09,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:40:09,714 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 790 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4881.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.97ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5060.13ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:09,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 2093 Invalid, 460 Unknown, 0 Unchecked, 7.97ms Time], IncrementalHoareTripleChecker [10 Valid, 448 Invalid, 2 Unknown, 0 Unchecked, 5060.13ms Time] [2021-11-12 23:40:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-12 23:40:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 571. [2021-11-12 23:40:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 441 states have (on average 1.5691609977324263) internal successors, (692), 456 states have internal predecessors, (692), 99 states have call successors, (99), 31 states have call predecessors, (99), 30 states have return successors, (102), 96 states have call predecessors, (102), 98 states have call successors, (102) [2021-11-12 23:40:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 893 transitions. [2021-11-12 23:40:09,750 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 893 transitions. Word has length 124 [2021-11-12 23:40:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:09,752 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 893 transitions. [2021-11-12 23:40:09,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 4 states have internal predecessors, (80), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 23:40:09,753 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 893 transitions. [2021-11-12 23:40:09,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-12 23:40:09,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:09,761 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:09,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:09,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:09,981 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:09,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:09,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1296975139, now seen corresponding path program 1 times [2021-11-12 23:40:09,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:09,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2045275737] [2021-11-12 23:40:09,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:09,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:09,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:09,983 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:09,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 23:40:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:40:10,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:40:10,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-12 23:40:11,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:11,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2045275737] [2021-11-12 23:40:11,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2045275737] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:11,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:11,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 13 [2021-11-12 23:40:11,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081130980] [2021-11-12 23:40:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:11,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:40:11,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:40:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:40:11,611 INFO L87 Difference]: Start difference. First operand 571 states and 893 transitions. Second operand has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:40:13,633 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 23:40:15,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:17,645 WARN L515 Checker$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 23:40:19,653 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 23:40:28,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:28,651 INFO L93 Difference]: Finished difference Result 1923 states and 3090 transitions. [2021-11-12 23:40:28,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:40:28,651 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 127 [2021-11-12 23:40:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:28,663 INFO L225 Difference]: With dead ends: 1923 [2021-11-12 23:40:28,663 INFO L226 Difference]: Without dead ends: 1395 [2021-11-12 23:40:28,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-11-12 23:40:28,670 INFO L933 BasicCegarLoop]: 1451 mSDtfsCounter, 1677 mSDsluCounter, 2727 mSDsCounter, 0 mSdLazyCounter, 5008 mSolverCounterSat, 670 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15444.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1787 SdHoareTripleChecker+Valid, 4178 SdHoareTripleChecker+Invalid, 5682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 54.17ms SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 5008 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16604.70ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:28,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1787 Valid, 4178 Invalid, 5682 Unknown, 0 Unchecked, 54.17ms Time], IncrementalHoareTripleChecker [670 Valid, 5008 Invalid, 4 Unknown, 0 Unchecked, 16604.70ms Time] [2021-11-12 23:40:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2021-11-12 23:40:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1173. [2021-11-12 23:40:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 884 states have (on average 1.5735294117647058) internal successors, (1391), 921 states have internal predecessors, (1391), 224 states have call successors, (224), 59 states have call predecessors, (224), 64 states have return successors, (249), 223 states have call predecessors, (249), 222 states have call successors, (249) [2021-11-12 23:40:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 1864 transitions. [2021-11-12 23:40:28,760 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 1864 transitions. Word has length 127 [2021-11-12 23:40:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:28,760 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 1864 transitions. [2021-11-12 23:40:28,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.333333333333334) internal successors, (84), 7 states have internal predecessors, (84), 3 states have call successors, (14), 4 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-12 23:40:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 1864 transitions. [2021-11-12 23:40:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-12 23:40:28,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:28,768 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:28,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:28,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:28,987 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:28,988 INFO L85 PathProgramCache]: Analyzing trace with hash 395691657, now seen corresponding path program 1 times [2021-11-12 23:40:28,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:28,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51592016] [2021-11-12 23:40:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:28,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:28,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:28,990 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:28,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 23:40:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:29,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 722 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:40:29,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:40:29,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:40:30,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:30,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51592016] [2021-11-12 23:40:30,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51592016] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:30,383 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:30,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 10 [2021-11-12 23:40:30,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853313618] [2021-11-12 23:40:30,384 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:30,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:40:30,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:40:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:40:30,385 INFO L87 Difference]: Start difference. First operand 1173 states and 1864 transitions. Second operand has 10 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:40:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:30,793 INFO L93 Difference]: Finished difference Result 2273 states and 3635 transitions. [2021-11-12 23:40:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 23:40:30,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) Word has length 130 [2021-11-12 23:40:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:30,807 INFO L225 Difference]: With dead ends: 2273 [2021-11-12 23:40:30,807 INFO L226 Difference]: Without dead ends: 1133 [2021-11-12 23:40:30,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:40:30,816 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 94 mSDsluCounter, 4117 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 213.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 4944 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.92ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 237.33ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:30,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 4944 Invalid, 143 Unknown, 0 Unchecked, 7.92ms Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 237.33ms Time] [2021-11-12 23:40:30,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2021-11-12 23:40:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1130. [2021-11-12 23:40:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 852 states have (on average 1.57981220657277) internal successors, (1346), 888 states have internal predecessors, (1346), 218 states have call successors, (218), 56 states have call predecessors, (218), 59 states have return successors, (236), 216 states have call predecessors, (236), 216 states have call successors, (236) [2021-11-12 23:40:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1800 transitions. [2021-11-12 23:40:30,897 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1800 transitions. Word has length 130 [2021-11-12 23:40:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:30,897 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 1800 transitions. [2021-11-12 23:40:30,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 3 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (21), 3 states have call predecessors, (21), 3 states have call successors, (21) [2021-11-12 23:40:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1800 transitions. [2021-11-12 23:40:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-12 23:40:30,903 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:30,903 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 23:40:30,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:31,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:31,119 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:31,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1023808048, now seen corresponding path program 1 times [2021-11-12 23:40:31,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:31,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [953166625] [2021-11-12 23:40:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:31,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:31,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:31,122 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:31,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:40:31,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:31,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 23:40:31,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-12 23:40:31,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:32,703 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:40:32,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:32,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [953166625] [2021-11-12 23:40:32,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [953166625] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:32,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:32,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 12 [2021-11-12 23:40:32,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588425108] [2021-11-12 23:40:32,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:32,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:40:32,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:32,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:40:32,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:40:32,706 INFO L87 Difference]: Start difference. First operand 1130 states and 1800 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:40:34,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:36,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:38,755 WARN L515 Checker$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 23:40:40,762 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 23:40:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:46,210 INFO L93 Difference]: Finished difference Result 2830 states and 4558 transitions. [2021-11-12 23:40:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 23:40:46,211 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) Word has length 135 [2021-11-12 23:40:46,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:46,229 INFO L225 Difference]: With dead ends: 2830 [2021-11-12 23:40:46,230 INFO L226 Difference]: Without dead ends: 1740 [2021-11-12 23:40:46,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:40:46,241 INFO L933 BasicCegarLoop]: 814 mSDtfsCounter, 1943 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 515 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12489.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2051 SdHoareTripleChecker+Valid, 2077 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.41ms SdHoareTripleChecker+Time, 515 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13251.80ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:46,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2051 Valid, 2077 Invalid, 3547 Unknown, 0 Unchecked, 28.41ms Time], IncrementalHoareTripleChecker [515 Valid, 3028 Invalid, 4 Unknown, 0 Unchecked, 13251.80ms Time] [2021-11-12 23:40:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2021-11-12 23:40:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1697. [2021-11-12 23:40:46,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1269 states have (on average 1.5831363278171788) internal successors, (2009), 1326 states have internal predecessors, (2009), 337 states have call successors, (337), 81 states have call predecessors, (337), 90 states have return successors, (380), 338 states have call predecessors, (380), 334 states have call successors, (380) [2021-11-12 23:40:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2726 transitions. [2021-11-12 23:40:46,365 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2726 transitions. Word has length 135 [2021-11-12 23:40:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:46,366 INFO L470 AbstractCegarLoop]: Abstraction has 1697 states and 2726 transitions. [2021-11-12 23:40:46,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 6 states have internal predecessors, (91), 3 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-12 23:40:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2726 transitions. [2021-11-12 23:40:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-12 23:40:46,399 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:46,400 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 23:40:46,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:46,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:46,613 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:46,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:46,613 INFO L85 PathProgramCache]: Analyzing trace with hash -22988392, now seen corresponding path program 1 times [2021-11-12 23:40:46,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:46,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1716510469] [2021-11-12 23:40:46,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:46,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:46,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:46,615 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:46,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 23:40:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:47,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:40:47,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:40:47,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 23:40:47,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:47,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1716510469] [2021-11-12 23:40:47,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1716510469] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:40:47,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:40:47,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-12 23:40:47,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238624765] [2021-11-12 23:40:47,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:47,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-12 23:40:47,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:47,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-12 23:40:47,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:40:47,666 INFO L87 Difference]: Start difference. First operand 1697 states and 2726 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:40:49,693 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:40:51,699 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 23:40:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:40:52,923 INFO L93 Difference]: Finished difference Result 4869 states and 7905 transitions. [2021-11-12 23:40:52,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:40:52,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 136 [2021-11-12 23:40:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:40:52,942 INFO L225 Difference]: With dead ends: 4869 [2021-11-12 23:40:52,942 INFO L226 Difference]: Without dead ends: 3212 [2021-11-12 23:40:52,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:40:52,954 INFO L933 BasicCegarLoop]: 990 mSDtfsCounter, 686 mSDsluCounter, 2311 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 23 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4945.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 696 SdHoareTripleChecker+Valid, 3301 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.14ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5091.49ms IncrementalHoareTripleChecker+Time [2021-11-12 23:40:52,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [696 Valid, 3301 Invalid, 663 Unknown, 0 Unchecked, 8.14ms Time], IncrementalHoareTripleChecker [23 Valid, 638 Invalid, 2 Unknown, 0 Unchecked, 5091.49ms Time] [2021-11-12 23:40:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2021-11-12 23:40:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 3197. [2021-11-12 23:40:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 2372 states have (on average 1.5615514333895446) internal successors, (3704), 2482 states have internal predecessors, (3704), 652 states have call successors, (652), 162 states have call predecessors, (652), 172 states have return successors, (740), 647 states have call predecessors, (740), 646 states have call successors, (740) [2021-11-12 23:40:53,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 5096 transitions. [2021-11-12 23:40:53,167 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 5096 transitions. Word has length 136 [2021-11-12 23:40:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:40:53,168 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 5096 transitions. [2021-11-12 23:40:53,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-12 23:40:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 5096 transitions. [2021-11-12 23:40:53,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-12 23:40:53,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:40:53,172 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:40:53,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:40:53,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:40:53,396 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:40:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:40:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2016124973, now seen corresponding path program 1 times [2021-11-12 23:40:53,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:40:53,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141071335] [2021-11-12 23:40:53,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:40:53,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:40:53,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:40:53,397 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:40:53,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 23:40:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:40:53,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:40:53,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:40:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-12 23:40:54,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:40:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-12 23:40:55,912 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:40:55,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141071335] [2021-11-12 23:40:55,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141071335] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:40:55,912 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:40:55,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [] total 7 [2021-11-12 23:40:55,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911294111] [2021-11-12 23:40:55,913 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:40:55,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-12 23:40:55,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:40:55,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-12 23:40:55,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:40:55,915 INFO L87 Difference]: Start difference. First operand 3197 states and 5096 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 23:40:57,935 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 23:41:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:02,958 INFO L93 Difference]: Finished difference Result 12401 states and 19981 transitions. [2021-11-12 23:41:02,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:41:02,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) Word has length 138 [2021-11-12 23:41:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:03,028 INFO L225 Difference]: With dead ends: 12401 [2021-11-12 23:41:03,028 INFO L226 Difference]: Without dead ends: 9244 [2021-11-12 23:41:03,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-12 23:41:03,046 INFO L933 BasicCegarLoop]: 1748 mSDtfsCounter, 2846 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 363 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5720.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2852 SdHoareTripleChecker+Valid, 3575 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.74ms SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6588.98ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:03,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2852 Valid, 3575 Invalid, 823 Unknown, 0 Unchecked, 11.74ms Time], IncrementalHoareTripleChecker [363 Valid, 459 Invalid, 1 Unknown, 0 Unchecked, 6588.98ms Time] [2021-11-12 23:41:03,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9244 states. [2021-11-12 23:41:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9244 to 8364. [2021-11-12 23:41:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8364 states, 6404 states have (on average 1.5730793254216116) internal successors, (10074), 6620 states have internal predecessors, (10074), 1497 states have call successors, (1497), 432 states have call predecessors, (1497), 462 states have return successors, (1844), 1412 states have call predecessors, (1844), 1479 states have call successors, (1844) [2021-11-12 23:41:04,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8364 states to 8364 states and 13415 transitions. [2021-11-12 23:41:04,013 INFO L78 Accepts]: Start accepts. Automaton has 8364 states and 13415 transitions. Word has length 138 [2021-11-12 23:41:04,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:04,013 INFO L470 AbstractCegarLoop]: Abstraction has 8364 states and 13415 transitions. [2021-11-12 23:41:04,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 5 states have call successors, (31), 4 states have call predecessors, (31), 4 states have return successors, (29), 5 states have call predecessors, (29), 5 states have call successors, (29) [2021-11-12 23:41:04,016 INFO L276 IsEmpty]: Start isEmpty. Operand 8364 states and 13415 transitions. [2021-11-12 23:41:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:41:04,021 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:04,023 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:04,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:04,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:04,236 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:04,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1044222535, now seen corresponding path program 1 times [2021-11-12 23:41:04,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:04,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250668688] [2021-11-12 23:41:04,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:04,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:04,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:04,238 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:04,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:41:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:04,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:41:04,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 23:41:05,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-12 23:41:05,536 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:05,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250668688] [2021-11-12 23:41:05,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250668688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:05,536 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:05,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 10 [2021-11-12 23:41:05,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462138170] [2021-11-12 23:41:05,537 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:05,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 23:41:05,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 23:41:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:41:05,539 INFO L87 Difference]: Start difference. First operand 8364 states and 13415 transitions. Second operand has 10 states, 10 states have (on average 15.4) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-12 23:41:07,575 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:09,583 WARN L515 Checker$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 23:41:11,587 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:13,593 WARN L515 Checker$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 23:41:16,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:16,952 INFO L93 Difference]: Finished difference Result 22313 states and 36313 transitions. [2021-11-12 23:41:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 23:41:16,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) Word has length 142 [2021-11-12 23:41:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:17,096 INFO L225 Difference]: With dead ends: 22313 [2021-11-12 23:41:17,096 INFO L226 Difference]: Without dead ends: 13989 [2021-11-12 23:41:17,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:41:17,157 INFO L933 BasicCegarLoop]: 1628 mSDtfsCounter, 1584 mSDsluCounter, 5586 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 16 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10398.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 7214 SdHoareTripleChecker+Invalid, 1905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.37ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10759.37ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:17,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1588 Valid, 7214 Invalid, 1905 Unknown, 0 Unchecked, 16.37ms Time], IncrementalHoareTripleChecker [16 Valid, 1885 Invalid, 4 Unknown, 0 Unchecked, 10759.37ms Time] [2021-11-12 23:41:17,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13989 states. [2021-11-12 23:41:17,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13989 to 13951. [2021-11-12 23:41:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13951 states, 10632 states have (on average 1.558502633559067) internal successors, (16570), 11016 states have internal predecessors, (16570), 2518 states have call successors, (2518), 726 states have call predecessors, (2518), 800 states have return successors, (3347), 2407 states have call predecessors, (3347), 2488 states have call successors, (3347) [2021-11-12 23:41:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13951 states to 13951 states and 22435 transitions. [2021-11-12 23:41:18,104 INFO L78 Accepts]: Start accepts. Automaton has 13951 states and 22435 transitions. Word has length 142 [2021-11-12 23:41:18,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:18,104 INFO L470 AbstractCegarLoop]: Abstraction has 13951 states and 22435 transitions. [2021-11-12 23:41:18,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.4) internal successors, (154), 8 states have internal predecessors, (154), 3 states have call successors, (30), 3 states have call predecessors, (30), 6 states have return successors, (29), 5 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-12 23:41:18,105 INFO L276 IsEmpty]: Start isEmpty. Operand 13951 states and 22435 transitions. [2021-11-12 23:41:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-12 23:41:18,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:18,113 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:41:18,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:18,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:18,327 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:18,327 INFO L85 PathProgramCache]: Analyzing trace with hash 551596361, now seen corresponding path program 1 times [2021-11-12 23:41:18,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:18,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628500884] [2021-11-12 23:41:18,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:18,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:18,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:18,329 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:18,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:41:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:18,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 744 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-12 23:41:18,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-12 23:41:19,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-12 23:41:19,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:19,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628500884] [2021-11-12 23:41:19,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628500884] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:41:19,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:41:19,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-11-12 23:41:19,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926567728] [2021-11-12 23:41:19,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:19,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-12 23:41:19,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:19,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-12 23:41:19,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-12 23:41:19,960 INFO L87 Difference]: Start difference. First operand 13951 states and 22435 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:41:21,979 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:23,986 WARN L515 Checker$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 23:41:25,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:27,997 WARN L515 Checker$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 23:41:30,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:41:32,010 WARN L515 Checker$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 23:41:37,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:37,456 INFO L93 Difference]: Finished difference Result 23390 states and 37401 transitions. [2021-11-12 23:41:37,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-12 23:41:37,457 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 142 [2021-11-12 23:41:37,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:37,600 INFO L225 Difference]: With dead ends: 23390 [2021-11-12 23:41:37,600 INFO L226 Difference]: Without dead ends: 14181 [2021-11-12 23:41:37,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-11-12 23:41:37,647 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 1935 mSDsluCounter, 1696 mSDsCounter, 0 mSdLazyCounter, 3999 mSolverCounterSat, 502 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16188.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2045 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 4507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.47ms SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 3999 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16826.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:37,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2045 Valid, 2500 Invalid, 4507 Unknown, 0 Unchecked, 23.47ms Time], IncrementalHoareTripleChecker [502 Valid, 3999 Invalid, 6 Unknown, 0 Unchecked, 16826.61ms Time] [2021-11-12 23:41:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14181 states. [2021-11-12 23:41:38,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14181 to 13911. [2021-11-12 23:41:38,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13911 states, 10612 states have (on average 1.5576705616283453) internal successors, (16530), 10996 states have internal predecessors, (16530), 2498 states have call successors, (2498), 726 states have call predecessors, (2498), 800 states have return successors, (3327), 2387 states have call predecessors, (3327), 2468 states have call successors, (3327) [2021-11-12 23:41:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13911 states to 13911 states and 22355 transitions. [2021-11-12 23:41:38,609 INFO L78 Accepts]: Start accepts. Automaton has 13911 states and 22355 transitions. Word has length 142 [2021-11-12 23:41:38,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:38,610 INFO L470 AbstractCegarLoop]: Abstraction has 13911 states and 22355 transitions. [2021-11-12 23:41:38,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 7 states have internal predecessors, (99), 3 states have call successors, (16), 4 states have call predecessors, (16), 6 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-12 23:41:38,610 INFO L276 IsEmpty]: Start isEmpty. Operand 13911 states and 22355 transitions. [2021-11-12 23:41:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-12 23:41:38,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:38,614 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:38,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:38,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:38,814 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:38,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:38,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1319937581, now seen corresponding path program 1 times [2021-11-12 23:41:38,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:38,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1587613729] [2021-11-12 23:41:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:38,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:38,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:38,817 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:38,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 23:41:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:39,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:41:39,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:41:39,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:41:39,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:39,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1587613729] [2021-11-12 23:41:39,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1587613729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:39,866 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:39,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-12 23:41:39,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378422176] [2021-11-12 23:41:39,867 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:39,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:41:39,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:39,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:41:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:41:39,868 INFO L87 Difference]: Start difference. First operand 13911 states and 22355 transitions. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:41:41,886 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 23:41:43,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:43,822 INFO L93 Difference]: Finished difference Result 38569 states and 63055 transitions. [2021-11-12 23:41:43,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:41:43,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 149 [2021-11-12 23:41:43,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:43,954 INFO L225 Difference]: With dead ends: 38569 [2021-11-12 23:41:43,954 INFO L226 Difference]: Without dead ends: 25001 [2021-11-12 23:41:44,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:41:44,127 INFO L933 BasicCegarLoop]: 1639 mSDtfsCounter, 1552 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2825.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1552 SdHoareTripleChecker+Valid, 2878 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.79ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2957.61ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:44,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1552 Valid, 2878 Invalid, 431 Unknown, 0 Unchecked, 5.79ms Time], IncrementalHoareTripleChecker [11 Valid, 419 Invalid, 1 Unknown, 0 Unchecked, 2957.61ms Time] [2021-11-12 23:41:44,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25001 states. [2021-11-12 23:41:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25001 to 24999. [2021-11-12 23:41:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24999 states, 19016 states have (on average 1.54906394615061) internal successors, (29457), 19730 states have internal predecessors, (29457), 4536 states have call successors, (4536), 1314 states have call predecessors, (4536), 1446 states have return successors, (6621), 4349 states have call predecessors, (6621), 4482 states have call successors, (6621) [2021-11-12 23:41:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24999 states to 24999 states and 40614 transitions. [2021-11-12 23:41:45,984 INFO L78 Accepts]: Start accepts. Automaton has 24999 states and 40614 transitions. Word has length 149 [2021-11-12 23:41:45,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:45,985 INFO L470 AbstractCegarLoop]: Abstraction has 24999 states and 40614 transitions. [2021-11-12 23:41:45,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:41:45,985 INFO L276 IsEmpty]: Start isEmpty. Operand 24999 states and 40614 transitions. [2021-11-12 23:41:45,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-12 23:41:45,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:45,991 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:46,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:46,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:46,208 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:46,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1742556614, now seen corresponding path program 1 times [2021-11-12 23:41:46,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:46,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439785207] [2021-11-12 23:41:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:46,209 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:46,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:46,210 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:46,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 23:41:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:46,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:41:46,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:41:47,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:41:47,461 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:47,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439785207] [2021-11-12 23:41:47,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439785207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:47,462 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:47,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-12 23:41:47,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031673117] [2021-11-12 23:41:47,465 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:47,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:41:47,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:47,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:41:47,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:41:47,467 INFO L87 Difference]: Start difference. First operand 24999 states and 40614 transitions. Second operand has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:41:49,486 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 23:41:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:41:52,584 INFO L93 Difference]: Finished difference Result 71651 states and 118814 transitions. [2021-11-12 23:41:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:41:52,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 150 [2021-11-12 23:41:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:41:52,813 INFO L225 Difference]: With dead ends: 71651 [2021-11-12 23:41:52,813 INFO L226 Difference]: Without dead ends: 47237 [2021-11-12 23:41:52,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:41:52,947 INFO L933 BasicCegarLoop]: 1648 mSDtfsCounter, 1560 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2739.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1560 SdHoareTripleChecker+Valid, 2894 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.79ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2868.77ms IncrementalHoareTripleChecker+Time [2021-11-12 23:41:52,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1560 Valid, 2894 Invalid, 433 Unknown, 0 Unchecked, 5.79ms Time], IncrementalHoareTripleChecker [11 Valid, 421 Invalid, 1 Unknown, 0 Unchecked, 2868.77ms Time] [2021-11-12 23:41:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47237 states. [2021-11-12 23:41:55,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47237 to 47235. [2021-11-12 23:41:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47235 states, 35872 states have (on average 1.5428189116859947) internal successors, (55344), 37246 states have internal predecessors, (55344), 8624 states have call successors, (8624), 2490 states have call predecessors, (8624), 2738 states have return successors, (14196), 8285 states have call predecessors, (14196), 8522 states have call successors, (14196) [2021-11-12 23:41:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47235 states to 47235 states and 78164 transitions. [2021-11-12 23:41:56,307 INFO L78 Accepts]: Start accepts. Automaton has 47235 states and 78164 transitions. Word has length 150 [2021-11-12 23:41:56,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:41:56,308 INFO L470 AbstractCegarLoop]: Abstraction has 47235 states and 78164 transitions. [2021-11-12 23:41:56,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.5) internal successors, (174), 4 states have internal predecessors, (174), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:41:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 47235 states and 78164 transitions. [2021-11-12 23:41:56,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-12 23:41:56,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:41:56,314 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:41:56,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:41:56,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:41:56,531 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:41:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:41:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2065574354, now seen corresponding path program 1 times [2021-11-12 23:41:56,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:41:56,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765164214] [2021-11-12 23:41:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:41:56,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:41:56,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:41:56,533 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:41:56,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:41:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:41:56,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 23:41:57,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:41:57,370 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:41:57,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:41:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:41:57,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:41:57,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765164214] [2021-11-12 23:41:57,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765164214] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:41:57,643 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:41:57,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 4] imperfect sequences [] total 4 [2021-11-12 23:41:57,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608200251] [2021-11-12 23:41:57,643 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:41:57,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 23:41:57,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:41:57,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 23:41:57,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:41:57,644 INFO L87 Difference]: Start difference. First operand 47235 states and 78164 transitions. Second operand has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:41:59,670 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:06,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:06,186 INFO L93 Difference]: Finished difference Result 137935 states and 234087 transitions. [2021-11-12 23:42:06,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 23:42:06,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) Word has length 151 [2021-11-12 23:42:06,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:06,687 INFO L225 Difference]: With dead ends: 137935 [2021-11-12 23:42:06,687 INFO L226 Difference]: Without dead ends: 91769 [2021-11-12 23:42:07,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 23:42:07,146 INFO L933 BasicCegarLoop]: 1657 mSDtfsCounter, 1568 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2789.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 2910 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.18ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3102.67ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:07,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 2910 Invalid, 435 Unknown, 0 Unchecked, 6.18ms Time], IncrementalHoareTripleChecker [11 Valid, 423 Invalid, 1 Unknown, 0 Unchecked, 3102.67ms Time] [2021-11-12 23:42:07,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91769 states. [2021-11-12 23:42:11,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91769 to 91767. [2021-11-12 23:42:11,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91767 states, 69632 states have (on average 1.5377843520220589) internal successors, (107079), 72326 states have internal predecessors, (107079), 16812 states have call successors, (16812), 4842 states have call predecessors, (16812), 5322 states have return successors, (32343), 16169 states have call predecessors, (32343), 16614 states have call successors, (32343) [2021-11-12 23:42:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91767 states to 91767 states and 156234 transitions. [2021-11-12 23:42:13,430 INFO L78 Accepts]: Start accepts. Automaton has 91767 states and 156234 transitions. Word has length 151 [2021-11-12 23:42:13,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:42:13,431 INFO L470 AbstractCegarLoop]: Abstraction has 91767 states and 156234 transitions. [2021-11-12 23:42:13,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.0) internal successors, (176), 4 states have internal predecessors, (176), 4 states have call successors, (30), 3 states have call predecessors, (30), 4 states have return successors, (29), 4 states have call predecessors, (29), 4 states have call successors, (29) [2021-11-12 23:42:13,432 INFO L276 IsEmpty]: Start isEmpty. Operand 91767 states and 156234 transitions. [2021-11-12 23:42:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-12 23:42:13,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:42:13,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:42:13,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 23:42:13,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:42:13,655 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:42:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:42:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash -195765439, now seen corresponding path program 1 times [2021-11-12 23:42:13,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:42:13,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610163485] [2021-11-12 23:42:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:42:13,657 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:42:13,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:42:13,658 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:42:13,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f28fc93-19f9-43cc-85ce-329248214a35/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 23:42:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:42:14,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 23:42:14,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:42:14,575 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-12 23:42:14,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:42:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-12 23:42:15,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:42:15,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610163485] [2021-11-12 23:42:15,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610163485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:42:15,617 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:42:15,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 8] imperfect sequences [] total 13 [2021-11-12 23:42:15,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659530865] [2021-11-12 23:42:15,618 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:42:15,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 23:42:15,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:42:15,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 23:42:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-12 23:42:15,619 INFO L87 Difference]: Start difference. First operand 91767 states and 156234 transitions. Second operand has 13 states, 13 states have (on average 13.692307692307692) internal successors, (178), 13 states have internal predecessors, (178), 7 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2021-11-12 23:42:17,638 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 23:42:19,644 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:42:21,650 WARN L515 Checker$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 23:42:23,655 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 23:42:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:42:34,500 INFO L93 Difference]: Finished difference Result 216915 states and 366839 transitions. [2021-11-12 23:42:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 23:42:34,501 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 13.692307692307692) internal successors, (178), 13 states have internal predecessors, (178), 7 states have call successors, (30), 3 states have call predecessors, (30), 7 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 152 [2021-11-12 23:42:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:42:35,243 INFO L225 Difference]: With dead ends: 216915 [2021-11-12 23:42:35,243 INFO L226 Difference]: Without dead ends: 156453 [2021-11-12 23:42:35,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-12 23:42:36,005 INFO L933 BasicCegarLoop]: 943 mSDtfsCounter, 1212 mSDsluCounter, 3666 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 107 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9428.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 4609 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.59ms SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9641.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:42:36,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 4609 Invalid, 1207 Unknown, 0 Unchecked, 10.59ms Time], IncrementalHoareTripleChecker [107 Valid, 1096 Invalid, 4 Unknown, 0 Unchecked, 9641.69ms Time] [2021-11-12 23:42:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156453 states.