./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/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_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:49:49,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:49:49,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:49:49,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:49:49,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:49:49,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:49:49,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:49:49,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:49:49,536 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:49:49,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:49:49,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:49:49,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:49:49,545 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:49:49,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:49:49,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:49:49,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:49:49,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:49:49,556 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:49:49,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:49:49,566 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:49:49,568 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:49:49,569 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:49:49,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:49:49,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:49:49,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:49:49,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:49:49,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:49:49,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:49:49,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:49:49,582 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:49:49,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:49:49,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:49:49,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:49:49,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:49:49,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:49:49,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:49:49,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:49:49,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:49:49,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:49:49,590 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:49:49,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:49:49,591 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-12 22:49:49,615 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:49:49,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:49:49,616 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:49:49,616 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:49:49,617 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:49:49,617 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:49:49,617 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:49:49,617 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:49:49,617 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:49:49,618 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:49:49,618 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:49:49,618 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:49:49,618 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:49:49,618 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:49:49,618 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:49:49,619 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:49:49,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 22:49:49,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 22:49:49,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:49:49,620 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:49:49,620 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 22:49:49,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:49:49,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:49:49,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:49:49,621 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 22:49:49,621 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 22:49:49,621 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-12 22:49:49,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:49:49,622 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:49:49,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:49:49,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:49:49,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:49:49,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:49:49,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:49,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:49:49,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:49:49,623 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:49:49,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:49:49,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:49:49,624 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:49:49,624 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_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2021-11-12 22:49:49,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:49:49,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:49:49,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:49:49,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:49:49,914 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:49:49,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-12 22:49:49,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/data/ceda63f38/51e435250ed14ababa0278092fcc4e48/FLAG106a8c7ae [2021-11-12 22:49:50,484 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:49:50,485 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-12 22:49:50,502 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/data/ceda63f38/51e435250ed14ababa0278092fcc4e48/FLAG106a8c7ae [2021-11-12 22:49:51,001 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/data/ceda63f38/51e435250ed14ababa0278092fcc4e48 [2021-11-12 22:49:51,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:49:51,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:49:51,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:51,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:49:51,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:49:51,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:51,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444f9785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51, skipping insertion in model container [2021-11-12 22:49:51,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:51" (1/1) ... [2021-11-12 22:49:51,023 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:49:51,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:51,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:51,430 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 22:49:51,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b775900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:51, skipping insertion in model container [2021-11-12 22:49:51,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:51,432 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:49:51,435 INFO L158 Benchmark]: Toolchain (without parser) took 425.18ms. Allocated memory is still 113.2MB. Free memory was 77.8MB in the beginning and 86.6MB in the end (delta: -8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:49:51,436 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 77.6MB. Free memory was 33.5MB in the beginning and 33.4MB in the end (delta: 37.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:49:51,438 INFO L158 Benchmark]: CACSL2BoogieTranslator took 422.01ms. Allocated memory is still 113.2MB. Free memory was 77.6MB in the beginning and 86.6MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-12 22:49:51,441 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 77.6MB. Free memory was 33.5MB in the beginning and 33.4MB in the end (delta: 37.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 422.01ms. Allocated memory is still 113.2MB. Free memory was 77.6MB in the beginning and 86.6MB in the end (delta: -9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 529]: 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_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/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_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:49:53,645 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:49:53,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:49:53,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:49:53,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:49:53,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:49:53,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:49:53,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:49:53,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:49:53,691 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:49:53,692 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:49:53,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:49:53,694 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:49:53,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:49:53,697 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:49:53,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:49:53,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:49:53,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:49:53,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:49:53,715 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:49:53,717 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:49:53,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:49:53,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:49:53,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:49:53,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:49:53,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:49:53,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:49:53,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:49:53,730 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:49:53,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:49:53,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:49:53,733 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:49:53,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:49:53,734 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:49:53,741 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:49:53,742 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:49:53,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:49:53,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:49:53,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:49:53,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:49:53,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:49:53,749 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-12 22:49:53,799 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:49:53,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:49:53,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:49:53,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:49:53,800 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:49:53,801 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:49:53,801 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:49:53,801 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:49:53,801 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:49:53,801 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:49:53,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-12 22:49:53,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-12 22:49:53,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:49:53,803 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-12 22:49:53,803 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-12 22:49:53,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:49:53,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-12 22:49:53,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:49:53,806 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-12 22:49:53,806 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-12 22:49:53,806 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-12 22:49:53,806 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:49:53,807 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:49:53,807 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:49:53,807 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:49:53,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-12 22:49:53,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:49:53,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:49:53,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:49:53,809 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:49:53,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:53,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:49:53,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:49:53,810 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:49:53,810 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:49:53,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:49:53,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:49:53,812 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_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c01598788c0e593641b4d52eb46aec8832108f2ffb3b67e30286093c8a1926f8 [2021-11-12 22:49:54,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:49:54,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:49:54,230 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:49:54,231 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:49:54,234 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:49:54,235 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-12 22:49:54,311 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/data/ed9e89f95/d48d931f191c43d3ac4e46110ca3f193/FLAG77e80d020 [2021-11-12 22:49:54,888 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:49:54,889 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/sv-benchmarks/c/array-memsafety/array01-alloca-2.i [2021-11-12 22:49:54,906 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/data/ed9e89f95/d48d931f191c43d3ac4e46110ca3f193/FLAG77e80d020 [2021-11-12 22:49:55,167 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/data/ed9e89f95/d48d931f191c43d3ac4e46110ca3f193 [2021-11-12 22:49:55,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:49:55,175 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:49:55,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:55,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:49:55,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:49:55,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d819ff3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55, skipping insertion in model container [2021-11-12 22:49:55,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:49:55,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:55,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:55,599 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:49:55,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:49:55,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:55,680 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:49:55,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:49:55,744 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:49:55,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55 WrapperNode [2021-11-12 22:49:55,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:49:55,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:55,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:49:55,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:49:55,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,792 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:49:55,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:49:55,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:49:55,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:49:55,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:49:55,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:49:55,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:49:55,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:49:55,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (1/1) ... [2021-11-12 22:49:55,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:49:55,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:49:55,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:49:55,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:49:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:49:55,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:49:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:49:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:49:55,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:49:55,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:49:56,388 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:49:56,388 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-12 22:49:56,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:56 BoogieIcfgContainer [2021-11-12 22:49:56,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:49:56,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:49:56,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:49:56,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:49:56,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:49:55" (1/3) ... [2021-11-12 22:49:56,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669a76d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:49:56, skipping insertion in model container [2021-11-12 22:49:56,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:49:55" (2/3) ... [2021-11-12 22:49:56,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@669a76d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:49:56, skipping insertion in model container [2021-11-12 22:49:56,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:49:56" (3/3) ... [2021-11-12 22:49:56,398 INFO L111 eAbstractionObserver]: Analyzing ICFG array01-alloca-2.i [2021-11-12 22:49:56,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:49:56,403 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-12 22:49:56,448 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:49:56,455 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 22:49:56,455 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-12 22:49:56,470 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 22:49:56,476 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:56,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 22:49:56,477 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:49:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2021-11-12 22:49:56,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:49:56,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178865488] [2021-11-12 22:49:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:56,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:49:56,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:49:56,499 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:49:56,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:49:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:56,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:49:56,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:49:56,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:49:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:56,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:49:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:56,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:49:56,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178865488] [2021-11-12 22:49:56,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178865488] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:56,762 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:56,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 22:49:56,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896639541] [2021-11-12 22:49:56,765 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:56,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:49:56,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:49:56,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:49:56,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:56,815 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:56,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:56,913 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-12 22:49:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:49:56,917 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-12 22:49:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:56,925 INFO L225 Difference]: With dead ends: 30 [2021-11-12 22:49:56,926 INFO L226 Difference]: Without dead ends: 28 [2021-11-12 22:49:56,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:49:56,932 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:56,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 15 Unknown, 0 Unchecked, 2.09ms Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 78.97ms Time] [2021-11-12 22:49:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-12 22:49:56,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-12 22:49:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.55) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:56,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-12 22:49:56,974 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2021-11-12 22:49:56,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:56,975 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-12 22:49:56,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:56,975 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-12 22:49:56,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-12 22:49:56,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:56,976 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-12 22:49:57,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:49:57,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:49:57,200 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:49:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash 889508874, now seen corresponding path program 1 times [2021-11-12 22:49:57,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:49:57,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1982580141] [2021-11-12 22:49:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:57,203 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:49:57,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:49:57,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:49:57,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:49:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 22:49:57,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:49:57,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:49:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:57,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:49:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:57,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:49:57,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1982580141] [2021-11-12 22:49:57,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1982580141] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:57,578 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:57,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-12 22:49:57,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712038492] [2021-11-12 22:49:57,578 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:57,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:49:57,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:49:57,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:49:57,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:49:57,580 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:58,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:58,173 INFO L93 Difference]: Finished difference Result 78 states and 85 transitions. [2021-11-12 22:49:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:49:58,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-12 22:49:58,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:58,177 INFO L225 Difference]: With dead ends: 78 [2021-11-12 22:49:58,177 INFO L226 Difference]: Without dead ends: 78 [2021-11-12 22:49:58,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:49:58,179 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 103 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 350.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.30ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 395.38ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:58,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 102 Invalid, 72 Unknown, 0 Unchecked, 4.30ms Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 395.38ms Time] [2021-11-12 22:49:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-12 22:49:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 32. [2021-11-12 22:49:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-11-12 22:49:58,187 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2021-11-12 22:49:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:58,188 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-11-12 22:49:58,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:58,188 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-11-12 22:49:58,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:49:58,189 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:58,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:58,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 22:49:58,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:49:58,409 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:49:58,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:58,410 INFO L85 PathProgramCache]: Analyzing trace with hash 176742583, now seen corresponding path program 1 times [2021-11-12 22:49:58,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:49:58,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619365300] [2021-11-12 22:49:58,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:58,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:49:58,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:49:58,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:49:58,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:49:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:58,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:49:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:49:58,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:49:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:58,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:49:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:58,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:49:58,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619365300] [2021-11-12 22:49:58,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619365300] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:58,560 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:58,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:49:58,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823971653] [2021-11-12 22:49:58,561 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:58,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:49:58,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:49:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:49:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:49:58,562 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:58,659 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-11-12 22:49:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:49:58,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 22:49:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:58,662 INFO L225 Difference]: With dead ends: 29 [2021-11-12 22:49:58,662 INFO L226 Difference]: Without dead ends: 29 [2021-11-12 22:49:58,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:49:58,664 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.13ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.76ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:58,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 1.13ms Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 84.76ms Time] [2021-11-12 22:49:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-12 22:49:58,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-12 22:49:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.375) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-11-12 22:49:58,671 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 8 [2021-11-12 22:49:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:58,672 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-11-12 22:49:58,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:58,672 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-11-12 22:49:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-12 22:49:58,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:58,673 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:58,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:49:58,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:49:58,884 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:49:58,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:49:58,885 INFO L85 PathProgramCache]: Analyzing trace with hash 176742584, now seen corresponding path program 1 times [2021-11-12 22:49:58,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:49:58,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1110993417] [2021-11-12 22:49:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:49:58,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:49:58,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:49:58,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:49:58,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:49:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:49:58,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:49:58,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:49:58,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:49:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:59,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:49:59,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:49:59,423 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:49:59,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1110993417] [2021-11-12 22:49:59,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1110993417] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:49:59,424 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:49:59,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-12 22:49:59,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939496014] [2021-11-12 22:49:59,425 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:49:59,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:49:59,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:49:59,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:49:59,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:49:59,426 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:59,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:49:59,853 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-11-12 22:49:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:49:59,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-12 22:49:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:49:59,856 INFO L225 Difference]: With dead ends: 35 [2021-11-12 22:49:59,856 INFO L226 Difference]: Without dead ends: 35 [2021-11-12 22:49:59,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:49:59,858 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 232.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.20ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 260.63ms IncrementalHoareTripleChecker+Time [2021-11-12 22:49:59,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 34 Invalid, 52 Unknown, 0 Unchecked, 2.20ms Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 260.63ms Time] [2021-11-12 22:49:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-12 22:49:59,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2021-11-12 22:49:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-12 22:49:59,863 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2021-11-12 22:49:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:49:59,863 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-12 22:49:59,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:49:59,863 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-12 22:49:59,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 22:49:59,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:49:59,864 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:49:59,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:00,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:00,068 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:50:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1091210163, now seen corresponding path program 1 times [2021-11-12 22:50:00,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:00,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529417250] [2021-11-12 22:50:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:00,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:00,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:00,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:00,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:50:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:00,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:50:00,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:00,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:00,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:00,259 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:00,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529417250] [2021-11-12 22:50:00,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529417250] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:00,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1982412731] [2021-11-12 22:50:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:00,260 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:00,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:00,263 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:00,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 22:50:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:00,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:50:00,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:00,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:00,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:00,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:00,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1982412731] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:00,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375531995] [2021-11-12 22:50:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:00,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:00,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:00,494 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:50:00,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-12 22:50:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:50:00,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:00,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:00,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375531995] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:00,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:50:00,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-12 22:50:00,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799294185] [2021-11-12 22:50:00,634 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:50:00,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:50:00,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:50:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:50:00,635 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:00,706 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-12 22:50:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:50:00,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 22:50:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:00,708 INFO L225 Difference]: With dead ends: 49 [2021-11-12 22:50:00,708 INFO L226 Difference]: Without dead ends: 49 [2021-11-12 22:50:00,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:50:00,709 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.16ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 63.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:00,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 104 Invalid, 44 Unknown, 0 Unchecked, 1.16ms Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 63.94ms Time] [2021-11-12 22:50:00,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-12 22:50:00,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2021-11-12 22:50:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:00,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-11-12 22:50:00,714 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2021-11-12 22:50:00,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:00,715 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-11-12 22:50:00,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:00,715 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-11-12 22:50:00,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-12 22:50:00,715 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:00,716 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:00,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:00,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-11-12 22:50:01,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:01,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:01,327 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:50:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2021-11-12 22:50:01,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:01,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [336458545] [2021-11-12 22:50:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:01,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:01,329 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:01,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:50:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-12 22:50:01,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:01,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:01,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:02,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:02,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [336458545] [2021-11-12 22:50:02,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [336458545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:02,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [714683651] [2021-11-12 22:50:02,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:02,204 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:02,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:02,205 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:02,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-12 22:50:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:02,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:02,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:02,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:02,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [714683651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:02,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583352502] [2021-11-12 22:50:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:02,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:02,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:02,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:50:02,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-12 22:50:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:02,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:02,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:02,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:02,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:03,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:03,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583352502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:03,232 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:50:03,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2021-11-12 22:50:03,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709661875] [2021-11-12 22:50:03,233 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:50:03,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-12 22:50:03,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:03,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-12 22:50:03,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-12 22:50:03,234 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:03,618 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2021-11-12 22:50:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-12 22:50:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-12 22:50:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:03,624 INFO L225 Difference]: With dead ends: 57 [2021-11-12 22:50:03,624 INFO L226 Difference]: Without dead ends: 57 [2021-11-12 22:50:03,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:50:03,625 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 293.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.82ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 325.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:03,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 65 Invalid, 73 Unknown, 0 Unchecked, 1.82ms Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 5 Unchecked, 325.94ms Time] [2021-11-12 22:50:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-12 22:50:03,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2021-11-12 22:50:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.236842105263158) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:03,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-11-12 22:50:03,630 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 10 [2021-11-12 22:50:03,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:03,631 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-11-12 22:50:03,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:03,631 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-11-12 22:50:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-12 22:50:03,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:03,636 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:03,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:03,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:04,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:04,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:04,237 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:50:04,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:04,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1604227594, now seen corresponding path program 1 times [2021-11-12 22:50:04,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:04,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270160045] [2021-11-12 22:50:04,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:04,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:04,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:04,238 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:04,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:50:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:04,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:50:04,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:04,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:04,396 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:04,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270160045] [2021-11-12 22:50:04,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270160045] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:04,396 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:04,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-12 22:50:04,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688205174] [2021-11-12 22:50:04,396 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:04,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:50:04,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:04,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:50:04,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:50:04,397 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:04,521 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2021-11-12 22:50:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:50:04,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-12 22:50:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:04,523 INFO L225 Difference]: With dead ends: 64 [2021-11-12 22:50:04,523 INFO L226 Difference]: Without dead ends: 64 [2021-11-12 22:50:04,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-12 22:50:04,524 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 79.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.86ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:04,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 60 Invalid, 49 Unknown, 0 Unchecked, 0.86ms Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 93.94ms Time] [2021-11-12 22:50:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-12 22:50:04,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2021-11-12 22:50:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:04,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-12 22:50:04,529 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 14 [2021-11-12 22:50:04,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:04,530 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-12 22:50:04,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:04,530 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-12 22:50:04,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 22:50:04,531 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:04,531 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:04,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:04,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:04,736 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:50:04,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:04,736 INFO L85 PathProgramCache]: Analyzing trace with hash 265956368, now seen corresponding path program 1 times [2021-11-12 22:50:04,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:04,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1358854555] [2021-11-12 22:50:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:04,737 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:04,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:04,738 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:04,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:50:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:04,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:50:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:04,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:04,945 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:04,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1358854555] [2021-11-12 22:50:04,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1358854555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:04,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [499060599] [2021-11-12 22:50:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:04,946 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:04,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:04,948 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:04,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 22:50:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:05,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:50:05,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:05,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:05,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [499060599] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:05,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880908373] [2021-11-12 22:50:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:05,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:05,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:05,168 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:50:05,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 22:50:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:05,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:50:05,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:05,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:05,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880908373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:05,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:50:05,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-12 22:50:05,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809811860] [2021-11-12 22:50:05,341 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:50:05,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:50:05,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:05,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:50:05,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:50:05,344 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:05,447 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-11-12 22:50:05,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:50:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-12 22:50:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:05,449 INFO L225 Difference]: With dead ends: 55 [2021-11-12 22:50:05,449 INFO L226 Difference]: Without dead ends: 55 [2021-11-12 22:50:05,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:50:05,450 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.93ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:05,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 69 Invalid, 48 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 81.93ms Time] [2021-11-12 22:50:05,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-12 22:50:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2021-11-12 22:50:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-11-12 22:50:05,461 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 16 [2021-11-12 22:50:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:05,462 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-11-12 22:50:05,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:05,462 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-11-12 22:50:05,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-12 22:50:05,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:05,463 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:05,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:05,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:05,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:06,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:06,077 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:50:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:06,078 INFO L85 PathProgramCache]: Analyzing trace with hash -745160882, now seen corresponding path program 1 times [2021-11-12 22:50:06,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:06,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19158028] [2021-11-12 22:50:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:06,078 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:06,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:06,079 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:06,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:50:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:06,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:50:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:06,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:06,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:07,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:07,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19158028] [2021-11-12 22:50:07,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19158028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:07,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [15005535] [2021-11-12 22:50:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:07,395 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:07,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:07,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-12 22:50:07,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:07,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:07,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:07,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:08,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [15005535] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:08,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638905937] [2021-11-12 22:50:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:08,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:08,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:08,142 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:50:08,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-12 22:50:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:08,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:50:08,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:08,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:08,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:08,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638905937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:08,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:50:08,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 7, 8, 7] total 23 [2021-11-12 22:50:08,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728624113] [2021-11-12 22:50:08,381 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:50:08,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 22:50:08,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:08,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 22:50:08,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-11-12 22:50:08,382 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:10,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:10,119 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2021-11-12 22:50:10,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-12 22:50:10,128 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-12 22:50:10,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:10,129 INFO L225 Difference]: With dead ends: 87 [2021-11-12 22:50:10,130 INFO L226 Difference]: Without dead ends: 87 [2021-11-12 22:50:10,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2021-11-12 22:50:10,131 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 231 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 518.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.22ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 568.94ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:10,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 160 Invalid, 240 Unknown, 0 Unchecked, 3.22ms Time], IncrementalHoareTripleChecker [35 Valid, 185 Invalid, 0 Unknown, 20 Unchecked, 568.94ms Time] [2021-11-12 22:50:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-12 22:50:10,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 67. [2021-11-12 22:50:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 64 states have (on average 1.203125) internal successors, (77), 66 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-11-12 22:50:10,140 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 16 [2021-11-12 22:50:10,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:10,140 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-11-12 22:50:10,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:10,141 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-11-12 22:50:10,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-12 22:50:10,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:10,142 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:10,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:10,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:10,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:10,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:10,747 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:50:10,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:10,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2114005431, now seen corresponding path program 1 times [2021-11-12 22:50:10,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:10,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067562361] [2021-11-12 22:50:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:50:10,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:10,749 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:10,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:50:10,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:50:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:50:10,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:10,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-12 22:50:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:10,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:50:13,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:13,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067562361] [2021-11-12 22:50:13,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067562361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:50:13,150 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:50:13,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-12 22:50:13,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386867608] [2021-11-12 22:50:13,150 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:50:13,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:50:13,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:13,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:50:13,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-12 22:50:13,152 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:13,319 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-11-12 22:50:13,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:50:13,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-12 22:50:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:13,321 INFO L225 Difference]: With dead ends: 66 [2021-11-12 22:50:13,321 INFO L226 Difference]: Without dead ends: 47 [2021-11-12 22:50:13,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=23, Invalid=48, Unknown=1, NotChecked=0, Total=72 [2021-11-12 22:50:13,322 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 115.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.56ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 121.95ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:13,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 50 Invalid, 26 Unknown, 0 Unchecked, 0.56ms Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 7 Unchecked, 121.95ms Time] [2021-11-12 22:50:13,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-12 22:50:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-11-12 22:50:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2021-11-12 22:50:13,326 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 18 [2021-11-12 22:50:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:13,326 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2021-11-12 22:50:13,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:13,326 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2021-11-12 22:50:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-12 22:50:13,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:13,327 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1] [2021-11-12 22:50:13,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:13,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:13,527 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:50:13,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:13,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1817992175, now seen corresponding path program 2 times [2021-11-12 22:50:13,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:13,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448044955] [2021-11-12 22:50:13,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:50:13,528 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:13,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:13,529 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:13,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:50:13,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:50:13,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:13,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:50:13,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:13,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:14,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:15,186 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:15,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448044955] [2021-11-12 22:50:15,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448044955] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:15,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [338868746] [2021-11-12 22:50:15,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:50:15,187 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:15,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:15,197 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:15,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-12 22:50:15,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:50:15,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:15,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-12 22:50:15,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:15,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:15,720 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:15,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:16,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [338868746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:16,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101100508] [2021-11-12 22:50:16,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:50:16,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:16,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:16,236 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:50:16,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-12 22:50:16,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:50:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:16,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:50:16,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:16,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:16,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:17,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101100508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:17,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:50:17,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 24 [2021-11-12 22:50:17,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198390259] [2021-11-12 22:50:17,889 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:50:17,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-12 22:50:17,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-12 22:50:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:50:17,891 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:20,717 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2021-11-12 22:50:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-12 22:50:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-12 22:50:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:20,720 INFO L225 Difference]: With dead ends: 175 [2021-11-12 22:50:20,720 INFO L226 Difference]: Without dead ends: 175 [2021-11-12 22:50:20,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=313, Invalid=743, Unknown=0, NotChecked=0, Total=1056 [2021-11-12 22:50:20,721 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 186 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1132.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.13ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 1218.17ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:20,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 196 Invalid, 295 Unknown, 0 Unchecked, 3.13ms Time], IncrementalHoareTripleChecker [17 Valid, 249 Invalid, 0 Unknown, 29 Unchecked, 1218.17ms Time] [2021-11-12 22:50:20,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-12 22:50:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 63. [2021-11-12 22:50:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-11-12 22:50:20,728 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 18 [2021-11-12 22:50:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:20,728 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-11-12 22:50:20,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-11-12 22:50:20,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-12 22:50:20,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:20,730 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:20,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:20,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:21,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-12 22:50:21,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:21,336 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:50:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:21,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1755727223, now seen corresponding path program 2 times [2021-11-12 22:50:21,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:21,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142638124] [2021-11-12 22:50:21,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:50:21,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:21,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:21,339 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:21,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:50:21,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:50:21,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:21,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-12 22:50:21,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:21,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:22,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:24,966 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:24,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142638124] [2021-11-12 22:50:24,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142638124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:24,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2063909387] [2021-11-12 22:50:24,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:50:24,966 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:24,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:24,967 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:24,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-12 22:50:25,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:50:25,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:25,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:50:25,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:25,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:26,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2063909387] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:26,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911284118] [2021-11-12 22:50:26,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:50:26,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:26,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:26,975 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:50:26,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-12 22:50:27,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 22:50:27,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:27,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-12 22:50:27,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:27,205 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:27,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:50:27,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911284118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:27,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:50:27,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11, 10, 11, 10] total 38 [2021-11-12 22:50:27,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831515954] [2021-11-12 22:50:27,394 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:50:27,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-12 22:50:27,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:27,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-12 22:50:27,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2021-11-12 22:50:27,396 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:28,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:28,916 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2021-11-12 22:50:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-12 22:50:28,918 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-12 22:50:28,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:28,920 INFO L225 Difference]: With dead ends: 78 [2021-11-12 22:50:28,920 INFO L226 Difference]: Without dead ends: 76 [2021-11-12 22:50:28,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-11-12 22:50:28,922 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 676.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.66ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 730.46ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:28,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 247 Invalid, 265 Unknown, 0 Unchecked, 1.66ms Time], IncrementalHoareTripleChecker [15 Valid, 216 Invalid, 0 Unknown, 34 Unchecked, 730.46ms Time] [2021-11-12 22:50:28,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-12 22:50:28,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-11-12 22:50:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 69 states have (on average 1.173913043478261) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:28,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-11-12 22:50:28,934 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 28 [2021-11-12 22:50:28,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:28,934 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-11-12 22:50:28,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:28,934 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-11-12 22:50:28,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-12 22:50:28,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:28,936 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:50:28,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:29,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:29,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:29,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:29,537 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:50:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:29,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1191228026, now seen corresponding path program 3 times [2021-11-12 22:50:29,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:29,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619430261] [2021-11-12 22:50:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:50:29,538 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:29,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:29,539 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:29,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-12 22:50:29,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 22:50:29,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:29,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-12 22:50:29,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:29,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:50:30,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:50:32,098 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:32,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619430261] [2021-11-12 22:50:32,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619430261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:32,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [186848598] [2021-11-12 22:50:32,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:50:32,098 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:32,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:32,099 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:32,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-12 22:50:32,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 22:50:32,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:32,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 22:50:32,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:32,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:33,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-12 22:50:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:33,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:37,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [186848598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:37,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910421699] [2021-11-12 22:50:37,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:50:37,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:50:37,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:50:37,499 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:50:37,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-12 22:50:37,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-12 22:50:37,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:37,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-12 22:50:37,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:38,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:39,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910421699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:39,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:50:39,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 14, 14, 13, 12] total 57 [2021-11-12 22:50:39,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683739053] [2021-11-12 22:50:39,592 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:50:39,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-12 22:50:39,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:50:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-12 22:50:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2795, Unknown=0, NotChecked=0, Total=3192 [2021-11-12 22:50:39,595 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 57 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 57 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:48,643 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:50,400 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2021-11-12 22:50:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-12 22:50:50,402 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 57 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-12 22:50:50,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:50,402 INFO L225 Difference]: With dead ends: 160 [2021-11-12 22:50:50,402 INFO L226 Difference]: Without dead ends: 102 [2021-11-12 22:50:50,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2315 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1268, Invalid=6214, Unknown=0, NotChecked=0, Total=7482 [2021-11-12 22:50:50,405 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 847 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4926.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 847 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.03ms SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 5208.06ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:50,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [847 Valid, 678 Invalid, 1233 Unknown, 0 Unchecked, 8.03ms Time], IncrementalHoareTripleChecker [140 Valid, 1041 Invalid, 0 Unknown, 52 Unchecked, 5208.06ms Time] [2021-11-12 22:50:50,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-12 22:50:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2021-11-12 22:50:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 94 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2021-11-12 22:50:50,411 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 32 [2021-11-12 22:50:50,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:50:50,412 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2021-11-12 22:50:50,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.7017543859649122) internal successors, (154), 57 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:50:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2021-11-12 22:50:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-12 22:50:50,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:50:50,414 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1] [2021-11-12 22:50:50,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:50,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-12 22:50:50,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-12 22:50:51,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:50:51,024 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:50:51,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:50:51,025 INFO L85 PathProgramCache]: Analyzing trace with hash -563143139, now seen corresponding path program 3 times [2021-11-12 22:50:51,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:50:51,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [332731941] [2021-11-12 22:50:51,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:50:51,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:50:51,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:50:51,026 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:50:51,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-12 22:50:51,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 22:50:51,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:51,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:50:51,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:51,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:51,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:50:53,986 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:53,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:50:53,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [332731941] [2021-11-12 22:50:53,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [332731941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:50:53,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624799221] [2021-11-12 22:50:53,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:50:53,986 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:50:53,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:50:53,987 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:50:53,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-12 22:50:54,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 22:50:54,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:50:54,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:50:54,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:50:54,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:50:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:50:55,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:02,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1624799221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:02,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691330264] [2021-11-12 22:51:02,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 22:51:02,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:51:02,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:51:02,684 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:51:02,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-12 22:51:03,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-12 22:51:03,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:03,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-12 22:51:03,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:03,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:51:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:04,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:09,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691330264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:09,815 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:51:09,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13, 15, 14, 14] total 54 [2021-11-12 22:51:09,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393600133] [2021-11-12 22:51:09,816 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:51:09,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-12 22:51:09,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:51:09,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-12 22:51:09,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2152, Unknown=0, NotChecked=0, Total=2970 [2021-11-12 22:51:09,819 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:13,991 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:15,671 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:17,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:19,676 WARN L515 Checker$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 22:51:23,713 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:24,948 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:26,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:28,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:31,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:33,809 WARN L515 Checker$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 22:51:35,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:40,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:42,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:51:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:51:46,627 INFO L93 Difference]: Finished difference Result 729 states and 818 transitions. [2021-11-12 22:51:46,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-12 22:51:46,628 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-12 22:51:46,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:51:46,632 INFO L225 Difference]: With dead ends: 729 [2021-11-12 22:51:46,632 INFO L226 Difference]: Without dead ends: 729 [2021-11-12 22:51:46,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 144 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2374 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1458, Invalid=3654, Unknown=0, NotChecked=0, Total=5112 [2021-11-12 22:51:46,635 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 1170 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 100 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25961.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1170 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.34ms SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 26260.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:51:46,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1170 Valid, 631 Invalid, 1047 Unknown, 0 Unchecked, 10.34ms Time], IncrementalHoareTripleChecker [100 Valid, 889 Invalid, 6 Unknown, 52 Unchecked, 26260.90ms Time] [2021-11-12 22:51:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-11-12 22:51:46,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 127. [2021-11-12 22:51:46,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 1.168) internal successors, (146), 126 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:46,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-11-12 22:51:46,647 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 34 [2021-11-12 22:51:46,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:51:46,647 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-11-12 22:51:46,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 2.9444444444444446) internal successors, (159), 55 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:51:46,648 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-11-12 22:51:46,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-12 22:51:46,650 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:51:46,650 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:51:46,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-12 22:51:46,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-12 22:51:47,069 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-11-12 22:51:47,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:51:47,268 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:51:47,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:51:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash 368894281, now seen corresponding path program 4 times [2021-11-12 22:51:47,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:51:47,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1425174555] [2021-11-12 22:51:47,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:51:47,268 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:51:47,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:51:47,269 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:51:47,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-12 22:51:47,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:51:47,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:47,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 22:51:47,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:47,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:51:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 44 proven. 78 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-12 22:51:48,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:51:55,014 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:51:55,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1425174555] [2021-11-12 22:51:55,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1425174555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:55,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329009883] [2021-11-12 22:51:55,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:51:55,015 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:51:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:51:55,016 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:51:55,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-12 22:51:55,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:51:55,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-12 22:51:55,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:51:56,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:51:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:51:59,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1329009883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:51:59,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171668520] [2021-11-12 22:51:59,461 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 22:51:59,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:51:59,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:51:59,462 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:51:59,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-12 22:51:59,528 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 22:51:59,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:51:59,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-12 22:51:59,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:51:59,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:52:01,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-12 22:52:01,311 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:52:01,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 55 proven. 56 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-12 22:52:05,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171668520] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:05,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:52:05,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15, 14, 17, 16] total 76 [2021-11-12 22:52:05,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168298795] [2021-11-12 22:52:05,901 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:52:05,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-12 22:52:05,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:52:05,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-12 22:52:05,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=5157, Unknown=0, NotChecked=0, Total=5700 [2021-11-12 22:52:05,903 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 76 states, 76 states have (on average 2.8947368421052633) internal successors, (220), 76 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:24,243 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:52:39,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:52:39,139 INFO L93 Difference]: Finished difference Result 244 states and 274 transitions. [2021-11-12 22:52:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-12 22:52:39,141 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.8947368421052633) internal successors, (220), 76 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-12 22:52:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:52:39,143 INFO L225 Difference]: With dead ends: 244 [2021-11-12 22:52:39,143 INFO L226 Difference]: Without dead ends: 210 [2021-11-12 22:52:39,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=1340, Invalid=8962, Unknown=0, NotChecked=0, Total=10302 [2021-11-12 22:52:39,155 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 986 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9019.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 1728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.50ms SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 9495.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:52:39,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 849 Invalid, 1728 Unknown, 0 Unchecked, 6.50ms Time], IncrementalHoareTripleChecker [153 Valid, 1350 Invalid, 0 Unknown, 225 Unchecked, 9495.39ms Time] [2021-11-12 22:52:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-12 22:52:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 136. [2021-11-12 22:52:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 134 states have (on average 1.1567164179104477) internal successors, (155), 135 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 155 transitions. [2021-11-12 22:52:39,166 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 155 transitions. Word has length 52 [2021-11-12 22:52:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:52:39,166 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 155 transitions. [2021-11-12 22:52:39,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.8947368421052633) internal successors, (220), 76 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:52:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 155 transitions. [2021-11-12 22:52:39,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-12 22:52:39,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:52:39,176 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:52:39,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-12 22:52:39,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-12 22:52:39,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-12 22:52:39,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:52:39,779 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:52:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:52:39,780 INFO L85 PathProgramCache]: Analyzing trace with hash -683290673, now seen corresponding path program 5 times [2021-11-12 22:52:39,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:52:39,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504033149] [2021-11-12 22:52:39,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:52:39,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:52:39,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:52:39,781 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:52:39,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-12 22:52:40,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-12 22:52:40,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:52:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-12 22:52:40,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:52:40,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:52:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 26 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:41,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:52:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:52:49,607 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:52:49,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504033149] [2021-11-12 22:52:49,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504033149] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:52:49,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [205648126] [2021-11-12 22:52:49,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:52:49,607 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 22:52:49,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 22:52:49,608 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 22:52:49,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-12 22:56:57,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-12 22:56:57,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:56:58,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-12 22:56:58,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:57:00,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:57:04,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [205648126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:04,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389818448] [2021-11-12 22:57:04,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-12 22:57:04,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 22:57:04,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:57:04,560 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 22:57:04,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-12 22:57:23,172 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-12 22:57:23,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:57:23,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-12 22:57:23,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:57:23,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:57:25,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-11-12 22:57:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:57:25,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:57:34,053 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 31 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-12 22:57:34,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389818448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 22:57:34,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 22:57:34,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 20, 18, 23, 21] total 99 [2021-11-12 22:57:34,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052564752] [2021-11-12 22:57:34,054 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 22:57:34,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-12 22:57:34,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:57:34,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-12 22:57:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=924, Invalid=8778, Unknown=0, NotChecked=0, Total=9702 [2021-11-12 22:57:34,058 INFO L87 Difference]: Start difference. First operand 136 states and 155 transitions. Second operand has 99 states, 99 states have (on average 3.0202020202020203) internal successors, (299), 99 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:58:03,676 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 22:59:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:59:52,692 INFO L93 Difference]: Finished difference Result 400 states and 446 transitions. [2021-11-12 22:59:52,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-12 22:59:52,694 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.0202020202020203) internal successors, (299), 99 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-12 22:59:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:59:52,696 INFO L225 Difference]: With dead ends: 400 [2021-11-12 22:59:52,696 INFO L226 Difference]: Without dead ends: 277 [2021-11-12 22:59:52,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 262 SyntacticMatches, 15 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7732 ImplicationChecksByTransitivity, 137.4s TimeCoverageRelationStatistics Valid=3838, Invalid=23222, Unknown=0, NotChecked=0, Total=27060 [2021-11-12 22:59:52,701 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1881 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 356 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20199.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1881 SdHoareTripleChecker+Valid, 1998 SdHoareTripleChecker+Invalid, 3816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.02ms SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 21208.05ms IncrementalHoareTripleChecker+Time [2021-11-12 22:59:52,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1881 Valid, 1998 Invalid, 3816 Unknown, 0 Unchecked, 15.02ms Time], IncrementalHoareTripleChecker [356 Valid, 3017 Invalid, 1 Unknown, 442 Unchecked, 21208.05ms Time] [2021-11-12 22:59:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-11-12 22:59:52,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 136. [2021-11-12 22:59:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 135 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2021-11-12 22:59:52,706 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 60 [2021-11-12 22:59:52,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:59:52,707 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2021-11-12 22:59:52,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.0202020202020203) internal successors, (299), 99 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 22:59:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2021-11-12 22:59:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-12 22:59:52,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:59:52,709 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:59:52,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-12 22:59:52,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-11-12 22:59:53,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-11-12 22:59:53,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 22:59:53,324 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 22:59:53,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:59:53,324 INFO L85 PathProgramCache]: Analyzing trace with hash 573796562, now seen corresponding path program 6 times [2021-11-12 22:59:53,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:59:53,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2107240996] [2021-11-12 22:59:53,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 22:59:53,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:59:53,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:59:53,326 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:59:53,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-12 22:59:53,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-12 22:59:53,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:59:53,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-12 22:59:53,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:59:53,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 22:59:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-12 22:59:54,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-12 23:00:01,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:00:01,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2107240996] [2021-11-12 23:00:01,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2107240996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:01,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1727446084] [2021-11-12 23:00:01,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:00:01,072 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:00:01,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:00:01,072 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:00:01,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-12 23:00:03,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-12 23:00:03,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:00:03,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-12 23:00:03,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:03,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 23:00:04,089 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-12 23:00:04,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-12 23:00:14,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1727446084] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:14,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878158280] [2021-11-12 23:00:14,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-12 23:00:14,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:00:14,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:00:14,198 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:00:14,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-12 23:00:15,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-12 23:00:15,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:00:15,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-12 23:00:15,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:00:15,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 23:00:18,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-12 23:00:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 7 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:00:19,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:00:33,375 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 7 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:00:33,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878158280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:00:33,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:00:33,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15, 17, 22, 23] total 82 [2021-11-12 23:00:33,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960674919] [2021-11-12 23:00:33,375 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:00:33,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-12 23:00:33,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:00:33,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-12 23:00:33,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=5807, Unknown=0, NotChecked=0, Total=6642 [2021-11-12 23:00:33,377 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand has 82 states, 82 states have (on average 2.9634146341463414) internal successors, (243), 82 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:00:58,418 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 23:01:01,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:03,200 WARN L515 Checker$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 23:01:05,202 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:16,147 WARN L515 Checker$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 23:01:19,062 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:21,088 WARN L515 Checker$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 23:01:23,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:28,530 WARN L515 Checker$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 23:01:29,590 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:31,607 WARN L515 Checker$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 23:01:33,640 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:35,747 WARN L515 Checker$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 23:01:37,751 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:41,843 WARN L515 Checker$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 23:01:45,120 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:01:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:01:49,679 INFO L93 Difference]: Finished difference Result 319 states and 357 transitions. [2021-11-12 23:01:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-12 23:01:49,680 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.9634146341463414) internal successors, (243), 82 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-12 23:01:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:01:49,683 INFO L225 Difference]: With dead ends: 319 [2021-11-12 23:01:49,683 INFO L226 Difference]: Without dead ends: 261 [2021-11-12 23:01:49,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 297 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4898 ImplicationChecksByTransitivity, 59.2s TimeCoverageRelationStatistics Valid=2675, Invalid=12825, Unknown=0, NotChecked=0, Total=15500 [2021-11-12 23:01:49,686 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 2058 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 2103 mSolverCounterSat, 296 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39481.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2058 SdHoareTripleChecker+Valid, 1334 SdHoareTripleChecker+Invalid, 2468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.24ms SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 2103 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 40187.43ms IncrementalHoareTripleChecker+Time [2021-11-12 23:01:49,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2058 Valid, 1334 Invalid, 2468 Unknown, 0 Unchecked, 10.24ms Time], IncrementalHoareTripleChecker [296 Valid, 2103 Invalid, 14 Unknown, 55 Unchecked, 40187.43ms Time] [2021-11-12 23:01:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-12 23:01:49,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 191. [2021-11-12 23:01:49,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 190 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 214 transitions. [2021-11-12 23:01:49,692 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 214 transitions. Word has length 64 [2021-11-12 23:01:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:01:49,693 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 214 transitions. [2021-11-12 23:01:49,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.9634146341463414) internal successors, (243), 82 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:01:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 214 transitions. [2021-11-12 23:01:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-12 23:01:49,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:01:49,694 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1] [2021-11-12 23:01:49,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-12 23:01:49,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-12 23:01:50,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-12 23:01:50,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:01:50,302 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-11-12 23:01:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:01:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash 58542645, now seen corresponding path program 4 times [2021-11-12 23:01:50,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:01:50,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1800795855] [2021-11-12 23:01:50,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:01:50,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:01:50,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:01:50,304 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:01:50,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-12 23:01:50,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:01:50,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:01:50,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-12 23:01:50,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:01:50,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 23:01:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:01:52,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:02:02,851 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:02:02,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1800795855] [2021-11-12 23:02:02,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1800795855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:02,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1928386099] [2021-11-12 23:02:02,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:02:02,852 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:02:02,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:02:02,853 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:02:02,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-12 23:02:03,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:02:03,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:02:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 23:02:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:03,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 23:02:04,377 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:02:04,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:02:14,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1928386099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:14,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653304420] [2021-11-12 23:02:14,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-12 23:02:14,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:02:14,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:02:14,122 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:02:14,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2e032d7-18b7-4ea0-816d-d4f523aaa8ab/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-12 23:02:14,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-12 23:02:14,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:02:14,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-12 23:02:14,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:02:14,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-12 23:02:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:02:16,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:02:36,677 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 0 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 23:02:36,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653304420] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:02:36,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:02:36,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 19, 19, 26, 26] total 105 [2021-11-12 23:02:36,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280734446] [2021-11-12 23:02:36,678 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:02:36,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-12 23:02:36,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:02:36,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-12 23:02:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2920, Invalid=8210, Unknown=0, NotChecked=0, Total=11130 [2021-11-12 23:02:36,681 INFO L87 Difference]: Start difference. First operand 191 states and 214 transitions. Second operand has 106 states, 105 states have (on average 3.104761904761905) internal successors, (326), 106 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-12 23:02:46,239 WARN L227 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:02:48,340 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 23:02:50,383 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:52,385 WARN L515 Checker$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 23:02:54,387 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:02:56,390 WARN L515 Checker$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 23:02:58,393 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:00,396 WARN L515 Checker$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 23:03:02,398 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:07,966 WARN L227 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-12 23:03:15,161 WARN L515 Checker$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 23:03:17,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:19,197 WARN L515 Checker$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 23:03:21,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:23,202 WARN L515 Checker$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 23:03:25,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:27,263 WARN L515 Checker$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 23:03:29,266 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:39,866 WARN L515 Checker$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 23:03:41,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:43,908 WARN L515 Checker$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 23:03:45,949 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:47,952 WARN L515 Checker$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 23:03:49,955 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:03:52,006 WARN L515 Checker$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 23:04:03,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 23:04:05,227 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []